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movenc: take packet dts shifting into mention in check_pkt

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This FFmpeg-specific "fuzzer fix" was never perfect, but now it
stopped encoding of actual content with a big enough DTS shift.
This returns the function to its original state of results
before negative CTS offsets were added.

I remember dealing with this function before, but somehow had
forgotten about it during VDD. The test cases not tripping this
over also didn't help.
This commit is contained in:
Jan Ekström 2017-09-30 01:04:00 +03:00 committed by Clément Bœsch
parent 8be3fc88d3
commit ffc58b2ce2
1 changed files with 6 additions and 0 deletions
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6
libavformat/movenc.c
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@ -4989,6 +4989,12 @@ static int check_pkt(AVFormatContext *s, AVPacket *pkt)
} else
ref = pkt->dts; // Skip tests for the first packet
if (trk->dts_shift != AV_NOPTS_VALUE) {
/* With negative CTS offsets we have set an offset to the DTS,
* reverse this for the check. */
ref -= trk->dts_shift;
}
duration = pkt->dts - ref;
if (pkt->dts < ref || duration >= INT_MAX) {
av_log(s, AV_LOG_ERROR, "Application provided duration: %"PRId64" / timestamp: %"PRId64" is out of range for mov/mp4 format\n",