/*
- * Libavformat API example: Output a media file in any supported
- * libavformat format. The default codecs are used.
- *
* Copyright (c) 2003 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
+
+/**
+ * @file
+ * libavformat API example.
+ *
+ * @example libavformat/output-example.c
+ * Output a media file in any supported libavformat format.
+ * The default codecs are used.
+ */
+
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
+#include "libavutil/mathematics.h"
#include "libavformat/avformat.h"
#include "libswscale/swscale.h"
/**************************************************************/
/* audio output */
-float t, tincr, tincr2;
-int16_t *samples;
-uint8_t *audio_outbuf;
-int audio_outbuf_size;
-int audio_input_frame_size;
+static float t, tincr, tincr2;
+static int16_t *samples;
+static int audio_input_frame_size;
/*
* add an audio output stream
{
AVCodecContext *c;
AVStream *st;
+ AVCodec *codec;
+
+ /* find the audio encoder */
+ codec = avcodec_find_encoder(codec_id);
+ if (!codec) {
+ fprintf(stderr, "codec not found\n");
+ exit(1);
+ }
- st = av_new_stream(oc, 1);
+ st = avformat_new_stream(oc, codec);
if (!st) {
fprintf(stderr, "Could not alloc stream\n");
exit(1);
}
c = st->codec;
- c->codec_id = codec_id;
- c->codec_type = AVMEDIA_TYPE_AUDIO;
/* put sample parameters */
c->sample_fmt = AV_SAMPLE_FMT_S16;
static void open_audio(AVFormatContext *oc, AVStream *st)
{
AVCodecContext *c;
- AVCodec *codec;
c = st->codec;
- /* find the audio encoder */
- codec = avcodec_find_encoder(c->codec_id);
- if (!codec) {
- fprintf(stderr, "codec not found\n");
- exit(1);
- }
-
/* open it */
- if (avcodec_open(c, codec) < 0) {
+ if (avcodec_open2(c, NULL, NULL) < 0) {
fprintf(stderr, "could not open codec\n");
exit(1);
}
/* increment frequency by 110 Hz per second */
tincr2 = 2 * M_PI * 110.0 / c->sample_rate / c->sample_rate;
- audio_outbuf_size = 10000;
- audio_outbuf = av_malloc(audio_outbuf_size);
-
- /* ugly hack for PCM codecs (will be removed ASAP with new PCM
- support to compute the input frame size in samples */
- if (c->frame_size <= 1) {
- audio_input_frame_size = audio_outbuf_size / c->channels;
- switch(st->codec->codec_id) {
- case CODEC_ID_PCM_S16LE:
- case CODEC_ID_PCM_S16BE:
- case CODEC_ID_PCM_U16LE:
- case CODEC_ID_PCM_U16BE:
- audio_input_frame_size >>= 1;
- break;
- default:
- break;
- }
- } else {
+ if (c->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)
+ audio_input_frame_size = 10000;
+ else
audio_input_frame_size = c->frame_size;
- }
- samples = av_malloc(audio_input_frame_size * 2 * c->channels);
+ samples = av_malloc(audio_input_frame_size * av_get_bytes_per_sample(c->sample_fmt)
+ * c->channels);
}
/* prepare a 16 bit dummy audio frame of 'frame_size' samples and
{
AVCodecContext *c;
AVPacket pkt;
- av_init_packet(&pkt);
+ AVFrame *frame = avcodec_alloc_frame();
+ int got_packet;
+ av_init_packet(&pkt);
c = st->codec;
get_audio_frame(samples, audio_input_frame_size, c->channels);
+ frame->nb_samples = audio_input_frame_size;
+ avcodec_fill_audio_frame(frame, c->channels, c->sample_fmt, (uint8_t *)samples,
+ audio_input_frame_size * av_get_bytes_per_sample(c->sample_fmt)
+ * c->channels, 1);
- pkt.size= avcodec_encode_audio(c, audio_outbuf, audio_outbuf_size, samples);
