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This post is roughly 15 years old; originally published on April 23, 2009! The information presented here may be out of date and inaccurate.
Please read this page but do keep its age in mind.
Some of my mobile phones have been able to record video clips in MPEG-4 format. Sadly some of these clips don’t play on the PlayStation 3 and those that do stutter terribly. I use iplayer-dl to download content from BBC iPlayer. Sadly the files are in a Quicktime container and are not playable on the PlayStation 3.
In order to address both these issues I created a script which extracts the audio and video from an existing MPEG-4 or ISO Media Apple QuickTime container and repacks them in a new MPEG-4 container with optional splitting of the resulting MPEG-4 to maintain FAT32 compatibility. The new MPEG-4 files play just fine on my PlayStation 3. This script works on Ubuntu, should work on any other Linux/Unix flavour and possibly Mac OS X providing you have the required tools installed.