]> git.sesse.net Git - mlt/blobdiff - src/modules/avformat/consumer_avformat.c
Detect video codecs that use the new libavcodec "encode2" method.
[mlt] / src / modules / avformat / consumer_avformat.c
index 7f38665b19575c71ff7ac7cc6070178b8d9d56f5..20e25fa6db8013b11d922dea91431f7d00877a5d 100644 (file)
@@ -1,7 +1,8 @@
 /*
  * consumer_avformat.c -- an encoder based on avformat
- * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
+ * Copyright (C) 2003-2012 Ushodaya Enterprises Limited
  * Author: Charles Yates <charles.yates@pandora.be>
+ * Author: Dan Dennedy <dan@dennedy.org>
  * Much code borrowed from ffmpeg.c: Copyright (c) 2000-2003 Fabrice Bellard
  *
  * This library is free software; you can redistribute it and/or
@@ -24,6 +25,7 @@
 #include <framework/mlt_frame.h>
 #include <framework/mlt_profile.h>
 #include <framework/mlt_log.h>
+#include <framework/mlt_events.h>
 
 // System header files
 #include <stdio.h>
 #include <unistd.h>
 
 // avformat header files
-#include <avformat.h>
+#include <libavformat/avformat.h>
+#include <libavformat/avio.h>
 #ifdef SWSCALE
-#include <swscale.h>
+#include <libswscale/swscale.h>
+#endif
+#if LIBAVUTIL_VERSION_INT >= ((50<<16)+(8<<8)+0)
+#include <libavutil/pixdesc.h>
+#endif
+#include <libavutil/mathematics.h>
+
+#if LIBAVUTIL_VERSION_INT >= ((50<<16)+(38<<8)+0)
+#  include <libavutil/samplefmt.h>
+#else
+#  define AV_SAMPLE_FMT_NONE SAMPLE_FMT_NONE
+#  define AV_SAMPLE_FMT_S16 SAMPLE_FMT_S16
+#  define AV_SAMPLE_FMT_S32 SAMPLE_FMT_S32
+#  define AV_SAMPLE_FMT_FLT SAMPLE_FMT_FLT
 #endif
-#include <opt.h>
 
 #if LIBAVUTIL_VERSION_INT < (50<<16)
 #define PIX_FMT_RGB32 PIX_FMT_RGBA32
 #define PIX_FMT_YUYV422 PIX_FMT_YUV422
 #endif
 
+#if LIBAVCODEC_VERSION_MAJOR >= 53
+#include <libavutil/opt.h>
+#define CODEC_TYPE_VIDEO      AVMEDIA_TYPE_VIDEO
+#define CODEC_TYPE_AUDIO      AVMEDIA_TYPE_AUDIO
+#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
+#else
+#include <libavcodec/opt.h>
+#endif
+
+#define MAX_AUDIO_STREAMS (8)
+#define AUDIO_ENCODE_BUFFER_SIZE (48000 * 2 * MAX_AUDIO_STREAMS)
+#define AUDIO_BUFFER_SIZE (1024 * 42)
+#define VIDEO_BUFFER_SIZE (2048 * 1024)
+
 //
 // This structure should be extended and made globally available in mlt
 //
 
 typedef struct
 {
-       int16_t *buffer;
+       uint8_t *buffer;
        int size;
        int used;
        double time;
@@ -63,99 +92,73 @@ typedef struct
 
 sample_fifo sample_fifo_init( int frequency, int channels )
 {
-       sample_fifo this = calloc( 1, sizeof( sample_fifo_s ) );
-       this->frequency = frequency;
-       this->channels = channels;
-       return this;
+       sample_fifo fifo = calloc( 1, sizeof( sample_fifo_s ) );
+       fifo->frequency = frequency;
+       fifo->channels = channels;
+       return fifo;
 }
 
-// sample_fifo_clear and check are temporarily aborted (not working as intended)
-
-void sample_fifo_clear( sample_fifo this, double time )
+// count is the number of samples multiplied by the number of bytes per sample
+void sample_fifo_append( sample_fifo fifo, uint8_t *samples, int count )
 {
-       int words = ( float )( time - this->time ) * this->frequency * this->channels;
-       if ( ( int )( ( float )time * 100 ) < ( int )( ( float )this->time * 100 ) && this->used > words && words > 0 )
+       if ( ( fifo->size - fifo->used ) < count )
        {
-               memmove( this->buffer, &this->buffer[ words ], ( this->used - words ) * sizeof( int16_t ) );
-               this->used -= words;
-               this->time = time;
+               fifo->size += count * 5;
+               fifo->buffer = realloc( fifo->buffer, fifo->size );
        }
-       else if ( ( int )( ( float )time * 100 ) != ( int )( ( float )this->time * 100 ) )
-       {
-               this->used = 0;
-               this->time = time;
-       }
-}
 
-void sample_fifo_check( sample_fifo this, double time )
-{
-       if ( this->used == 0 )
-       {
-               if ( ( int )( ( float )time * 100 ) < ( int )( ( float )this->time * 100 ) )
-                       this->time = time;
-       }
+       memcpy( &fifo->buffer[ fifo->used ], samples, count );
+       fifo->used += count;
 }
 
-void sample_fifo_append( sample_fifo this, int16_t *samples, int count )
+int sample_fifo_used( sample_fifo fifo )
 {
-       if ( ( this->size - this->used ) < count )
-       {
-               this->size += count * 5;
-               this->buffer = realloc( this->buffer, this->size * sizeof( int16_t ) );
-       }
-
-       memcpy( &this->buffer[ this->used ], samples, count * sizeof( int16_t ) );
-       this->used += count;
+       return fifo->used;
 }
 
-int sample_fifo_used( sample_fifo this )
+int sample_fifo_fetch( sample_fifo fifo, uint8_t *samples, int count )
 {
-       return this->used;
-}
+       if ( count > fifo->used )
+               count = fifo->used;
 
-int sample_fifo_fetch( sample_fifo this, int16_t *samples, int count )
-{
-       if ( count > this->used )
-               count = this->used;
-
-       memcpy( samples, this->buffer, count * sizeof( int16_t ) );
-       this->used -= count;
-       memmove( this->buffer, &this->buffer[ count ], this->used * sizeof( int16_t ) );
+       memcpy( samples, fifo->buffer, count );
+       fifo->used -= count;
+       memmove( fifo->buffer, &fifo->buffer[ count ], fifo->used );
 
-       this->time += ( double )count / this->channels / this->frequency;
+       fifo->time += ( double )count / fifo->channels / fifo->frequency;
 
        return count;
 }
 
-void sample_fifo_close( sample_fifo this )
+void sample_fifo_close( sample_fifo fifo )
 {
-       free( this->buffer );
-       free( this );
+       free( fifo->buffer );
+       free( fifo );
 }
 
 // Forward references.
-static int consumer_start( mlt_consumer this );
-static int consumer_stop( mlt_consumer this );
-static int consumer_is_stopped( mlt_consumer this );
+static int consumer_start( mlt_consumer consumer );
+static int consumer_stop( mlt_consumer consumer );
+static int consumer_is_stopped( mlt_consumer consumer );
 static void *consumer_thread( void *arg );
-static void consumer_close( mlt_consumer this );
+static void consumer_close( mlt_consumer consumer );
 
-/** Initialise the dv consumer.
+/** Initialise the consumer.
 */
 
 mlt_consumer consumer_avformat_init( mlt_profile profile, char *arg )
 {
        // Allocate the consumer
-       mlt_consumer this = mlt_consumer_new( profile );
+       mlt_consumer consumer = mlt_consumer_new( profile );
 
        // If memory allocated and initialises without error
-       if ( this != NULL )
+       if ( consumer != NULL )
        {
                // Get properties from the consumer
-               mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+               mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 
                // Assign close callback
-               this->close = consumer_close;
+               consumer->close = consumer_close;
 
                // Interpret the argument
                if ( arg != NULL )
@@ -183,55 +186,88 @@ mlt_consumer consumer_avformat_init( mlt_profile profile, char *arg )
                mlt_properties_set_int( properties, "prefill", 1 );
 
                // Set up start/stop/terminated callbacks
-               this->start = consumer_start;
-               this->stop = consumer_stop;
-               this->is_stopped = consumer_is_stopped;
+               consumer->start = consumer_start;
+               consumer->stop = consumer_stop;
+               consumer->is_stopped = consumer_is_stopped;
+               
+               mlt_events_register( properties, "consumer-fatal-error", NULL );
        }
 
-       // Return this
-       return this;
+       // Return consumer
+       return consumer;
 }
 
 /** Start the consumer.
 */
 
-static int consumer_start( mlt_consumer this )
+static int consumer_start( mlt_consumer consumer )
 {
        // Get the properties
-       mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+       mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
        int error = 0;
 
