[FFmpeg-user] Concat input protocol: more files, more missing streams

[littlebat]

On Sat, 14 Sep 2013 18:13:14 +0200
Thierry Lelégard <thierry.lelegard at free.fr> wrote:

> Hello,
> 
> After all, the problem seems the size of the input, not the usage of
> the concat: protocol. I just tried to merge the 5 VOB files into one
> big .mpg file. And the result is the same: only 5 input streams are
> detected, all subtitle streams are missing.
> 
> See test below:
> 
> $ ffmpeg -probesize 10M -i VIDEO_TS.mpeg -codec:v copy -codec:a copy
> -t 10 -y out.mpg ffmpeg version N-56060-gbcd1c20 Copyright (c)

Your command line seems don't consider subtitle streams copy. Read
wiki:
https://ffmpeg.org/trac/ffmpeg/wiki/How%20to%20concatenate%20%28join%2C%20merge%29%20media%20files

An untested idea:
replace "-codec:v copy -codec:a copy" with "-c copy" in your all
commands.