[FFmpeg-user] Concatenating 2 or more MP4 videos containing multiple audio streams

[Sylvain Tremblay]

Hi

 

I'm struggling to find the correct command parameters to concatenate 2 MP4
videos containing multiple audio streams (different languages or codecs). 

 

I have 2 video files, a.mp4 and b.mp4 and each have the same 3 languages /
audio tracks in them.  I was able to get 1 audio track only so far.

 

I tried :

ffmpeg -i CLEO_D1-4.mp4 -i CLEO_D2.mp4 -c copy Cleopatra.mp4

 

and this one with f.txt containing the 2 file names

ffmpeg -f concat -i f.txt -c copy Cleopatra.mp4

 

and also different variations of -map which only returned errors such as
"Could not find tag for codec bin_data in stream #4, codec not currently
supported in container"

 

I searched Google for a couple of hours but could not find the correct
syntax for this task.

 

I do not need to convert any of the streams as I want the output to be
identical as the source files (same codecs)

 

Thanks ahead for your suggestions !

 

~ST