+ avcodec_encode_audio2(c, &pkt, frame, &got_packet);
+ if (!got_packet)
+ return;
- if (c->coded_frame && c->coded_frame->pts != AV_NOPTS_VALUE)
- pkt.pts= av_rescale_q(c->coded_frame->pts, c->time_base, st->time_base);
- pkt.flags |= AV_PKT_FLAG_KEY;
pkt.stream_index= st->index;
- pkt.data= audio_outbuf;
/* write the compressed frame in the media file */
if (av_interleaved_write_frame(oc, &pkt) != 0) {
avcodec_close(st->codec);
av_free(samples);
- av_free(audio_outbuf);
}
/**************************************************************/
/* video output */
-AVFrame *picture, *tmp_picture;
-uint8_t *video_outbuf;
-int frame_count, video_outbuf_size;
+static AVFrame *picture, *tmp_picture;
+static uint8_t *video_outbuf;
+static int frame_count, video_outbuf_size;
/* add a video output stream */
static AVStream *add_video_stream(AVFormatContext *oc, enum CodecID codec_id)
{
AVCodecContext *c;
AVStream *st;
+ AVCodec *codec;
+
+ /* find the video encoder */
+ codec = avcodec_find_encoder(codec_id);
+ if (!codec) {
+ fprintf(stderr, "codec not found\n");
+ exit(1);
+ }
- st = av_new_stream(oc, 0);
+ st = avformat_new_stream(oc, codec);
if (!st) {
fprintf(stderr, "Could not alloc stream\n");
exit(1);
}
c = st->codec;
- c->codec_id = codec_id;
- c->codec_type = AVMEDIA_TYPE_VIDEO;
/* put sample parameters */
c->bit_rate = 400000;
static void open_video(AVFormatContext *oc, AVStream *st)
{
- AVCodec *codec;
AVCodecContext *c;
c = st->codec;
- /* find the video encoder */
- codec = avcodec_find_encoder(c->codec_id);
- if (!codec) {
- fprintf(stderr, "codec not found\n");
- exit(1);
- }
-
/* open the codec */
- if (avcodec_open(c, codec) < 0) {
+ if (avcodec_open2(c, NULL, NULL) < 0) {
fprintf(stderr, "could not open codec\n");
exit(1);
}
"The output format is automatically guessed according to the file extension.\n"
"Raw images can also be output by using '%%d' in the filename\n"
"\n", argv[0]);
- exit(1);
+ return 1;
}
filename = argv[1];
}
if (!fmt) {
fprintf(stderr, "Could not find suitable output format\n");
- exit(1);
+ return 1;
}
/* allocate the output media context */
oc = avformat_alloc_context();
if (!oc) {
fprintf(stderr, "Memory error\n");
- exit(1);
+ return 1;
}
oc->oformat = fmt;
snprintf(oc->filename, sizeof(oc->filename), "%s", filename);
audio_st = add_audio_stream(oc, fmt->audio_codec);
}
- /* set the output parameters (must be done even if no
- parameters). */
- if (av_set_parameters(oc, NULL) < 0) {
- fprintf(stderr, "Invalid output format parameters\n");
- exit(1);
- }
-
- dump_format(oc, 0, filename, 1);
+ av_dump_format(oc, 0, filename, 1);
/* now that all the parameters are set, we can open the audio and
video codecs and allocate the necessary encode buffers */
/* open the output file, if needed */
if (!(fmt->flags & AVFMT_NOFILE)) {
- if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0) {
+ if (avio_open(&oc->pb, filename, AVIO_FLAG_WRITE) < 0) {
fprintf(stderr, "Could not open '%s'\n", filename);
- exit(1);
+ return 1;
}
}
/* write the stream header, if any */
- av_write_header(oc);
+ avformat_write_header(oc, NULL);
for(;;) {
/* compute current audio and video time */
if (!(fmt->flags & AVFMT_NOFILE)) {
/* close the output file */
- url_fclose(oc->pb);
+ avio_close(oc->pb);
}
/* free the stream */
projects / ffmpeg / blobdiff