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-rw-r--r--libavformat/mov.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/libavformat/mov.c b/libavformat/mov.c
index dd44bab15d..e196365231 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1033,8 +1033,10 @@ static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
st->codec->block_align = sc->bytes_per_frame;
break;
case CODEC_ID_ALAC:
- if (st->codec->extradata_size == 36)
+ if (st->codec->extradata_size == 36) {
st->codec->frame_size = AV_RB32((st->codec->extradata+12));
+ st->codec->channels = AV_RB8 (st->codec->extradata+21);
+ }
break;
default:
break;