[SOLVED] Extracting Chapters From mp4

[RandolfS]

I'm using Yamb 2.1.0.0 Beta 2 to extract the video and audio from mp4 files, but it doesn't appear to have a feature to extract the chapters. I've searched around for an alternative to Yamb that has this feature but I can't find anything.

Is there a program that can extract chapters from mp4 files?

Thanks for any suggestions you can offer.

[ozok]

Well, you can use mp4box which is used by Yamb. I don't remember the exact commands but you can extract chapters and write that information to a text file.

[RandolfS]

I tried that, but I couldn't work out how to extract the chapters. If I use the command

mp4box.exe [filename.mp4] -info

It only lists two tracks (the video and the audio) so I'm not sure how to extract the chapters.

I could extract the video and audio to .h264 and .ac3 files with:

mp4box.exe [filename.mp4] -raw 1
mp4box.exe [filename.mp4] -raw 2

Unsure what to do from there I tried assuming that the chapters were track 3, but the following don't work:

mp4box.exe [filename.mp4] -raw 3
mp4box.exe [filename.mp4] -ttxt 3

It just says, "Cannot find track ID 3".

The only information in the documentation about chapters is the -chap switch, but that's for adding chapters to an mp4 file.

Maybe I'm doing it wrong, but I don't think mp4box supports chapter extraction.

[ozok]

I've just a looked at TX264 source to see how I did it and it is:

mp4box.exe "FilePath" -dump-chap

AFAIK it only writes to console, so you may want to extract it to a text file adding ">chapters.txt" to the commands above.

[RandolfS]

I've just a looked at TX264 source to see how I did it and it is:

mp4box.exe "FilePath" -dump-chap

AFAIK it only writes to console, so you may want to extract it to a text file adding ">chapters.txt" to the commands above.

That worked. Thanks a lot for the help

[ozok]

No problem. You may want to edit topic's title to show its solved.