        // Report information about available muxers and codecs as YAML Tiny
        char *s = mlt_properties_get( properties, "f" );
        if ( s && strcmp( s, "list" ) == 0 )
        {
-               fprintf( stderr, "---\nformats:\n" );
+               mlt_properties doc = mlt_properties_new();
+               mlt_properties formats = mlt_properties_new();
+               char key[20];
                AVOutputFormat *format = NULL;
+               
+               mlt_properties_set_data( properties, "f", formats, 0, (mlt_destructor) mlt_properties_close, NULL );
+               mlt_properties_set_data( doc, "formats", formats, 0, NULL, NULL );
                while ( ( format = av_oformat_next( format ) ) )
-                       fprintf( stderr, "  - %s\n", format->name );
-               fprintf( stderr, "...\n" );
+               {
+                       snprintf( key, sizeof(key), "%d", mlt_properties_count( formats ) );
+                       mlt_properties_set( formats, key, format->name );
+               }
+               fprintf( stdout, "%s", mlt_properties_serialise_yaml( doc ) );
+               mlt_properties_close( doc );
                error = 1;
        }
        s = mlt_properties_get( properties, "acodec" );
        if ( s && strcmp( s, "list" ) == 0 )
        {
-               fprintf( stderr, "---\naudio_codecs:\n" );
+               mlt_properties doc = mlt_properties_new();
+               mlt_properties codecs = mlt_properties_new();
+               char key[20];
                AVCodec *codec = NULL;
+
+               mlt_properties_set_data( properties, "acodec", codecs, 0, (mlt_destructor) mlt_properties_close, NULL );
+               mlt_properties_set_data( doc, "audio_codecs", codecs, 0, NULL, NULL );
                while ( ( codec = av_codec_next( codec ) ) )
                        if ( codec->encode && codec->type == CODEC_TYPE_AUDIO )
-                               fprintf( stderr, "  - %s\n", codec->name );
-               fprintf( stderr, "...\n" );
+                       {
+                               snprintf( key, sizeof(key), "%d", mlt_properties_count( codecs ) );
+                               mlt_properties_set( codecs, key, codec->name );
+                       }
+               fprintf( stdout, "%s", mlt_properties_serialise_yaml( doc ) );
+               mlt_properties_close( doc );
                error = 1;
        }
        s = mlt_properties_get( properties, "vcodec" );
        if ( s && strcmp( s, "list" ) == 0 )
        {
-               fprintf( stderr, "---\nvideo_codecs:\n" );
+               mlt_properties doc = mlt_properties_new();
+               mlt_properties codecs = mlt_properties_new();
+               char key[20];
                AVCodec *codec = NULL;
+
+               mlt_properties_set_data( properties, "vcodec", codecs, 0, (mlt_destructor) mlt_properties_close, NULL );
+               mlt_properties_set_data( doc, "video_codecs", codecs, 0, NULL, NULL );
                while ( ( codec = av_codec_next( codec ) ) )
+#if LIBAVCODEC_VERSION_INT >= ((53<<16)+(34<<8)+0)
+                       if ( (codec->encode || codec->encode2) && codec->type == CODEC_TYPE_VIDEO )
+#else
                        if ( codec->encode && codec->type == CODEC_TYPE_VIDEO )
-                               fprintf( stderr, "  - %s\n", codec->name );
-               fprintf( stderr, "...\n" );
+#endif
+                       {
+                               snprintf( key, sizeof(key), "%d", mlt_properties_count( codecs ) );
+                               mlt_properties_set( codecs, key, codec->name );
+                       }
+               fprintf( stdout, "%s", mlt_properties_serialise_yaml( doc ) );
+               mlt_properties_close( doc );
                error = 1;
        }
 
@@ -259,7 +295,7 @@ static int consumer_start( mlt_consumer this )
                        }
                        else
                        {
-                               mlt_log_warning( MLT_CONSUMER_SERVICE( this ), "Invalid size property %s - ignoring.\n", size );
+                               mlt_log_warning( MLT_CONSUMER_SERVICE( consumer ), "Invalid size property %s - ignoring.\n", size );
                        }
                }
                
@@ -271,7 +307,7 @@ static int consumer_start( mlt_consumer this )
 
                // We need to set these on the profile as well because the s property is
                // an alias to mlt properties that correspond to profile settings.
-               mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+               mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( consumer ) );
                if ( profile )
                {
                        profile->width = width;
@@ -302,11 +338,11 @@ static int consumer_start( mlt_consumer this )
                // Assign the thread to properties
                mlt_properties_set_data( properties, "thread", thread, sizeof( pthread_t ), free, NULL );
 
+               // Create the thread
+               pthread_create( thread, NULL, consumer_thread, consumer );
+
                // Set the running state
                mlt_properties_set_int( properties, "running", 1 );
-
-               // Create the thread
-               pthread_create( thread, NULL, consumer_thread, this );
        }
        return error;
 }
@@ -314,22 +350,22 @@ static int consumer_start( mlt_consumer this )
 /** Stop the consumer.
 */
 
-static int consumer_stop( mlt_consumer this )
+static int consumer_stop( mlt_consumer consumer )
 {
        // Get the properties
-       mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+       mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
+       pthread_t *thread = mlt_properties_get_data( properties, "thread", NULL );
 
        // Check that we're running
-       if ( mlt_properties_get_int( properties, "running" ) )
+       if ( thread )
        {
-               // Get the thread
-               pthread_t *thread = mlt_properties_get_data( properties, "thread", NULL );
-
                // Stop the thread
                mlt_properties_set_int( properties, "running", 0 );
 
                // Wait for termination
                pthread_join( *thread, NULL );
+
+               mlt_properties_set( properties, "thread", NULL );
        }
 
        return 0;
@@ -338,10 +374,10 @@ static int consumer_stop( mlt_consumer this )
 /** Determine if the consumer is stopped.
 */
 
-static int consumer_is_stopped( mlt_consumer this )
+static int consumer_is_stopped( mlt_consumer consumer )
 {
        // Get the properties
-       mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+       mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
        return !mlt_properties_get_int( properties, "running" );
 }
 
@@ -351,32 +387,124 @@ static int consumer_is_stopped( mlt_consumer this )
 static void apply_properties( void *obj, mlt_properties properties, int flags )
 {
        int i;
-       int count = mlt_properties_count( properties ); 
+       int count = mlt_properties_count( properties );
+#if LIBAVUTIL_VERSION_INT < ((51<<16)+(12<<8)+0)
+       int alloc = 1;
+#endif
+
        for ( i = 0; i < count; i++ )
        {
                const char *opt_name = mlt_properties_get_name( properties, i );
+#if LIBAVUTIL_VERSION_INT >= ((51<<16)+(10<<8)+0)
+               const AVOption *opt = av_opt_find( obj, opt_name, NULL, flags, flags );
+#else
                const AVOption *opt = av_find_opt( obj, opt_name, NULL, flags, flags );
-               if ( opt != NULL )
-#if LIBAVCODEC_VERSION_INT >= ((52<<16)+(7<<8)+0)
-                       av_set_string3( obj, opt_name, mlt_properties_get( properties, opt_name), 0, NULL );
+#endif
+
+               // If option not found, see if it was prefixed with a or v (-vb)
+               if ( !opt && (
+                       ( opt_name[0] == 'v' && ( flags & AV_OPT_FLAG_VIDEO_PARAM ) ) ||
+                       ( opt_name[0] == 'a' && ( flags & AV_OPT_FLAG_AUDIO_PARAM ) ) ) )
+#if LIBAVUTIL_VERSION_INT >= ((51<<16)+(10<<8)+0)
+                       opt = av_opt_find( obj, ++opt_name, NULL, flags, flags );
+#else
+                       opt = av_find_opt( obj, ++opt_name, NULL, flags, flags );
+#endif
+               // Apply option if found
+               if ( opt )
+#if LIBAVUTIL_VERSION_INT >= ((51<<16)+(12<<8)+0)
+                       av_opt_set( obj, opt_name, mlt_properties_get_value( properties, i), 0 );
+#elif LIBAVCODEC_VERSION_INT >= ((52<<16)+(7<<8)+0)
+                       av_set_string3( obj, opt_name, mlt_properties_get_value( properties, i), alloc, NULL );
 #elif LIBAVCODEC_VERSION_INT >= ((51<<16)+(59<<8)+0)
-                       av_set_string2( obj, opt_name, mlt_properties_get( properties, opt_name), 0 );
+                       av_set_string2( obj, opt_name, mlt_properties_get_value( properties, i), alloc );
 #else
-                       av_set_string( obj, opt_name, mlt_properties_get( properties, opt_name) );
+                       av_set_string( obj, opt_name, mlt_properties_get_value( properties, i) );
+#endif
+       }
+}
+
+static int get_mlt_audio_format( int av_sample_fmt )
+{
+       switch ( av_sample_fmt )
+       {
+       case AV_SAMPLE_FMT_S32:
+               return mlt_audio_s32le;
+       case AV_SAMPLE_FMT_FLT:
+               return mlt_audio_f32le;
+#if LIBAVUTIL_VERSION_INT >= ((51<<16)+(17<<8)+0)
+       case AV_SAMPLE_FMT_S32P:
+               return mlt_audio_s32;
+       case AV_SAMPLE_FMT_FLTP:
+               return mlt_audio_float;
+#endif
+       default:
+               return mlt_audio_s16;
+       }
+}
+
+static int pick_sample_fmt( mlt_properties properties, AVCodec *codec )
+{
+       int sample_fmt = AV_SAMPLE_FMT_S16;
+       const char *format = mlt_properties_get( properties, "mlt_audio_format" );
+       const int *p = codec->sample_fmts;
+
+       // get default av_sample_fmt from mlt_audio_format
+       if ( format )
+       {
+               if ( !strcmp( format, "s32le" ) )
+                       sample_fmt = AV_SAMPLE_FMT_S32;
+               else if ( !strcmp( format, "f32le" ) )
+                       sample_fmt = AV_SAMPLE_FMT_FLT;
+#if LIBAVUTIL_VERSION_INT >= ((51<<16)+(17<<8)+0)
+               else if ( !strcmp( format, "s32" ) )
+                       sample_fmt = AV_SAMPLE_FMT_S32P;
+               else if ( !strcmp( format, "float" ) )
+                       sample_fmt = AV_SAMPLE_FMT_FLTP;
+#endif
+       }
+       // check if codec supports our mlt_audio_format
+       for ( ; *p != -1; p++ )
+       {
+               if ( *p == sample_fmt )
+                       return sample_fmt;
+       }
+       // no match - pick first one we support
+       for ( p = codec->sample_fmts; *p != -1; p++ )
+       {
+               switch (*p)
+               {
+               case AV_SAMPLE_FMT_S16:
+               case AV_SAMPLE_FMT_S32:
+               case AV_SAMPLE_FMT_FLT:
+#if LIBAVUTIL_VERSION_INT >= ((51<<16)+(17<<8)+0)
+               case AV_SAMPLE_FMT_S32P:
+               case AV_SAMPLE_FMT_FLTP:
 #endif
+                       return *p;
+               default:
+                       break;
+               }
        }
+       mlt_log_error( properties, "audio codec sample_fmt not compatible" );
+
+       return AV_SAMPLE_FMT_NONE;
 }
 
