[FFmpeg-devel] [PATCH] DCA - setup correct channel value when downmixing is required

[FB2000]

Without this, trying to convert 5.1 DTS sample to 2 channels Wave with
command

ffmpeg -i sample.dts -ac 2 out.wav

always failed with error "Resampling with input channels greater than 2
unsupported", because avctx->channels still equals to 6.



Index: dca.c
===================================================================
--- dca.c       (revision 24472)
+++ dca.c       (working copy)
@@ -1371,6 +1371,7 @@
         if (avctx->request_channels == 2 && s->prim_channels > 2) {
             channels = 2;
             s->output = DCA_STEREO;
+            avctx->channels = 2;
             avctx->channel_layout = CH_LAYOUT_STEREO;
         }
     } else {