[FFmpeg-user] Concatenate mp4/h264 files, some without sound track

[Laurent Polèse]

Hello

I know this is covered in faq, but it didn't work for me.
I use ffmpeg version 0.10.9
I have 3 mp4 files to concatenate, ideally with no re-encoding.
But the trick is that first and last file has no sound track.

I tried the "mmcat" tool from burek, but I have sound issue.
I tried to add first sound to the files with no sound track, it didn't help.
I tried the concat filter, the MP4Box tool but I always have problems : the
sound disappears, loose sync, image freezes, etc.

Does anyone have in main a simple solution to just concatenate 3
mp4/h264/AAC files, some of them without sound tracks ?

Thanks a lot ;)