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From: Niklas Haas <ffmpeg@haasn.xyz>
To: ffmpeg-devel@ffmpeg.org
Date: Mon, 17 Mar 2025 15:24:32 +0100
Message-ID: <20250317142432.403855-1-ffmpeg@haasn.xyz>
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Subject: [FFmpeg-devel] [PATCH] avfilter/vf_libplacebo: don't explode on
zero FPS information
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From: Niklas Haas <git@haasn.dev>
While technically not specifiad as valid by the AVFilterLink documentation,
it is currently possible to get an FPS of zero from various sources inside
libavfilter (notably vf_buffersrc).
Avoid a division by zero and resulting infinity when this happens.
---
libavfilter/vf_libplacebo.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavfilter/vf_libplacebo.c b/libavfilter/vf_libplacebo.c
index 0c245cda7f..86e1f43dea 100644
--- a/libavfilter/vf_libplacebo.c
+++ b/libavfilter/vf_libplacebo.c
@@ -1073,7 +1073,7 @@ static int libplacebo_activate(AVFilterContext *ctx)
in->qstatus = pl_queue_update(in->queue, &in->mix, pl_queue_params(
.pts = out_pts * av_q2d(outlink->time_base),
.radius = pl_frame_mix_radius(&s->opts->params),
- .vsync_duration = av_q2d(av_inv_q(l->frame_rate)),
+ .vsync_duration = l->frame_rate.num ? av_q2d(av_inv_q(l->frame_rate)) : 0,
));
switch (in->qstatus) {
--
2.48.1
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