swresample: document the need to configure the context using AVOptions

[ffmpeg] / ffmpeg.h

diff --git a/ffmpeg.h b/ffmpeg.h
index 30890a0ee85f9561c46273d20203ebde17d0deae..d124a2cf9b4233390d8c27c7b1b8aa45768be989 100644 (file)
--- a/ffmpeg.h
+++ b/ffmpeg.h
@@ -402,7 +402,8 @@ typedef struct OutputStream {
     double forced_keyframes_expr_const_values[FKF_NB];
 
     /* audio only */
-    int audio_channels_map[SWR_CH_MAX];  /* list of the channels id to pick from the source stream */
+#define FF_CH_MAX 32
+    int audio_channels_map[FF_CH_MAX];   /* list of the channels id to pick from the source stream */
     int audio_channels_mapped;           /* number of channels in audio_channels_map */
 
     char *logfile_prefix;
@@ -502,6 +503,7 @@ void show_usage(void);
 
 void opt_output_file(void *optctx, const char *filename);
 
+void remove_avoptions(AVDictionary **a, AVDictionary *b);
 void assert_avoptions(AVDictionary *m);
 
 int guess_input_channel_layout(InputStream *ist);