PR #21243 opened by ngaullier
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21243
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21243.patch

Fixes #21076.


>From 3574eb5ee096d6f7a9aeca6e59e785550cfe0167 Mon Sep 17 00:00:00 2001
From: Nicolas Gaullier <[email protected]>
Date: Fri, 19 Dec 2025 18:10:26 +0100
Subject: [PATCH] avformat/mov: fix skip_samples when sample_rate and time_base
 do not match

Fixes #21076.
---
 libavformat/mov.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 009ddfec80..66d3c0d4a8 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -4756,7 +4756,8 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
 
         if (!multiple_edits && !mov->advanced_editlist &&
             st->codecpar->codec_id == AV_CODEC_ID_AAC && start_time > 0)
-            sc->start_pad = start_time;
+            sc->start_pad = av_rescale_q(start_time, st->time_base,
+                    (AVRational){1, st->codecpar->sample_rate});
     }
 
     /* only use old uncompressed audio chunk demuxing when stts specifies it */
-- 
2.49.1

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