 /** Add an audio output stream
 */
 
-static AVStream *add_audio_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
+static AVStream *add_audio_stream( mlt_consumer consumer, AVFormatContext *oc, AVCodec *codec, int channels )
 {
        // Get the properties
-       mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+       mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 
        // Create a new stream
-       AVStream *st = av_new_stream( oc, 1 );
+#if LIBAVFORMAT_VERSION_INT >= ((53<<16)+(10<<8)+0)
+       AVStream *st = avformat_new_stream( oc, codec );
+#else
+       AVStream *st = av_new_stream( oc, oc->nb_streams );
+#endif
 
        // If created, then initialise from properties
        if ( st != NULL ) 
@@ -384,17 +512,24 @@ static AVStream *add_audio_stream( mlt_consumer this, AVFormatContext *oc, int c
                AVCodecContext *c = st->codec;
 
                // Establish defaults from AVOptions
+#if LIBAVCODEC_VERSION_MAJOR >= 53
+               avcodec_get_context_defaults3( c, codec );
+#else
                avcodec_get_context_defaults2( c, CODEC_TYPE_AUDIO );
+#endif
 
-               c->codec_id = codec_id;
+               c->codec_id = codec->id;
                c->codec_type = CODEC_TYPE_AUDIO;
+               c->sample_fmt = pick_sample_fmt( properties, codec );
 
+#if 0 // disabled until some audio codecs are multi-threaded
                // Setup multi-threading
                int thread_count = mlt_properties_get_int( properties, "threads" );
                if ( thread_count == 0 && getenv( "MLT_AVFORMAT_THREADS" ) )
                        thread_count = atoi( getenv( "MLT_AVFORMAT_THREADS" ) );
                if ( thread_count > 1 )
-                       avcodec_thread_init( c, thread_count );         
+                       c->thread_count = thread_count;
+#endif
        
                if (oc->oformat->flags & AVFMT_GLOBALHEADER) 
                        c->flags |= CODEC_FLAG_GLOBAL_HEADER;
@@ -411,32 +546,51 @@ static AVStream *add_audio_stream( mlt_consumer this, AVFormatContext *oc, int c
                }
 
                // Process properties as AVOptions
+               char *apre = mlt_properties_get( properties, "apre" );
+               if ( apre )
+               {
+                       mlt_properties p = mlt_properties_load( apre );
+                       apply_properties( c, p, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM );
+                       mlt_properties_close( p );
+               }
                apply_properties( c, properties, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM );
 
                int audio_qscale = mlt_properties_get_int( properties, "aq" );
         if ( audio_qscale > QSCALE_NONE )
                {
                        c->flags |= CODEC_FLAG_QSCALE;
-                       c->global_quality = st->quality = FF_QP2LAMBDA * audio_qscale;
+                       c->global_quality = FF_QP2LAMBDA * audio_qscale;
+#if LIBAVFORMAT_VERSION_MAJOR < 53
+                       st->quality = c->global_quality;
+#endif
                }
 
                // Set parameters controlled by MLT
                c->sample_rate = mlt_properties_get_int( properties, "frequency" );
                c->time_base = ( AVRational ){ 1, c->sample_rate };
-               c->channels = mlt_properties_get_int( properties, "channels" );
+               c->channels = channels;
 
                if ( mlt_properties_get( properties, "alang" ) != NULL )
+#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(43<<8)+0)
+#if LIBAVUTIL_VERSION_INT >= ((51<<16)+(8<<8)+0)
+                       av_dict_set( &oc->metadata, "language", mlt_properties_get( properties, "alang" ), 0 );
+#else
+                       av_metadata_set2( &oc->metadata, "language", mlt_properties_get( properties, "alang" ), 0 );
+#endif
+#else
+
                        strncpy( st->language, mlt_properties_get( properties, "alang" ), sizeof( st->language ) );
+#endif
        }
        else
        {
-               mlt_log_error( MLT_CONSUMER_SERVICE( this ), "Could not allocate a stream for audio\n" );
+               mlt_log_error( MLT_CONSUMER_SERVICE( consumer ), "Could not allocate a stream for audio\n" );
        }
 
        return st;
 }
 
-static int open_audio( AVFormatContext *oc, AVStream *st, int audio_outbuf_size )
+static int open_audio( mlt_properties properties, AVFormatContext *oc, AVStream *st, int audio_outbuf_size, const char *codec_name )
 {
        // We will return the audio input size from here
        int audio_input_frame_size = 0;
@@ -445,10 +599,39 @@ static int open_audio( AVFormatContext *oc, AVStream *st, int audio_outbuf_size
        AVCodecContext *c = st->codec;
 
        // Find the encoder
-       AVCodec *codec = avcodec_find_encoder( c->codec_id );
+       AVCodec *codec;
+       if ( codec_name )
+               codec = avcodec_find_encoder_by_name( codec_name );
+       else
+               codec = avcodec_find_encoder( c->codec_id );
+
+#if LIBAVCODEC_VERSION_INT >= ((52<<16)+(122<<8)+0)
+       // Process properties as AVOptions on the AVCodec
+       if ( codec && codec->priv_class )
+       {
+               char *apre = mlt_properties_get( properties, "apre" );
+               if ( !c->priv_data && codec->priv_data_size )
+               {
+                       c->priv_data = av_mallocz( codec->priv_data_size );
+                       *(const AVClass **) c->priv_data = codec->priv_class;
+//                     av_opt_set_defaults( c );
+               }
+               if ( apre )
+               {
+                       mlt_properties p = mlt_properties_load( apre );
+                       apply_properties( c->priv_data, p, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM );
+                       mlt_properties_close( p );
+               }
+               apply_properties( c->priv_data, properties, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM );
+       }
+#endif
 
        // Continue if codec found and we can open it
-       if ( codec != NULL && avcodec_open( c, codec ) >= 0 )
+#if LIBAVCODEC_VERSION_INT >= ((53<<16)+(8<<8)+0)
+       if ( codec && avcodec_open2( c, codec, NULL ) >= 0 )
+#else
+       if ( codec && avcodec_open( c, codec ) >= 0 )
+#endif
        {
                // ugly hack for PCM codecs (will be removed ASAP with new PCM
                // support to compute the input frame size in samples
@@ -495,13 +678,17 @@ static void close_audio( AVFormatContext *oc, AVStream *st )
 /** Add a video output stream 
 */
 
-static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
+static AVStream *add_video_stream( mlt_consumer consumer, AVFormatContext *oc, AVCodec *codec )
 {
        // Get the properties
-       mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+       mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 
        // Create a new stream
-       AVStream *st = av_new_stream( oc, 0 );
+#if LIBAVFORMAT_VERSION_INT >= ((53<<16)+(10<<8)+0)
+       AVStream *st = avformat_new_stream( oc, codec );
+#else
+       AVStream *st = av_new_stream( oc, oc->nb_streams );
+#endif
 
        if ( st != NULL ) 
        {
@@ -509,9 +696,13 @@ static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int c
                AVCodecContext *c = st->codec;
 
                // Establish defaults from AVOptions
+#if LIBAVCODEC_VERSION_MAJOR >= 53
+               avcodec_get_context_defaults3( c, codec );
+#else
                avcodec_get_context_defaults2( c, CODEC_TYPE_VIDEO );
+#endif
 
-               c->codec_id = codec_id;
+               c->codec_id = codec->id;
                c->codec_type = CODEC_TYPE_VIDEO;
                
                // Setup multi-threading
@@ -519,10 +710,49 @@ static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int c
                if ( thread_count == 0 && getenv( "MLT_AVFORMAT_THREADS" ) )
                        thread_count = atoi( getenv( "MLT_AVFORMAT_THREADS" ) );
                if ( thread_count > 1 )
-                       avcodec_thread_init( c, thread_count );         
-       
+#if LIBAVCODEC_VERSION_MAJOR >= 53
+                       c->thread_count = thread_count;
+#else
+                       avcodec_thread_init( c, thread_count );
+#endif
+
                // Process properties as AVOptions
+               char *vpre = mlt_properties_get( properties, "vpre" );
+               if ( vpre )
+               {
+                       mlt_properties p = mlt_properties_load( vpre );
+#ifdef AVDATADIR
+                       if ( mlt_properties_count( p ) < 1 )
+                       {
+                               AVCodec *codec = avcodec_find_encoder( c->codec_id );
+                               if ( codec )
+                               {
+                                       char *path = malloc( strlen(AVDATADIR) + strlen(codec->name) + strlen(vpre) + strlen(".ffpreset") + 2 );
+                                       strcpy( path, AVDATADIR );
+                                       strcat( path, codec->name );
+                                       strcat( path, "-" );
+                                       strcat( path, vpre );
+                                       strcat( path, ".ffpreset" );
+                                       
+                                       mlt_properties_close( p );
+                                       p = mlt_properties_load( path );
+                                       if ( mlt_properties_count( p ) > 0 )
+                                               mlt_properties_debug( p, path, stderr );
+                                       free( path );   
+                               }
+                       }
+                       else
+                       {
+                               mlt_properties_debug( p, vpre, stderr );                        
+                       }
+#endif
+                       apply_properties( c, p, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM );
+                       mlt_properties_close( p );
+               }
+               int colorspace = mlt_properties_get_int( properties, "colorspace" );
+               mlt_properties_set( properties, "colorspace", NULL );
                apply_properties( c, properties, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM );
+               mlt_properties_set_int( properties, "colorspace", colorspace );
 
