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movenc: check that fps for tmcd is within encodable range. 

The fps is stored as a 8 bit value thus 255 is the maximum encodable.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-01-17 18:52:35 +01:00
parent 9362f31b55
commit 55d66b2790
1 changed files with 5 additions and 0 deletions
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5
libavformat/movenc.c
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@ -1149,6 +1149,11 @@ static int mov_write_tmcd_tag(AVIOContext *pb, MOVTrack *track)
int frame_duration = av_rescale(track->timescale, track->enc->time_base.num, track->enc->time_base.den);
int nb_frames = 1.0/av_q2d(track->enc->time_base) + 0.5;
if (nb_frames > 255) {
av_log(NULL, AV_LOG_ERROR, "fps %d is too large\n", nb_frames);
return AVERROR(EINVAL);
}
avio_wb32(pb, 0); /* size */
ffio_wfourcc(pb, "tmcd"); /* Data format */
avio_wb32(pb, 0); /* Reserved */