[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 merge 2 mp4 files using FFMPEG

Do you want to "merge" or to "concatenate" two mp4 files?
The concat demuxer can only be used for concatenation, 
merging is done with something like:
$ ffmpeg -i file1 -i file2 -map 0 -map 1 ...

Carl Eugen