Concatenation of mp4 files from Lumix GH4

[johnlink]

Is there a way to use ffmpegX to concatenate several mp4 files from a Lumix GH4 camera?

[smrpix]

Are these spanned clips? There are better ways (and an explanation):

http://www.dpreview.com/forums/thread/3693275?page=2

[johnlink]

The clips were recorded with the MP4 option rather than the AVCHD option, so the better way you suggest is not possible in this case.

If only I had told the videographer to select the AVCHD option!

[Case]

MP4Box -force-cat -cat file1.mp4 -cat file2.mp4 [...] ouput.mp4

Note: -force-cat may prevent some non-obvious errors, but is not supported in v0.4.0 bundled with ffmpegX (inside the application package). A newer version 0.4.6 does support this command. Latest version 0.5.1 can be retrieved from the application package of GPAC tools (Osmo4).

[johnlink]

MP4Box -force-cat -cat file1.mp4 -cat file2.mp4 [...] ouput.mp4

Note: -force-cat may prevent some non-obvious errors, but is not supported in v0.4.0 bundled with ffmpegX (inside the application package). A newer version 0.4.6 does support this command. Latest version 0.5.1 can be retrieved from the application package of GPAC tools (Osmo4).

I presume the MP4Box command is to be executed from Terminal. Is there any way to do the concatenation from the ffmpegX interface?

[Case]

I presume the MP4Box command is to be executed from Terminal.

Correct.

Is there any way to do the concatenation from the ffmpegX interface?

Unfortunately not. The Join tool in ffmpegX supports m1v, m2v, mpg, and avi, but not mp4.