On Tue, 2011-09-06 at 19:52 -0400, Paul Taggart wrote:
> It has been a long time since March (I just joined this group today)
> but the cause of your problem is due to an upgrade in ffmpeg. The
> current versions of ffmpeg have two ac3 codecs (ac3 & ac3_fixed).
> Cinelerra uses the ac3 codec without defining a sample format. The ac3
> codec only supports floating-point samples while your audio samples
> are most likely 16bit fixed point. The following patch should fix this
> problem:
>
Let's try again and see if the formatting works better.
diff -ur cinelerra-cv_orig/cinelerra/fileac3.C
cinelerra-cv_fixed/cinelerra/fileac3.C
--- cinelerra-cv_orig/cinelerra/fileac3.C 2011-09-06 12:00:27.000000000
-0400
+++ cinelerra-cv_fixed/cinelerra/fileac3.C 2011-09-05 15:10:15.000000000
-0400
@@ -86,7 +86,8 @@
{
avcodec_init();
avcodec_register_all();
- codec = avcodec_find_encoder(CODEC_ID_AC3);
+// codec = avcodec_find_encoder(CODEC_ID_AC3);
+ codec = avcodec_find_encoder_by_name( "ac3_fixed" );
if(!codec)
{
eprintf("codec not found.\n");
@@ -96,9 +97,14 @@
codec_context->bit_rate = asset->ac3_bitrate * 1000;
codec_context->sample_rate = asset->sample_rate;
codec_context->channels = asset->channels;
+ codec_context->sample_fmt = AV_SAMPLE_FMT_S16;
+ if(asset->channels = 6)
+ codec_context->channel_layout = AV_CH_LAYOUT_5POINT1;
+//printf("FileAC3::open_file 1 Rate=%d Sample=%d Channels=%d Codec=0x%x
\n", codec_context->bit_rate, codec_context->sample_rate, codec_c
ontext->channels, codec);
if(avcodec_open(codec_context, codec))
{
eprintf("failed to open codec.\n");
+//printf("FileAC3::open_file 2 failed to open codec.\n");
return 1;
}
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