"I have two files off my Nokia (which I don't have anymore) and I have installed every codec I could find and a bunch of players and converters and none of them seem to let me play the files. The files have *.mp4 extension and header looks something like this:
ftypmp42 mp423gp4isom mdat
GSpot gives me this:
mp42: MP4 v2 [ISO 14496-14]
- 3gp4: 3GPP Media (.3GP) Release 4
- isom: MP4 Base Media v1 [IS0 14496-12:2003]"
Look for a good solution to play your MPEG4v2(Microsoft MPEG-4 version 2) encoded files on a MPEG-4/DivX/Xvid playback device? It is easy. Just follow the article here. It mainly shows you the easiest way to convert MP42 to another friendly video format such as MPEG-4, Xvid, DivX, etc for playing on a media device without quality loss via a powerful MP42 Video Converter – Foxreal Video Converter (for Mac).
The step-by-step guide:
Step 1: Run Foxreal Video Converter as the fast MP42 Converter on your computer, and then add your MP42 encoded video files into it. (Hint: You can choose MediaInfo o check if the files are encoded with MP42 codec ID.)
Step 2: Choose MPEG-4, XviD, DivX or other friendly video format as output format from "Format< Common Video". Just take MPEG-4 as an example here.
Step 3: Start MP42 to MPEG-4 MP4 conversion by clicking on "Convert" on the main interface of this powerful MP42 to MPEG4 Converter’s main interface.
After the above operations, you could get the output video files from its default folder. Thus you are able to play them on your media device.
That’s all! Hopefully the guide of playing MP42 encoded videos will do a great favor for you.