[MPlayer-dev-eng] [PATCH] MJPEG patch of APP0/COM skip

Shan sweber at slingshot.co.nz
Mon Jan 26 11:49:44 CET 2004


Hi John Witford on 01/26/2004 08:02:42 Zulu the following was relayed:

> Not all JPEG segments necessarily escape marker values.
> Therefore it is wrong to just ignore an unwanted marker
> and depend on a generic marker search to skip over the
> unwanted segment contents.

This brings up the issue that mplayer doesn't support MJPEG A (markers) 
or B (no markers) which both use key frames and inter frames for 
temporal compression.  Therefore calling the key frame only JPEG codec 
mplayer uses MJPEG is incorrect and misleading.  In quicktime it's more 
correctly called "Photo - JPEG" for mplayer just drop the "M" and call 
it JPEG!

Shan




More information about the MPlayer-dev-eng mailing list