diff options
| -rw-r--r-- | libavcodec/ituh263dec.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c index 4a8bbf7798..31951abd65 100644 --- a/libavcodec/ituh263dec.c +++ b/libavcodec/ituh263dec.c @@ -928,8 +928,9 @@ int ff_h263_decode_picture_header(MpegEncContext *s) } /* temporal reference */ i = get_bits(&s->gb, 8); /* picture timestamp */ - if( (s->picture_number&~0xFF)+i < s->picture_number) - i+= 256; + + i -= (i - (s->picture_number & 0xFF) + 128) & ~0xFF; + s->picture_number= (s->picture_number&~0xFF) + i; /* PTYPE starts here */ |