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avfilter/f_reverse: Apply PTS compensation only when pts is available

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Fixes: out of array access
Fixes: tickets/10753/poc16ffmpeg

Regression since: 45dc668aea0edac34969b5a1ff76cf9ad3a09be1
Found-by: Zeng Yunxiang
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2023-12-23 18:04:32 +01:00
parent 50f0f8c53c
commit 61e73851a3
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GPG Key ID: B18E8928B3948D64
1 changed files with 2 additions and 1 deletions
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3
libavfilter/f_reverse.c
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@ -266,7 +266,8 @@ static int areverse_request_frame(AVFilterLink *outlink)
AVFrame *out = s->frames[s->nb_frames - 1]; AVFrame *out = s->frames[s->nb_frames - 1];
out->duration = s->duration[s->flush_idx]; out->duration = s->duration[s->flush_idx];
out->pts = s->pts[s->flush_idx++] - s->nb_samples; out->pts = s->pts[s->flush_idx++] - s->nb_samples;
s->nb_samples += s->pts[s->flush_idx] - s->pts[s->flush_idx - 1] - out->nb_samples; if (s->nb_frames > 1)
s->nb_samples += s->pts[s->flush_idx] - s->pts[s->flush_idx - 1] - out->nb_samples;
if (av_sample_fmt_is_planar(out->format)) if (av_sample_fmt_is_planar(out->format))
reverse_samples_planar(out); reverse_samples_planar(out);