                // Set options controlled by MLT
                c->width = mlt_properties_get_int( properties, "width" );
@@ -531,7 +761,32 @@ static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int c
                c->time_base.den = mlt_properties_get_int( properties, "frame_rate_num" );
                if ( st->time_base.den == 0 )
                        st->time_base = c->time_base;
+#if LIBAVUTIL_VERSION_INT >= ((50<<16)+(8<<8)+0)
+               c->pix_fmt = pix_fmt ? av_get_pix_fmt( pix_fmt ) : PIX_FMT_YUV420P;
+#else
                c->pix_fmt = pix_fmt ? avcodec_get_pix_fmt( pix_fmt ) : PIX_FMT_YUV420P;
+#endif
+               
+#if LIBAVCODEC_VERSION_INT > ((52<<16)+(28<<8)+0)
+               switch ( colorspace )
+               {
+               case 170:
+                       c->colorspace = AVCOL_SPC_SMPTE170M;
+                       break;
+               case 240:
+                       c->colorspace = AVCOL_SPC_SMPTE240M;
+                       break;
+               case 470:
+                       c->colorspace = AVCOL_SPC_BT470BG;
+                       break;
+               case 601:
+                       c->colorspace = ( 576 % c->height ) ? AVCOL_SPC_SMPTE170M : AVCOL_SPC_BT470BG;
+                       break;
+               case 709:
+                       c->colorspace = AVCOL_SPC_BT709;
+                       break;
+               }
+#endif
 
                if ( mlt_properties_get( properties, "aspect" ) )
                {
@@ -543,7 +798,7 @@ static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int c
                        // for mlt properties that correspond to profile settings
                        mlt_properties_set_int( properties, "display_aspect_num", rational.num );
                        mlt_properties_set_int( properties, "display_aspect_den", rational.den );
-                       mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( this ) );
+                       mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( consumer ) );
                        if ( profile )
                        {
                                profile->display_aspect_num = rational.num;
@@ -577,7 +832,10 @@ static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int c
                if ( mlt_properties_get_double( properties, "qscale" ) > 0 )
                {
                        c->flags |= CODEC_FLAG_QSCALE;
-                       st->quality = FF_QP2LAMBDA * mlt_properties_get_double( properties, "qscale" );
+                       c->global_quality = FF_QP2LAMBDA * mlt_properties_get_double( properties, "qscale" );
+#if LIBAVFORMAT_VERSION_MAJOR < 53
+                       st->quality = c->global_quality;
+#endif
                }
 
                // Allow the user to override the video fourcc
@@ -613,7 +871,7 @@ static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int c
                        int start, end, q;
                        int e = sscanf( rc_override, "%d,%d,%d", &start, &end, &q );
                        if ( e != 3 )
-                               mlt_log_warning( MLT_CONSUMER_SERVICE( this ), "Error parsing rc_override\n" );
+                               mlt_log_warning( MLT_CONSUMER_SERVICE( consumer ), "Error parsing rc_override\n" );
                        c->rc_override = av_realloc( c->rc_override, sizeof( RcOverride ) * ( i + 1 ) );
                        c->rc_override[i].start_frame = start;
                        c->rc_override[i].end_frame = end;
@@ -642,7 +900,7 @@ static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int c
                        c->flags |= CODEC_FLAG_PASS1;
                else if ( i == 2 )
                        c->flags |= CODEC_FLAG_PASS2;
-               if ( codec_id != CODEC_ID_H264 && ( c->flags & ( CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2 ) ) )
+               if ( codec->id != CODEC_ID_H264 && ( c->flags & ( CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2 ) ) )
                {
                        char logfilename[1024];
                        FILE *f;
@@ -675,14 +933,13 @@ static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int c
                                        fseek( f, 0, SEEK_SET );
                                        logbuffer = av_malloc( size + 1 );
                                        if ( !logbuffer )
-                                               mlt_log_fatal( MLT_CONSUMER_SERVICE( this ), "Could not allocate log buffer\n" );
+                                               mlt_log_fatal( MLT_CONSUMER_SERVICE( consumer ), "Could not allocate log buffer\n" );
                                        else
                                        {
                                                size = fread( logbuffer, 1, size, f );
                                                fclose( f );
                                                logbuffer[size] = '\0';
                                                c->stats_in = logbuffer;
-                                               mlt_properties_set_data( properties, "_logbuffer", logbuffer, 0, ( mlt_destructor )av_free, NULL );
                                        }
                                }
                        }
@@ -690,7 +947,7 @@ static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int c
        }
        else
        {
-               mlt_log_error( MLT_CONSUMER_SERVICE( this ), "Could not allocate a stream for video\n" );
+               mlt_log_error( MLT_CONSUMER_SERVICE( consumer ), "Could not allocate a stream for video\n" );
        }
  
        return st;
@@ -723,14 +980,39 @@ static AVFrame *alloc_picture( int pix_fmt, int width, int height )
 
        return picture;
 }
-       
-static int open_video(AVFormatContext *oc, AVStream *st)
+
+static int open_video( mlt_properties properties, AVFormatContext *oc, AVStream *st, const char *codec_name )
 {
        // Get the codec
        AVCodecContext *video_enc = st->codec;
 
        // find the video encoder
-       AVCodec *codec = avcodec_find_encoder( video_enc->codec_id );
+       AVCodec *codec;
+       if ( codec_name )
+               codec = avcodec_find_encoder_by_name( codec_name );
+       else
+               codec = avcodec_find_encoder( video_enc->codec_id );
+
+#if LIBAVCODEC_VERSION_INT >= ((52<<16)+(122<<8)+0)
+       // Process properties as AVOptions on the AVCodec
+       if ( codec && codec->priv_class )
+       {
+               char *vpre = mlt_properties_get( properties, "vpre" );
+               if ( !video_enc->priv_data && codec->priv_data_size )
+               {
+                       video_enc->priv_data = av_mallocz( codec->priv_data_size );
+                       *(const AVClass **) video_enc->priv_data = codec->priv_class;
+//                     av_opt_set_defaults( video_enc );
+               }
+               if ( vpre )
+               {
+                       mlt_properties p = mlt_properties_load( vpre );
+                       apply_properties( video_enc->priv_data, p, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM );
+                       mlt_properties_close( p );
+               }
+               apply_properties( video_enc->priv_data, properties, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM );
+       }
+#endif
 
        if( codec && codec->pix_fmts )
        {
@@ -744,14 +1026,22 @@ static int open_video(AVFormatContext *oc, AVStream *st)
                        video_enc->pix_fmt = codec->pix_fmts[ 0 ];
        }
 
-       // Open the codec safely
-       return codec != NULL && avcodec_open( video_enc, codec ) >= 0;
+#if LIBAVCODEC_VERSION_INT >= ((53<<16)+(8<<8)+0)
+       int result = codec && avcodec_open2( video_enc, codec, NULL ) >= 0;
+#else
+       int result = codec && avcodec_open( video_enc, codec ) >= 0;
+#endif
+       
+       return result;
 }
 
 void close_video(AVFormatContext *oc, AVStream *st)
 {
        if ( st && st->codec )
+       {
+               av_freep( &st->codec->stats_in );
                avcodec_close(st->codec);
+       }
 }
 
 static inline long time_difference( struct timeval *time1 )
@@ -761,16 +1051,29 @@ static inline long time_difference( struct timeval *time1 )
        return time2.tv_sec * 1000000 + time2.tv_usec - time1->tv_sec * 1000000 - time1->tv_usec;
 }
 
+static int mlt_write(void *h, uint8_t *buf, int size)
+{
+       mlt_properties properties = (mlt_properties) h;
+       mlt_events_fire( properties, "avformat-write", buf, size, NULL );
+       return 0;
+}
+
+static void write_transmitter( mlt_listener listener, mlt_properties owner, mlt_service service, void **args )
+{
+       listener( owner, service, (uint8_t*) args[0], (int) args[1] );
+}
+
+
 /** The main thread - the argument is simply the consumer.
 */
 
 static void *consumer_thread( void *arg )
 {
        // Map the argument to the object
-       mlt_consumer this = arg;
+       mlt_consumer consumer = arg;
 
        // Get the properties
-       mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
+       mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 
        // Get the terminate on pause property
        int terminate_on_pause = mlt_properties_get_int( properties, "terminate_on_pause" );
@@ -792,20 +1095,20 @@ static void *consumer_thread( void *arg )
        int img_height = height;
 
        // Get default audio properties
-       mlt_audio_format aud_fmt = mlt_audio_s16;
        int channels = mlt_properties_get_int( properties, "channels" );
+       int total_channels = channels;
        int frequency = mlt_properties_get_int( properties, "frequency" );
-       int16_t *pcm = NULL;
+       void *pcm = NULL;
        int samples = 0;
 
        // AVFormat audio buffer and frame size
-       int audio_outbuf_size = ( 1024 * 42 );
+       int audio_outbuf_size = AUDIO_BUFFER_SIZE;
        uint8_t *audio_outbuf = av_malloc( audio_outbuf_size );
        int audio_input_frame_size = 0;
 
        // AVFormat video buffer and frame count
        int frame_count = 0;
-       int video_outbuf_size = ( 1024 * 1024 );
+       int video_outbuf_size = VIDEO_BUFFER_SIZE;
        uint8_t *video_outbuf = av_malloc( video_outbuf_size );
 
        // Used for the frame properties
@@ -825,7 +1128,8 @@ static void *consumer_thread( void *arg )
        mlt_image_format img_fmt = mlt_image_yuv422;
 
        // For receiving audio samples back from the fifo
-       int16_t *buffer = av_malloc( 48000 * 2 );
+       uint8_t *audio_buf_1 = av_malloc( AUDIO_ENCODE_BUFFER_SIZE );
+       uint8_t *audio_buf_2 = NULL;
        int count = 0;
 
        // Allocate the context
@@ -836,17 +1140,14 @@ static void *consumer_thread( void *arg )
 #endif
 
        // Streams
-       AVStream *audio_st = NULL;
        AVStream *video_st = NULL;
+       AVStream *audio_st[ MAX_AUDIO_STREAMS ];
 
        // Time stamps
        double audio_pts = 0;
        double video_pts = 0;
 
-       // Loop variable
-       int i;
-
-       // Frames despatched
+       // Frames dispatched
        long int frames = 0;
        long int total_time = 0;
 
