[FFmpeg-user] FFMPEG - Concatenate 2 MP4 Files, one has video and audio and the other has only audio

[Carl Eugen Hoyos]

Avinash Jairam <avinashjairam <at> gmail.com> writes:

> I am trying to [concat] 2 mp4 files using FFMPEG. One of these 
> files has both video and audio (track1.mp4), while the other 
> one has only audio 

This is not supported, see 
https://ffmpeg.org/ffmpeg-formats.html#concat-1

What would you have expected as output?

Carl Eugen