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avformat/swfenc: Check frama rate before writing it

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Fixes assertion failure with ffserver

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-12-17 01:23:43 +01:00
parent 25f6ccccd6
commit 6ea7dd25c7
1 changed files with 4 additions and 0 deletions
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4
libavformat/swfenc.c
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@ -256,6 +256,10 @@ static int swf_write_header(AVFormatContext *s)
(will be patched if not streamed) */
put_swf_rect(pb, 0, width * 20, 0, height * 20);
if ((rate * 256LL) / rate_base >= (1<<16)) {
av_log(s, AV_LOG_ERROR, "Invalid (too large) frame rate %d/%d\n", rate, rate_base);
return AVERROR(EINVAL);
}
avio_wl16(pb, (rate * 256) / rate_base); /* frame rate */
swf->duration_pos = avio_tell(pb);
avio_wl16(pb, (uint16_t)(DUMMY_DURATION * (int64_t)rate / rate_base)); /* frame count */