@@ -856,22 +1157,45 @@ static void *consumer_thread( void *arg )
        char *format = mlt_properties_get( properties, "f" );
        char *vcodec = mlt_properties_get( properties, "vcodec" );
        char *acodec = mlt_properties_get( properties, "acodec" );
+       AVCodec *audio_codec = NULL;
+       AVCodec *video_codec = NULL;
        
        // Used to store and override codec ids
        int audio_codec_id;
        int video_codec_id;
 
+       // Misc
+       char key[27];
+       mlt_properties frame_meta_properties = mlt_properties_new();
+
+       // Initialize audio_st
+       int i = MAX_AUDIO_STREAMS;
+       while ( i-- )
+               audio_st[i] = NULL;
+
        // Check for user selected format first
        if ( format != NULL )
+#if LIBAVFORMAT_VERSION_INT < ((52<<16)+(45<<8)+0)
                fmt = guess_format( format, NULL, NULL );
+#else
+               fmt = av_guess_format( format, NULL, NULL );
+#endif
 
        // Otherwise check on the filename
        if ( fmt == NULL && filename != NULL )
+#if LIBAVFORMAT_VERSION_INT < ((52<<16)+(45<<8)+0)
                fmt = guess_format( NULL, filename, NULL );
+#else
+               fmt = av_guess_format( NULL, filename, NULL );
+#endif
 
        // Otherwise default to mpeg
        if ( fmt == NULL )
+#if LIBAVFORMAT_VERSION_INT < ((52<<16)+(45<<8)+0)
                fmt = guess_format( "mpeg", NULL, NULL );
+#else
+               fmt = av_guess_format( "mpeg", NULL, NULL );
+#endif
 
        // We need a filename - default to stdout?
        if ( filename == NULL || !strcmp( filename, "" ) )
@@ -886,11 +1210,30 @@ static void *consumer_thread( void *arg )
                audio_codec_id = CODEC_ID_NONE;
        else if ( acodec )
        {
-               AVCodec *p = avcodec_find_encoder_by_name( acodec );
-               if ( p != NULL )
-                       audio_codec_id = p->id;
+               audio_codec = avcodec_find_encoder_by_name( acodec );
+               if ( audio_codec )
+               {
+                       audio_codec_id = audio_codec->id;
+                       if ( audio_codec_id == CODEC_ID_AC3 && avcodec_find_encoder_by_name( "ac3_fixed" ) )
+                       {
+                               mlt_properties_set( properties, "_acodec", "ac3_fixed" );
+                               acodec = mlt_properties_get( properties, "_acodec" );
+                               audio_codec = avcodec_find_encoder_by_name( acodec );
+                       }
+                       else if ( !strcmp( acodec, "aac" ) )
+                       {
+                               mlt_properties_set( properties, "astrict", "experimental" );
+                       }
+               }
                else
-                       mlt_log_warning( MLT_CONSUMER_SERVICE( this ), "audio codec %s unrecognised - ignoring\n", acodec );
+               {
+                       audio_codec_id = CODEC_ID_NONE;
+                       mlt_log_warning( MLT_CONSUMER_SERVICE( consumer ), "audio codec %s unrecognised - ignoring\n", acodec );
+               }
+       }
+       else
+       {
+               audio_codec = avcodec_find_encoder( audio_codec_id );
        }
 
        // Check for video codec overides
@@ -898,14 +1241,49 @@ static void *consumer_thread( void *arg )
                video_codec_id = CODEC_ID_NONE;
        else if ( vcodec )
        {
-               AVCodec *p = avcodec_find_encoder_by_name( vcodec );
-               if ( p != NULL )
-                       video_codec_id = p->id;
+               video_codec = avcodec_find_encoder_by_name( vcodec );
+               if ( video_codec )
+               {
+                       video_codec_id = video_codec->id;
+               }
                else
-                       mlt_log_warning( MLT_CONSUMER_SERVICE( this ), "video codec %s unrecognised - ignoring\n", vcodec );
+               {
+                       video_codec_id = CODEC_ID_NONE;
+                       mlt_log_warning( MLT_CONSUMER_SERVICE( consumer ), "video codec %s unrecognised - ignoring\n", vcodec );
+               }
+       }
+       else
+       {
+               video_codec = avcodec_find_encoder( video_codec_id );
        }
 
        // Write metadata
+#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(31<<8)+0)
+       for ( i = 0; i < mlt_properties_count( properties ); i++ )
+       {
+               char *name = mlt_properties_get_name( properties, i );
+               if ( name && !strncmp( name, "meta.attr.", 10 ) )
+               {
+                       char *key = strdup( name + 10 );
+                       char *markup = strrchr( key, '.' );
+                       if ( markup && !strcmp( markup, ".markup") )
+                       {
+                               markup[0] = '\0';
+                               if ( !strstr( key, ".stream." ) )
+#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(43<<8)+0)
+#if LIBAVUTIL_VERSION_INT >= ((51<<16)+(8<<8)+0)
+                                       av_dict_set( &oc->metadata, key, mlt_properties_get_value( properties, i ), 0 );
+#else
+                                       av_metadata_set2( &oc->metadata, key, mlt_properties_get_value( properties, i ), 0 );
+#endif
+#else
+                                       av_metadata_set( &oc->metadata, key, mlt_properties_get_value( properties, i ) );
+#endif
+                       }
+                       free( key );
+               }
+       }
+#else
        char *tmp = NULL;
        int metavalue;
 
@@ -929,75 +1307,186 @@ static void *consumer_thread( void *arg )
 
        metavalue = mlt_properties_get_int( properties, "meta.attr.track.markup");
        if (metavalue != 0) oc->track = metavalue;
+#endif
 
        oc->oformat = fmt;
        snprintf( oc->filename, sizeof(oc->filename), "%s", filename );
 
-       // Add audio and video streams 
+       // Get a frame now, so we can set some AVOptions from properties.
+       frame = mlt_consumer_rt_frame( consumer );
+
+       // Set the timecode from the MLT metadata if available.
+    if ( frame )
+    {
+        const char *timecode = mlt_properties_get( MLT_FRAME_PROPERTIES(frame), "meta.attr.vitc.markup" );
+        if ( timecode && strcmp( timecode, "" ) )
+        {
+            mlt_properties_set( properties, "timecode", timecode );
+            if ( strchr( timecode, ';' ) )
+                mlt_properties_set_int( properties, "drop_frame_timecode", 1 );
+        }
+    }
+
+       // Add audio and video streams
        if ( video_codec_id != CODEC_ID_NONE )
-               video_st = add_video_stream( this, oc, video_codec_id );
+               video_st = add_video_stream( consumer, oc, video_codec );
        if ( audio_codec_id != CODEC_ID_NONE )
-               audio_st = add_audio_stream( this, oc, audio_codec_id );
+       {
+               int is_multi = 0;
+
+               total_channels = 0;
+               // multitrack audio
+               for ( i = 0; i < MAX_AUDIO_STREAMS; i++ )
+               {
+                       sprintf( key, "channels.%d", i );
+                       int j = mlt_properties_get_int( properties, key );
+                       if ( j )
+                       {
+                               is_multi = 1;
+                               total_channels += j;
+                               audio_st[i] = add_audio_stream( consumer, oc, audio_codec, j );
+                       }
+               }
+               // single track
+               if ( !is_multi )
+               {
+                       audio_st[0] = add_audio_stream( consumer, oc, audio_codec, channels );
+                       total_channels = channels;
+               }
+       }
+       mlt_properties_set_int( properties, "channels", total_channels );
+
+       // Audio format is determined when adding the audio stream
+       mlt_audio_format aud_fmt = mlt_audio_none;
+       if ( audio_st[0] )
+               aud_fmt = get_mlt_audio_format( audio_st[0]->codec->sample_fmt );
+       int sample_bytes = mlt_audio_format_size( aud_fmt, 1, 1 );
+       sample_bytes = sample_bytes ? sample_bytes : 1; // prevent divide by zero
 
        // Set the parameters (even though we have none...)
-       if ( av_set_parameters(oc, NULL) >= 0 ) 
+#if LIBAVFORMAT_VERSION_INT < ((53<<16)+(2<<8)+0)
+       if ( av_set_parameters(oc, NULL) >= 0 )
+#endif
        {
+#if LIBAVFORMAT_VERSION_MAJOR >= 53
+               if ( mlt_properties_get( properties, "muxpreload" ) && ! mlt_properties_get( properties, "preload" ) )
+                       mlt_properties_set_double( properties, "preload", mlt_properties_get_double( properties, "muxpreload" ) );
+#else
                oc->preload = ( int )( mlt_properties_get_double( properties, "muxpreload" ) * AV_TIME_BASE );
+#endif
                oc->max_delay= ( int )( mlt_properties_get_double( properties, "muxdelay" ) * AV_TIME_BASE );
 
                // Process properties as AVOptions
+               char *fpre = mlt_properties_get( properties, "fpre" );
+               if ( fpre )
+               {
+                       mlt_properties p = mlt_properties_load( fpre );
+                       apply_properties( oc, p, AV_OPT_FLAG_ENCODING_PARAM );
+#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(110<<8)+0)
+                       if ( oc->oformat && oc->oformat->priv_class && oc->priv_data )
+                               apply_properties( oc->priv_data, p, AV_OPT_FLAG_ENCODING_PARAM );
+#endif
+                       mlt_properties_close( p );
+               }
                apply_properties( oc, properties, AV_OPT_FLAG_ENCODING_PARAM );
+#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(110<<8)+0)
+               if ( oc->oformat && oc->oformat->priv_class && oc->priv_data )
+                       apply_properties( oc->priv_data, properties, AV_OPT_FLAG_ENCODING_PARAM );
+#endif
 
