Error: bad track: 'mp4v'

[edent]

I'm trying to fix a broken 3GP file. I have a couple of working files from the same camera. When I run untrunc I get this error.

Info: version '' using ffmpeg '4.1.3-0ubuntu1'
Info: reading /data/working.3GP
Info: parsing healthy moov atom ... 

Info: unknown track 'mp4v' found -> fallback to dynamic stats
Error: bad track: 'mp4v'

Any idea what I can do to fix it?

[anthwlock]

See this function? One needs to implement it.
If you get it to work, please make a PR.
I can only help you if you give me the pair of files (working+broken)!

Edit:
It looks like some effort was alredy done for this: Hacklin/untrunc@cb2d05d.
Does it work?

[anthwlock]

@edent
I added said function, however it will (currently) only work when building against ffmpeg 3.3.
If interested, read here why.

Hope it works now!