On Fri, 13 Jun 2025, Zhao Zhili wrote:
From: Zhao Zhili <zhiliz...@tencent.com>
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.
---
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 */
--
2.46.0
LGTM, this sounds reasonable to me.
// Martin
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