[FFmpeg-devel] [PATCH] avformat/movenc: editlist doesn't work with hybrid_fragmented

[Zhao Zhili]

> On Jun 13, 2025, at 00:03, Martin Storsjö <martin at martin.st> wrote:
> 
> On Thu, 12 Jun 2025, Zhao Zhili wrote:
> 
>> From: Zhao Zhili <zhilizhao at tencent.com>
>> 
>> ---
>> libavformat/movenc.c | 5 +++++
>> 1 file changed, 5 insertions(+)
>> 
>> diff --git a/libavformat/movenc.c b/libavformat/movenc.c
>> index cd5b45f6fe..93af0723db 100644
>> --- a/libavformat/movenc.c
>> +++ b/libavformat/movenc.c
>> @@ -7781,6 +7781,11 @@ static int mov_init(AVFormatContext *s)
>>        !(mov->flags & FF_MOV_FLAG_NEGATIVE_CTS_OFFSETS))
>>        s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_ZERO;
>> 
>> +    if (mov->use_editlist && mov->flags & FF_MOV_FLAG_HYBRID_FRAGMENTED) {
>> +        av_log(s, AV_LOG_ERROR, "Setting both hybrid_fragmented and use_editlist is not supported.\n");
>> +        return AVERROR(EINVAL);
>> +    }
>> +
> 
> This is probably ok, but we recently added a similar case for another incompatible option (faststart?), it'd be nice to place the cases close together.
> 
> Can you describe why it doesn't work together? Offhand I don't see why it wouldn't work though.

The bug is related to segment_duration in editlist. It’s set to zero for fmp4, that doesn’t work for standard mp4.
I have figured out a patch, but editlist is too complex than I can handle. Please help review.

https://ffmpeg.org/pipermail/ffmpeg-devel/2025-June/345057.html

> 
> // Martin
> 
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