[FFmpeg-user] Strange problem with creating chapters

[Cecil Westerhof]

I am playing with ffmpeg again. I got a few questions, so I will be
posting them in the near future.

But I have one very strange problem that is kind of urgent.

I have a metafile to create chapters. It works OK except for the first
chapter.

My metafile starts with:
    ;FFMETADATA1
    title=Improvisations

    [CHAPTER]
    TIMEBASE=1/1
    START=105
    END=239
    title=Just a test case

When creating the file with the chapters I see:
    Input #1, ffmetadata, from 'evaluaties.txt':
      Metadata:
        title           : Improvisations
      Duration: 00:16:35.00, start: 0.000000, bitrate: 0 kb/s
        Chapter #1:0: start 105.000000, end 239.000000
                            ^^^^^^^^^^
        Metadata:
          title           : Just a test case
    .
    .
    .
    Output #0, mp4, to '09-ImprovisatiesMetHoofdstukken.mp4':
      Metadata:
        title           : Improvisations
        encoder         : Lavf58.45.100
        Chapter #0:0: start 105.000000, end 239.000000
                            ^^^^^^^^^^
        Metadata:
          title           : Just a test case

But with ffprobe I am seeing:
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '09-ImprovisatiesMetHoofdstukken.mp4':
      Metadata:
        major_brand     : isom
        minor_version   : 512
        compatible_brands: isomiso2avc1mp41
        title           : Improvisations
        encoder         : Lavf58.45.100
      Duration: 00:16:35.83, start: 0.000000, bitrate: 2434 kb/s
        Chapter #0:0: start 0.000000, end 240.000000
                            ^^^^^^^^
        Metadata:
          title           : Just a test case

What could be happening here?

I am using Debian 11 and ffmpeg version 4.3.2-0+deb11u2.

I could probably solve it with a dummy chapter of a second at the
beginning, but would prefer a better solution.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof