Ticket #2439: 2439-v4.patch

libs/libavcodec/mpegaudio_parser.c

@@ -74 +74 @@
 
     *sample_rate = s->sample_rate;
     avctx->channels = s->nb_channels;
+    avctx->avcodec_dual_language = (s->mode == MPA_DUAL) ? 1 : 0;
     avctx->bit_rate = s->bit_rate;
     avctx->sub_id = s->layer;
     return s->frame_size;