[FFmpeg-user] Need help resolving concat error

[Carl Eugen Hoyos]

Moritz Barsnick <barsnick <at> gmx.net> writes:

> But, as Cley pointed out, that file doesn't have a 
> proper extension or a proper header, so "-f concat" 
> should be added as an input option.

This is neither extension- nor header-related:
The concat demuxer has immanent security issues and 
is therefore never auto-detected, you have to 
force it with -f concat to use it.

Carl Eugen