From e2b20632b8c71a4e174511f8ff6e8342e0c63bd3 Mon Sep 17 00:00:00 2001
From: James Almer <jamrial@gmail.com>
Date: Mon, 30 Dec 2024 00:25:41 -0300
Subject: [PATCH] avfilter/buffersrc: check for valid sample rate

A sample rate <= 0 is invalid.

Fixes an assert in ffmpeg_enc.c that assumed a valid sample rate would be set.
Fixes ticket #11385.

Signed-off-by: James Almer <jamrial@gmail.com>
(cherry picked from commit 1446e37d3d032e1452844778b3e6ba2c20f0c322)
---
 libavfilter/buffersrc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavfilter/buffersrc.c b/libavfilter/buffersrc.c
index fbbf9b75e8..0c5736be7d 100644
--- a/libavfilter/buffersrc.c
+++ b/libavfilter/buffersrc.c
@@ -402,6 +402,11 @@ FF_ENABLE_DEPRECATION_WARNINGS
         av_channel_layout_describe(&s->ch_layout, buf, sizeof(buf));
     }
 
+    if (s->sample_rate <= 0) {
+        av_log(ctx, AV_LOG_ERROR, "Sample rate not set\n");
+        return AVERROR(EINVAL);
+    }
+
     if (!s->time_base.num)
         s->time_base = (AVRational){1, s->sample_rate};