[FFmpeg-devel] [PATCH] avfilter/vf_libplacebo: don't explode on zero FPS information

[Niklas Haas]

From: Niklas Haas <git at 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