-               if ( video_st && !open_video( oc, video_st ) )
+               if ( video_st && !open_video( properties, oc, video_st, vcodec? vcodec : NULL ) )
                        video_st = NULL;
-               if ( audio_st )
+               for ( i = 0; i < MAX_AUDIO_STREAMS && audio_st[i]; i++ )
                {
-                       audio_input_frame_size = open_audio( oc, audio_st, audio_outbuf_size );
+                       audio_input_frame_size = open_audio( properties, oc, audio_st[i], audio_outbuf_size,
+                               acodec? acodec : NULL );
                        if ( !audio_input_frame_size )
-                               audio_st = NULL;
+                               audio_st[i] = NULL;
                }
 
+               // Setup custom I/O if redirecting
+               if ( mlt_properties_get_int( properties, "redirect" ) )
+               {
+                       int buffer_size = 32768;
+                       unsigned char *buffer = av_malloc( buffer_size );
+#if LIBAVFORMAT_VERSION_MAJOR >= 53
+                       AVIOContext* io = avio_alloc_context( buffer, buffer_size, 1, properties, NULL, mlt_write, NULL );
+#else
+                       ByteIOContext* io = av_alloc_put_byte( buffer, buffer_size, 1, properties, NULL, mlt_write, NULL );
+#endif
+                       if ( buffer && io )
+                       {
+                               oc->pb = io;
+#if LIBAVFORMAT_VERSION_MAJOR >= 53
+                               oc->flags |= AVFMT_FLAG_CUSTOM_IO;
+#endif
+                               mlt_properties_set_data( properties, "avio_buffer", buffer, buffer_size, av_free, NULL );
+                               mlt_properties_set_data( properties, "avio_context", io, 0, av_free, NULL );
+                               mlt_events_register( properties, "avformat-write", (mlt_transmitter) write_transmitter );
+                       }
+                       else
+                       {
+                               av_free( buffer );
+                               mlt_log_error( MLT_CONSUMER_SERVICE(consumer), "failed to setup output redirection\n" );
+                       }
+               }
                // Open the output file, if needed
-               if ( !( fmt->flags & AVFMT_NOFILE ) ) 
+               else if ( !( fmt->flags & AVFMT_NOFILE ) )
                {
-                       if ( url_fopen( &oc->pb, filename, URL_WRONLY ) < 0 ) 
+#if LIBAVFORMAT_VERSION_MAJOR >= 53
+                       if ( avio_open( &oc->pb, filename, AVIO_FLAG_WRITE ) < 0 )
+#else
+                       if ( url_fopen( &oc->pb, filename, URL_WRONLY ) < 0 )
+#endif
                        {
-                               mlt_log_error( MLT_CONSUMER_SERVICE( this ), "Could not open '%s'\n", filename );
-                               mlt_properties_set_int( properties, "running", 0 );
+                               mlt_log_error( MLT_CONSUMER_SERVICE( consumer ), "Could not open '%s'\n", filename );
+                               mlt_events_fire( properties, "consumer-fatal-error", NULL );
+                               goto on_fatal_error;
                        }
                }
        
-               // Write the stream header, if any
+               // Write the stream header.
                if ( mlt_properties_get_int( properties, "running" ) )
+#if LIBAVFORMAT_VERSION_INT >= ((53<<16)+(2<<8)+0)
+                       avformat_write_header( oc, NULL );
+#else
                        av_write_header( oc );
+#endif
        }
+#if LIBAVFORMAT_VERSION_INT < ((53<<16)+(2<<8)+0)
        else
        {
-               mlt_log_error( MLT_CONSUMER_SERVICE( this ), "Invalid output format parameters\n" );
-               mlt_properties_set_int( properties, "running", 0 );
+               mlt_log_error( MLT_CONSUMER_SERVICE( consumer ), "Invalid output format parameters\n" );
+               mlt_events_fire( properties, "consumer-fatal-error", NULL );
+               goto on_fatal_error;
        }
+#endif
 
        // Allocate picture
        if ( video_st )
                output = alloc_picture( video_st->codec->pix_fmt, width, height );
 
        // Last check - need at least one stream
-       if ( audio_st == NULL && video_st == NULL )
-               mlt_properties_set_int( properties, "running", 0 );
+       if ( !audio_st[0] && !video_st )
+       {
+               mlt_events_fire( properties, "consumer-fatal-error", NULL );
+               goto on_fatal_error;
+       }
 
        // Get the starting time (can ignore the times above)
        gettimeofday( &ante, NULL );
 
        // Loop while running
-       while( mlt_properties_get_int( properties, "running" ) && !terminated )
+       while( mlt_properties_get_int( properties, "running" ) &&
+              ( !terminated || ( video_st && mlt_deque_count( queue ) ) ) )
        {
-               // Get the frame
-               frame = mlt_consumer_rt_frame( this );
+               if ( !frame )
+                       frame = mlt_consumer_rt_frame( consumer );
 
                // Check that we have a frame to work with
                if ( frame != NULL )
                {
-                       // Increment frames despatched
+                       // Increment frames dispatched
                        frames ++;
 
                        // Default audio args
@@ -1007,10 +1496,14 @@ static void *consumer_thread( void *arg )
                        terminated = terminate_on_pause && mlt_properties_get_double( frame_properties, "_speed" ) == 0.0;
 
                        // Get audio and append to the fifo
-                       if ( !terminated && audio_st )
+                       if ( !terminated && audio_st[0] )
                        {
                                samples = mlt_sample_calculator( fps, frequency, count ++ );
-                               mlt_frame_get_audio( frame, (void**) &pcm, &aud_fmt, &frequency, &channels, &samples );
+                               channels = total_channels;
+                               mlt_frame_get_audio( frame, &pcm, &aud_fmt, &frequency, &channels, &samples );
+
+                               // Save the audio channel remap properties for later
+                               mlt_properties_pass( frame_meta_properties, frame_properties, "meta.map.audio." );
 
                                // Create the fifo if we don't have one
                                if ( fifo == NULL )
@@ -1018,13 +1511,18 @@ static void *consumer_thread( void *arg )
                                        fifo = sample_fifo_init( frequency, channels );
                                        mlt_properties_set_data( properties, "sample_fifo", fifo, 0, ( mlt_destructor )sample_fifo_close, NULL );
                                }
+                               if ( pcm )
+                               {
+                                       // Silence if not normal forward speed
+                                       if ( mlt_properties_get_double( frame_properties, "_speed" ) != 1.0 )
+                                               memset( pcm, 0, samples * channels * sample_bytes );
 
-                               if ( mlt_properties_get_double( frame_properties, "_speed" ) != 1.0 )
-                                       memset( pcm, 0, samples * channels * 2 );
-
-                               // Append the samples
-                               sample_fifo_append( fifo, pcm, samples * channels );
-                               total_time += ( samples * 1000000 ) / frequency;
+                                       // Append the samples
+                                       sample_fifo_append( fifo, pcm, samples * channels * sample_bytes );
+                                       total_time += ( samples * 1000000 ) / frequency;
+                               }
+                               if ( !video_st )
+                                       mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
                        }
 
                        // Encode the image
@@ -1032,44 +1530,148 @@ static void *consumer_thread( void *arg )
                                mlt_deque_push_back( queue, frame );
                        else
                                mlt_frame_close( frame );
+                       frame = NULL;
                }
 
                // While we have stuff to process, process...
                while ( 1 )
                {
                        // Write interleaved audio and video frames
-                       if ( !video_st || ( video_st && audio_st && audio_pts < video_pts ) )
+                       if ( !video_st || ( video_st && audio_st[0] && audio_pts < video_pts ) )
                        {
-                               if ( ( channels * audio_input_frame_size ) < sample_fifo_used( fifo ) )
+                               // Write audio
+                               if ( ( video_st && terminated ) || ( channels * audio_input_frame_size ) < sample_fifo_used( fifo ) / sample_bytes )
                                {
-                                       AVCodecContext *c;
-                                       AVPacket pkt;
-                                       av_init_packet( &pkt );
-
-                                       c = audio_st->codec;
+                                       int j = 0; // channel offset into interleaved source buffer
+                                       int n = FFMIN( FFMIN( channels * audio_input_frame_size, sample_fifo_used( fifo ) / sample_bytes ), AUDIO_ENCODE_BUFFER_SIZE );
 
-                                       sample_fifo_fetch( fifo, buffer, channels * audio_input_frame_size );
-
-                                       pkt.size = avcodec_encode_audio( c, audio_outbuf, audio_outbuf_size, buffer );
-                                       // Write the compressed frame in the media file
-                                       if ( c->coded_frame && c->coded_frame->pts != AV_NOPTS_VALUE )
+                                       // Get the audio samples
+                                       if ( n > 0 )
+                                       {
+                                               sample_fifo_fetch( fifo, audio_buf_1, n * sample_bytes );
+                                       }
+                                       else if ( audio_codec_id == CODEC_ID_VORBIS && terminated )
+                                       {
+                                               // This prevents an infinite loop when some versions of vorbis do not
+                                               // increment pts when encoding silence.
+                                               audio_pts = video_pts;
+                                               break;
+                                       }
+                                       else
                                        {
-                                               pkt.pts = av_rescale_q( c->coded_frame->pts, c->time_base, audio_st->time_base );
-                                               mlt_log_debug( MLT_CONSUMER_SERVICE( this ), "audio pkt pts %lld frame pts %lld", pkt.pts, c->coded_frame->pts );
+                                               memset( audio_buf_1, 0, AUDIO_ENCODE_BUFFER_SIZE );
                                        }
-                                       pkt.flags |= PKT_FLAG_KEY;
-                                       pkt.stream_index= audio_st->index;
-                                       pkt.data= audio_outbuf;
+                                       samples = n / channels;
 
-                                       if ( pkt.size > 0 )
-                                               if ( av_interleaved_write_frame( oc, &pkt ) != 0 )
-                                                       mlt_log_error( MLT_CONSUMER_SERVICE( this ), "error writing audio frame\n" );
+                                       // For each output stream
+                                       for ( i = 0; i < MAX_AUDIO_STREAMS && audio_st[i] && j < total_channels; i++ )
+                                       {
+                                               AVStream *stream = audio_st[i];
+                                               AVCodecContext *codec = stream->codec;
+                                               AVPacket pkt;
 
