Warning from ffmpeg

[scribblemaniac]

I am getting the following warning from ffmpeg when doing a merge job:

Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly

Sounds ominous :P

I tried a few different things to solve this, but none of them worked.

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[morevnaproject]

Something to do with this - http://trac.ffmpeg.org/ticket/5189#comment:1

Or, somehow, we need to set "setpts=PTS-STARTPTS" for every input file: http://superuser.com/a/892161

The setpts filter is used because the concat filter documentation states: For this filter to work correctly, all segments must start at timestamp 0.

http://ffmpeg.org/ffmpeg-filters.html#concat

Maybe we should rewrite our code to use concat filter instead of concat demuxer. In this case, we have to read .txt file and dynamically generate ffmpeg commandline. But this can produce VERY long commandline for files with many parts. And we can exceed the length of commandline. :-/

[morevnaproject]

Ah, I see now! According to this, seems we need to specify duration for every file - https://www.ffmpeg.org/ffmpeg-formats.html#Examples

[scribblemaniac]

You seem to be on the right track, however I just tried adding a duration and rendering manually, and it still seems to be throwing that warning. Perhaps you will have better luck ^_^