Arch Linux

zoqaeski

Member

From: /earth/australia/.

Registered: 2009-09-30

Posts: 133

Convert/split video into multiple chapters/files

Hello everyone

I recently acquired a seven-hour long documentary of sorts, and the 22 GB file seems to be a little too big for my computer to comfortably play, not to mention 7 hours being just a little bit too long for me to watch in one sitting. I was wondering if anyone knew of a program that would allow me to split this video into chapters, preferably as individual files, and do some other basic editing (reducing the frame rate to 25 fps, and maybe cutting some scenes). I've had a look around at Handbrake, but as far as I can tell, it doesn't allow me to split files, and if mencoder can do it (which I don't doubt, given its reputation as a Swiss army knife of video encoding), where on Earth would I start? Normally the command-line doesn't bother me, but mencoder is particularly esoteric. I'd rather not mess up my original file (it took a week to download and ate up half the month's quota), and I don't want to spend a couple of days waiting for my computer to split the file only to find out that something went horribly wrong.

Can anyone help me out?

useradded

Member

From: Edinburgh, UK

Registered: 2010-05-15

Posts: 77

Re: Convert/split video into multiple chapters/files

How about this?

http://fixounet.free.fr/avidemux/

karol

Archivist

Registered: 2009-05-06

Posts: 25,440

Re: Convert/split video into multiple chapters/files

You can ask for help http://www.doom9.org/ too.

ronnylov

Member

Registered: 2010-12-21

Posts: 65

Re: Convert/split video into multiple chapters/files

You can try MP4Box which is part of the package gpac in the Community repo.
http://gpac.wp.institut-telecom.fr/mp4b … mentation/

-splitx StartTime:EndTime : extracts a subfile from the input file. StartTime and EndTime are specified in seconds. Depending on random access distribution in the file (sync samples), the startTime will be adjusted to the previous random access time in the file.

So this utility can be used to split the original mp4 file into smaller parts. Another option if you want chapters is to remux it into matroska using mkvmerge which is part of the package mkvtoolnix (in Extra). Mkvmerge can also be used to split files.

If you want to convert to 25 fps then you need to reencode the video. You can use x264 encoder with the option --vf select_every:2,0 to remove every other frame and reduce framerate from 50 fps to 25 fps.
See this thread: https://bbs.archlinux.org/viewtopic.php?id=110231