join raw video files

[exekutive]

I'm trying to join together four Y4M files.

I tried using both of the ffmpeg methods on this page:
http://trac.ffmpeg.org/wiki/Concatenate

Both times, I get this error:

[yuv4mpegpipe @ 0x7fce28809400] ERROR: Codec not supported.
Could not write header for output file #0 (incorrect codec parameters ?): Invalid data found when processing input

How can I join them using my Mac please? Thanks in advance.

[exekutive]

Using "cat" to crudely join the files doesn't work either. Only the first clip plays.

[exekutive]

I figured it out:

- First I converted all the files to raw YUV
- then I did a crude concatenation ('cat')
- then I ffmpeg converted the ouput yuv file back to y4m

[LigH.de]

A full command line example of your first try would have been useful. I guess explicitly stating formats (yuv4mpegpipe) may have helped. But the position of parameters is important.

PS: Tested and failed as well, so far...

Solution: omit the "-c copy"; concatenating raw formats does not need codec actions to be specified, they are not supported for such formats.

ffmpeg -f concat -i list.txt -f yuv4mpegpipe out.y4m

Thanks to JEEB on IRC

[exekutive]

Thanks. I'll try that next time.