FFmpeg: How do I split a 100GB MP4 file into several 1GB files?

[zopiro]

Is it possible to use ffmpeg to split a big video file into several smaller files? I know it can be done by duration, using -f segment and -segment_size %s where %s is the duration. But can it be done by size?

If not, is there any other open source or freeware program for Windows that can easily split a 100GB file into several 1GB files?

[hech54]

Do you want these piece playable?
If not:
WinZip, 7Zip ?

[Baldrick]

MyMp4Boxgui (mp4box frontend) can split by size. Under the Split tab.

[zopiro]

Do you want these piece playable?
If not:
WinZip, 7Zip ?

Yes, I need them playable.

[theewizard]

100gb = 100 1gb files
That's a lot more than several

I think it would make a lot more sense to split into 10 * 10gb
Or something similar
But hey..what ever

[VirtualDoobMon]

/edit - sorry -endpos isn't the way to go. I swear i used that with a version of ffmpeg and it surprisingly worked.

[pandy]

You must cut at GOP boundaries - assumption is that file use closed GOP structure - if not then problem is even more complicated (open GOP will require to analyze DTS/PTS and all splitting must be GOP/DTS/PTS wise).
I assume you need (ffmpeg) with two (at least) passes - first pass to analyze structure and export this to some log file (ffprobe), then you need to parse this logfile to create script for second ffmpeg pass - ffmpeg overall may be not a most optimal tool - perhaps specialized code can be more optimal.

[Baldrick]

Did you try mp4box? Or the gui???

[zopiro]

Did you try mp4box? Or the gui???

Sorry, somehow I missed your reply. I'll give it a try, thanks.

[johns0]

Mkvmerge can split it if you don't mind mkv video files.