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 ) ) )
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 ) ) )