[FFmpeg-cvslog] avformat/movenc: Fix editlist with hybrid_fragmented

[Zhao Zhili]

ffmpeg | branch: master | Zhao Zhili <zhilizhao at tencent.com> | Fri Jun 13 01:32:31 2025 +0800| [920071355dd82a74ab9bfd879d42401702b83a5e] | committer: Zhao Zhili

avformat/movenc: Fix editlist with hybrid_fragmented

The segment_duration must not be set to zero when writing the moov
atom for the second time. This is related to edit lists in standard
MP4 files.

Reviewed-by: Martin Storsjö <martin at martin.st>
Signed-off-by: Zhao Zhili <zhilizhao at tencent.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=920071355dd82a74ab9bfd879d42401702b83a5e
---

 libavformat/movenc.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index cd5b45f6fe..a651d6d618 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -4036,8 +4036,13 @@ static int mov_write_edts_tag(AVIOContext *pb, MOVMuxContext *mov,
     /* For fragmented files, we don't know the full length yet. Setting
      * duration to 0 allows us to only specify the offset, including
      * the rest of the content (from all future fragments) without specifying
-     * an explicit duration. */
-    if (mov->flags & FF_MOV_FLAG_FRAGMENT)
+     * an explicit duration.
+     *
+     * For hybrid_fragmented during mov_write_trailer (mov->moov_written != 0),
+     * don't reset duration to zero.
+     */
+    if (mov->flags & FF_MOV_FLAG_FRAGMENT &&
+        !(mov->flags & FF_MOV_FLAG_HYBRID_FRAGMENTED && mov->moov_written))
         duration = 0;
 
     /* duration */