diff --git a/libavformat/mov.c b/libavformat/mov.c
index b03d017881..c14e3c15e5 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1572,11 +1572,7 @@ static int mov_finalize_stsd_codec(MOVContext *c, AVIOContext *pb,
         }
         break;
     case AV_CODEC_ID_AC3:
-        st->need_parsing = AVSTREAM_PARSE_FULL;
-        break;
     case AV_CODEC_ID_MPEG1VIDEO:
-        st->need_parsing = AVSTREAM_PARSE_FULL;
-        break;
     case AV_CODEC_ID_VC1:
         st->need_parsing = AVSTREAM_PARSE_FULL;
         break;