-                                       mlt_log_debug( MLT_CONSUMER_SERVICE( this ), " frame_size %d\n", c->frame_size );
-                                       if ( audio_codec_id == CODEC_ID_VORBIS )
-                                               audio_pts = (double)c->coded_frame->pts * av_q2d( audio_st->time_base );
-                                       else
-                                               audio_pts = (double)audio_st->pts.val * av_q2d( audio_st->time_base );
+                                               av_init_packet( &pkt );
+
+                                               // Optimized for single track and no channel remap
+                                               if ( !audio_st[1] && !mlt_properties_count( frame_meta_properties ) )
+                                               {
+                                                       pkt.size = avcodec_encode_audio( codec, audio_outbuf, audio_outbuf_size, (short*) audio_buf_1 );
+                                               }
+                                               else
+                                               {
+                                                       // Extract the audio channels according to channel mapping
+                                                       int dest_offset = 0; // channel offset into interleaved dest buffer
+
+                                                       // Get the number of channels for this stream
+                                                       sprintf( key, "channels.%d", i );
+                                                       int current_channels = mlt_properties_get_int( properties, key );
+
+                                                       // Clear the destination audio buffer.
+                                                       if ( !audio_buf_2 )
+                                                               audio_buf_2 = av_mallocz( AUDIO_ENCODE_BUFFER_SIZE );
+                                                       else
+                                                               memset( audio_buf_2, 0, AUDIO_ENCODE_BUFFER_SIZE );
+
+                                                       // For each output channel
+                                                       while ( dest_offset < current_channels && j < total_channels )
+                                                       {
+                                                               int map_start = -1, map_channels = 0;
+                                                               int source_offset = 0;
+                                                               int k;
+
+                                                               // Look for a mapping that starts at j
+                                                               for ( k = 0; k < (MAX_AUDIO_STREAMS * 2) && map_start != j; k++ )
+                                                               {
+                                                                       sprintf( key, "%d.channels", k );
+                                                                       map_channels = mlt_properties_get_int( frame_meta_properties, key );
+                                                                       sprintf( key, "%d.start", k );
+                                                                       if ( mlt_properties_get( frame_meta_properties, key ) )
+                                                                               map_start = mlt_properties_get_int( frame_meta_properties, key );
+                                                                       if ( map_start != j )
+                                                                               source_offset += map_channels;
+                                                               }
+
+                                                               // If no mapping
+                                                               if ( map_start != j )
+                                                               {
+                                                                       map_channels = current_channels;
+                                                                       source_offset = j;
+                                                               }
+
+                                                               // Copy samples if source offset valid
+                                                               if ( source_offset < channels )
+                                                               {
+                                                                       // Interleave the audio buffer with the # channels for this stream/mapping.
+                                                                       for ( k = 0; k < map_channels; k++, j++, source_offset++, dest_offset++ )
+                                                                       {
+                                                                               void *src = audio_buf_1 + source_offset * sample_bytes;
+                                                                               void *dest = audio_buf_2 + dest_offset * sample_bytes;
+                                                                               int s = samples + 1;
+
+                                                                               while ( --s ) {
+                                                                                       memcpy( dest, src, sample_bytes );
+                                                                                       dest += current_channels * sample_bytes;
+                                                                                       src += channels * sample_bytes;
+                                                                               }
+                                                                       }
+                                                               }
+                                                               // Otherwise silence
+                                                               else
+                                                               {
+                                                                       j += current_channels;
+                                                                       dest_offset += current_channels;
+                                                               }
+                                                       }
+                                                       pkt.size = avcodec_encode_audio( codec, audio_outbuf, audio_outbuf_size, (short*) audio_buf_2 );
+                                               }
+
+                                               // Write the compressed frame in the media file
+                                               if ( codec->coded_frame && codec->coded_frame->pts != AV_NOPTS_VALUE )
+                                               {
+                                                       pkt.pts = av_rescale_q( codec->coded_frame->pts, codec->time_base, stream->time_base );
+                                                       mlt_log_debug( MLT_CONSUMER_SERVICE( consumer ), "audio stream %d pkt pts %"PRId64" frame pts %"PRId64,
+                                                               stream->index, pkt.pts, codec->coded_frame->pts );
+                                               }
+                                               pkt.flags |= PKT_FLAG_KEY;
+                                               pkt.stream_index = stream->index;
+                                               pkt.data = audio_outbuf;
+
+                                               if ( pkt.size > 0 )
+                                               {
+                                                       if ( av_interleaved_write_frame( oc, &pkt ) )
+                                                       {
+                                                               mlt_log_fatal( MLT_CONSUMER_SERVICE( consumer ), "error writing audio frame\n" );
+                                                               mlt_events_fire( properties, "consumer-fatal-error", NULL );
+                                                               goto on_fatal_error;
+                                                       }
+                                               }
+
+                                               mlt_log_debug( MLT_CONSUMER_SERVICE( consumer ), " frame_size %d\n", codec->frame_size );
+                                               if ( i == 0 )
+                                               {
+                                                       audio_pts = (double)stream->pts.val * av_q2d( stream->time_base );
+                                               }
+                                       }
                                }
                                else
                                {
@@ -1078,9 +1680,10 @@ static void *consumer_thread( void *arg )
                        }
                        else if ( video_st )
                        {
+                               // Write video
                                if ( mlt_deque_count( queue ) )
                                {
-                                       int out_size, ret;
+                                       int out_size, ret = 0;
                                        AVCodecContext *c;
 
                                        frame = mlt_deque_pop_front( queue );
@@ -1091,12 +1694,9 @@ static void *consumer_thread( void *arg )
                                        if ( mlt_properties_get_int( frame_properties, "rendered" ) )
                                        {
                                                int i = 0;
-                                               int j = 0;
                                                uint8_t *p;
                                                uint8_t *q;
 
-                                               mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
-
                                                mlt_frame_get_image( frame, &image, &img_fmt, &img_width, &img_height, 0 );
 
                                                q = image;
@@ -1105,25 +1705,30 @@ static void *consumer_thread( void *arg )
                                                for ( i = 0; i < height; i ++ )
                                                {
                                                        p = input->data[ 0 ] + i * input->linesize[ 0 ];
-                                                       j = width;
-                                                       while( j -- )
-                                                       {
-                                                               *p ++ = *q ++;
-                                                               *p ++ = *q ++;
-                                                       }
+                                                       memcpy( p, q, width * 2 );
+                                                       q += width * 2;
                                                }
 
                                                // Do the colour space conversion
 #ifdef SWSCALE
+                                               int flags = SWS_BICUBIC;
+#ifdef USE_MMX
+                                               flags |= SWS_CPU_CAPS_MMX;
+#endif
+#ifdef USE_SSE
+                                               flags |= SWS_CPU_CAPS_MMX2;
+#endif
                                                struct SwsContext *context = sws_getContext( width, height, PIX_FMT_YUYV422,
-                                                       width, height, video_st->codec->pix_fmt, SWS_FAST_BILINEAR, NULL, NULL, NULL);
-                                               sws_scale( context, input->data, input->linesize, 0, height,
+                                                       width, height, video_st->codec->pix_fmt, flags, NULL, NULL, NULL);
+                                               sws_scale( context, (const uint8_t* const*) input->data, input->linesize, 0, height,
                                                        output->data, output->linesize);
                                                sws_freeContext( context );
 #else
                                                img_convert( ( AVPicture * )output, video_st->codec->pix_fmt, ( AVPicture * )input, PIX_FMT_YUYV422, width, height );
 #endif
 
+                                               mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
+
                                                // Apply the alpha if applicable
                                                if ( video_st->codec->pix_fmt == PIX_FMT_RGB32 )
                                                {
@@ -1133,11 +1738,7 @@ static void *consumer_thread( void *arg )
                                                        for ( i = 0; i < height; i ++ )
                                                        {
                                                                n = ( width + 7 ) / 8;
-                                                               p = output->data[ 0 ] + i * output->linesize[ 0 ];
-
-                                                               #ifndef __DARWIN__
-                                                               p += 3;
-                                                               #endif
+                                                               p = output->data[ 0 ] + i * output->linesize[ 0 ] + 3;
 
                                                                switch( width % 8 )
                                                                {
@@ -1173,11 +1774,12 @@ static void *consumer_thread( void *arg )
                                        else 
                                        {
                                                // Set the quality
-                                               output->quality = video_st->quality;
+                                               output->quality = c->global_quality;
 
                                                // Set frame interlace hints
                                                output->interlaced_frame = !mlt_properties_get_int( frame_properties, "progressive" );
                                                output->top_field_first = mlt_properties_get_int( frame_properties, "top_field_first" );
+                                               output->pts = frame_count;
 
                                                // Encode the image
                                                out_size = avcodec_encode_video(c, video_outbuf, video_outbuf_size, output );
@@ -1190,7 +1792,7 @@ static void *consumer_thread( void *arg )
 
                                                        if ( c->coded_frame && c->coded_frame->pts != AV_NOPTS_VALUE )
                                                                pkt.pts= av_rescale_q( c->coded_frame->pts, c->time_base, video_st->time_base );
-                                                       mlt_log_debug( MLT_CONSUMER_SERVICE( this ), "video pkt pts %lld frame pts %lld", pkt.pts, c->coded_frame->pts );
+                                                       mlt_log_debug( MLT_CONSUMER_SERVICE( consumer ), "video pkt pts %"PRId64" frame pts %"PRId64, pkt.pts, c->coded_frame->pts );
                                                        if( c->coded_frame && c->coded_frame->key_frame )
                                                                pkt.flags |= PKT_FLAG_KEY;
                                                        pkt.stream_index= video_st->index;
@@ -1199,39 +1801,46 @@ static void *consumer_thread( void *arg )
 
                                                        // write the compressed frame in the media file
                                                        ret = av_interleaved_write_frame(oc, &pkt);
-                                                       mlt_log_debug( MLT_CONSUMER_SERVICE( this ), " frame_size %d\n", c->frame_size );
+                                                       mlt_log_debug( MLT_CONSUMER_SERVICE( consumer ), " frame_size %d\n", c->frame_size );
                                                        video_pts = (double)video_st->pts.val * av_q2d( video_st->time_base );
                                                        
