The VideoLAN Forums

I have two DVDs which show different behaviour when I try to transcode them to mp4. One works fine, the other fails. I'm using the convert/save option on a Linux version of vlc. The one that fails will transcode OK to mpeg 2 (just changing the output file to X.mpg rather than X.mp4). Any idea why this might be?

The one that does not work has this error:
[0x8f2e8dc] main mux error: cannot add a new stream (unsupported while muxing to this format). You can try increasing sout-mux-caching value
[0x8dbb084] stream_out_transcode stream out error: cannot add this stream

Whatever codec you use is not supported by the container format.

It is the same codec in both cases. For one DVD it works, for the other it does not. Both DVD VOB files have identical "file" signatures.

Just to be clear, I used the standard built-in profile for MP4 in both cases.

Whatever codec you use is not supported by the container format.

I assume you are referring to the output codec in which case it is the same for both (H.264)