[FFmpeg-devel] [PATCH] lavf/dashenc: Remove global_sidx from movenc params for live streaming.

Andrey Semashev andrey.semashev at gmail.com
Thu Nov 29 16:58:24 EET 2018

On 11/28/18 7:25 PM, Jeyapal, Karthick wrote:
> On 11/28/18 4:41 PM, Andrey Semashev wrote:
>> The global_sidx flag causes errors like the following in movenc when media
>> segment removal is enabled via windos_size or remove_at_exit:
>> Non-consecutive fragments, writing incorrect sidx
>> Unable to re-open  output file for the second pass (faststart)
> Removing global_sidx flag adds sidx atom to each moof fragment adding significant bitrate overhead.
> Instead I have submitted a patch to handle this case cleanly in movenc. http://ffmpeg.org/pipermail/ffmpeg-devel/2018-November/236873.html
> Please try the above patch and let me know if that will work for you.

Yes, that patch seems to fix the errors. Thanks.

On a slightly unrelated note, during testing, I've also seen different 
errors like these:

[AVFormatContext] Application provided duration: -1 / timestamp: 243456 
is out of range for mov/mp4 format
[AVFormatContext] pts has no value

These happen when media segments are rotated and file deletion is 
enabled. They don't seem to happen on every file rotation, though, and I 
can't find what could be causing them. These errors are present 
regardless of the global_sidx flag or your movenc patch. Do you have an 
idea what could be causing them?

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