diff options
| -rw-r--r-- | libavformat/m4vdec.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/libavformat/m4vdec.c b/libavformat/m4vdec.c index 4a0af3c037..9d69dcc042 100644 --- a/libavformat/m4vdec.c +++ b/libavformat/m4vdec.c @@ -33,16 +33,18 @@ static int mpeg4video_probe(AVProbeData *probe_packet) for (i = 0; i < probe_packet->buf_size; i++) { temp_buffer = (temp_buffer << 8) + probe_packet->buf[i]; - if ((temp_buffer & 0xffffff00) != 0x100) + if (temp_buffer & 0xfffffe00) + continue; + if (temp_buffer < 2) continue; if (temp_buffer == VOP_START_CODE) VOP++; else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++; - else if (temp_buffer < 0x120) + else if (temp_buffer >= 0x100 && temp_buffer < 0x120) VO++; - else if (temp_buffer < 0x130) + else if (temp_buffer >= 0x120 && temp_buffer < 0x130) VOL++; else if (!(0x1AF < temp_buffer && temp_buffer < 0x1B7) && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) |