                                                        // Dual pass logging
                                                        if ( mlt_properties_get_data( properties, "_logfile", NULL ) && c->stats_out )
                                                                fprintf( mlt_properties_get_data( properties, "_logfile", NULL ), "%s", c->stats_out );
                                                } 
-                                               else
+                                               else if ( out_size < 0 )
                                                {
-                                                       mlt_log_warning( MLT_CONSUMER_SERVICE( this ), "error with video encode\n" );
+                                                       mlt_log_warning( MLT_CONSUMER_SERVICE( consumer ), "error with video encode %d\n", frame_count );
                                                }
                                        }
                                        frame_count++;
+                                       if ( ret )
+                                       {
+                                               mlt_log_fatal( MLT_CONSUMER_SERVICE( consumer ), "error writing video frame\n" );
+                                               mlt_events_fire( properties, "consumer-fatal-error", NULL );
+                                               goto on_fatal_error;
+                                       }
                                        mlt_frame_close( frame );
+                                       frame = NULL;
                                }
                                else
                                {
                                        break;
                                }
                        }
-                       if ( audio_st )
-                               mlt_log_debug( MLT_CONSUMER_SERVICE( this ), "audio pts %lld (%f) ", audio_st->pts.val, audio_pts );
+                       if ( audio_st[0] )
+                               mlt_log_debug( MLT_CONSUMER_SERVICE( consumer ), "audio pts %"PRId64" (%f) ", audio_st[0]->pts.val, audio_pts );
                        if ( video_st )
-                               mlt_log_debug( MLT_CONSUMER_SERVICE( this ), "video pts %lld (%f) ", video_st->pts.val, video_pts );
-                       mlt_log_debug( MLT_CONSUMER_SERVICE( this ), "\n" );
+                               mlt_log_debug( MLT_CONSUMER_SERVICE( consumer ), "video pts %"PRId64" (%f) ", video_st->pts.val, video_pts );
+                       mlt_log_debug( MLT_CONSUMER_SERVICE( consumer ), "\n" );
                }
 
-               if ( real_time_output == 1 && frames % 12 == 0 )
+               if ( real_time_output == 1 && frames % 2 == 0 )
                {
                        long passed = time_difference( &ante );
                        if ( fifo != NULL )
                        {
-                               long pending = ( ( ( long )sample_fifo_used( fifo ) * 1000 ) / frequency ) * 1000;
+                               long pending = ( ( ( long )sample_fifo_used( fifo ) / sample_bytes * 1000 ) / frequency ) * 1000;
                                passed -= pending;
                        }
                        if ( passed < total_time )
@@ -1243,38 +1852,41 @@ static void *consumer_thread( void *arg )
                }
        }
 
-#ifdef FLUSH
-       if ( ! real_time_output )
+       // Flush the encoder buffers
+       if ( real_time_output <= 0 )
        {
                // Flush audio fifo
-               if ( audio_st && audio_st->codec->frame_size > 1 ) for (;;)
+               // TODO: flush all audio streams
+               if ( audio_st[0] && audio_st[0]->codec->frame_size > 1 ) for (;;)
                {
-                       AVCodecContext *c = audio_st->codec;
+                       AVCodecContext *c = audio_st[0]->codec;
                        AVPacket pkt;
                        av_init_packet( &pkt );
                        pkt.size = 0;
 
-                       if ( /*( c->capabilities & CODEC_CAP_SMALL_LAST_FRAME ) &&*/
-                               ( channels * audio_input_frame_size < sample_fifo_used( fifo ) ) )
+                       if ( fifo &&
+                               ( channels * audio_input_frame_size < sample_fifo_used( fifo ) / sample_bytes ) )
                        {
-                               sample_fifo_fetch( fifo, buffer, channels * audio_input_frame_size );
-                               pkt.size = avcodec_encode_audio( c, audio_outbuf, audio_outbuf_size, buffer );
+                               sample_fifo_fetch( fifo, audio_buf_1, channels * audio_input_frame_size * sample_bytes );
+                               pkt.size = avcodec_encode_audio( c, audio_outbuf, audio_outbuf_size, (short*) audio_buf_1 );
                        }
                        if ( pkt.size <= 0 )
                                pkt.size = avcodec_encode_audio( c, audio_outbuf, audio_outbuf_size, NULL );
+                       mlt_log_debug( MLT_CONSUMER_SERVICE( consumer ), "flushing audio size %d\n", pkt.size );
                        if ( pkt.size <= 0 )
                                break;
 
                        // Write the compressed frame in the media file
                        if ( c->coded_frame && c->coded_frame->pts != AV_NOPTS_VALUE )
-                               pkt.pts = av_rescale_q( c->coded_frame->pts, c->time_base, audio_st->time_base );
+                               pkt.pts = av_rescale_q( c->coded_frame->pts, c->time_base, audio_st[0]->time_base );
                        pkt.flags |= PKT_FLAG_KEY;
-                       pkt.stream_index = audio_st->index;
+                       pkt.stream_index = audio_st[0]->index;
                        pkt.data = audio_outbuf;
                        if ( av_interleaved_write_frame( oc, &pkt ) != 0 )
                        {
-                               fprintf( stderr, "%s: Error while writing flushed audio frame\n", __FILE__ );
-                               break;
+                               mlt_log_fatal( MLT_CONSUMER_SERVICE( consumer ), "error writing flushed audio frame\n" );
+                               mlt_events_fire( properties, "consumer-fatal-error", NULL );
+                               goto on_fatal_error;
                        }
                }
 
@@ -1287,6 +1899,7 @@ static void *consumer_thread( void *arg )
 
                        // Encode the image
                        pkt.size = avcodec_encode_video( c, video_outbuf, video_outbuf_size, NULL );
+                       mlt_log_debug( MLT_CONSUMER_SERVICE( consumer ), "flushing video size %d\n", pkt.size );
                        if ( pkt.size <= 0 )
                                break;
 
@@ -1300,33 +1913,44 @@ static void *consumer_thread( void *arg )
                        // write the compressed frame in the media file
                        if ( av_interleaved_write_frame( oc, &pkt ) != 0 )
                        {
-                               fprintf( stderr, "%s: Error while writing flushed video frame\n". __FILE__ );
-                               break;
+                               mlt_log_fatal( MLT_CONSUMER_SERVICE(consumer), "error writing flushed video frame\n" );
+                               mlt_events_fire( properties, "consumer-fatal-error", NULL );
+                               goto on_fatal_error;
                        }
+                       // Dual pass logging
+                       if ( mlt_properties_get_data( properties, "_logfile", NULL ) && c->stats_out )
+                               fprintf( mlt_properties_get_data( properties, "_logfile", NULL ), "%s", c->stats_out );
                }
        }
-#endif
+
+on_fatal_error:
+       
+       // Write the trailer, if any
+       if ( frames )
+               av_write_trailer( oc );
 
        // close each codec
-       if (video_st)
+       if ( video_st )
                close_video(oc, video_st);
-       if (audio_st)
-               close_audio(oc, audio_st);
-
-       // Write the trailer, if any
-       av_write_trailer(oc);
+       for ( i = 0; i < MAX_AUDIO_STREAMS && audio_st[i]; i++ )
+               close_audio( oc, audio_st[i] );
 
        // Free the streams
-       for(i = 0; i < oc->nb_streams; i++)
-               av_freep(&oc->streams[i]);
+       for ( i = 0; i < oc->nb_streams; i++ )
+               av_freep( &oc->streams[i] );
 
        // Close the output file
-       if (!(fmt->flags & AVFMT_NOFILE))
-#if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(0<<8)+0)
-               url_fclose(oc->pb);
+       if ( !( fmt->flags & AVFMT_NOFILE ) &&
+               !mlt_properties_get_int( properties, "redirect" ) )
+       {
+#if LIBAVFORMAT_VERSION_MAJOR >= 53
+               if ( oc->pb  ) avio_close( oc->pb );
+#elif LIBAVFORMAT_VERSION_MAJOR >= 52
+               if ( oc->pb  ) url_fclose( oc->pb );
 #else
-               url_fclose(&oc->pb);
+               url_fclose( &oc->pb );
 #endif
+       }
 
        // Clean up input and output frames
        if ( output )
@@ -1335,17 +1959,17 @@ static void *consumer_thread( void *arg )
        av_free( input->data[0] );
        av_free( input );
        av_free( video_outbuf );
-       av_free( buffer );
+       av_free( audio_buf_1 );
+       av_free( audio_buf_2 );
 
        // Free the stream
-       av_free(oc);
+       av_free( oc );
 
        // Just in case we terminated on pause
-       mlt_properties_set_int( properties, "running", 0 );
+       mlt_consumer_stopped( consumer );
+       mlt_properties_close( frame_meta_properties );
 
-       mlt_consumer_stopped( this );
-
-       if ( mlt_properties_get_int( properties, "pass" ) == 2 )
+       if ( mlt_properties_get_int( properties, "pass" ) > 1 )
        {
                // Remove the dual pass log file
                if ( mlt_properties_get( properties, "_logfilename" ) )
@@ -1372,20 +1996,23 @@ static void *consumer_thread( void *arg )
                remove( "x264_2pass.log.temp" );
        }
 
+       while ( ( frame = mlt_deque_pop_back( queue ) ) )
+               mlt_frame_close( frame );
+
        return NULL;
 }
 
 /** Close the consumer.
 */
 
-static void consumer_close( mlt_consumer this )
+static void consumer_close( mlt_consumer consumer )
 {
        // Stop the consumer
-       mlt_consumer_stop( this );
+       mlt_consumer_stop( consumer );
 
        // Close the parent
-       mlt_consumer_close( this );
+       mlt_consumer_close( consumer );
 
        // Free the memory
-       free( this );
+       free( consumer );
 }