[mythtv] [PATCH] Add new MPEG4 encoding options

Edward Wildgoose Edward.Wildgoose at FRMHedge.com
Tue Apr 1 11:12:53 EST 2003

> Here is a patch to include the 'VHQ' and '4MV' encoding options for MPEG4
> encoding.  Nothe that these take a LOT of cpu processing, and on my
> 1.6GHz machine, I can only record at 560x416 with these options enabled
> (and that is about 85% usage) as opposed to without them 640x480 uses
> only 60%.  The video quality is substatially better though (560x416 with
> these options looks significantly better than 640x480 without them in my
> opinion).  You can enable VHQ without 4MV, but it is not recommended to
> enable 4MV without VHQ (see this page for more info on different options
> http://rguyom.ath.cx/)

On my machine applying this patch causes some lipsync issues due to slight sound delay.  It could just be because the machine is on the limit (dual 1Ghz Pentium 3) and I haven't tried enabling the options in myth to deal with this

Actually at first I thought it could simply have been something to do with the extra processing required, however, thinking about it, I reckon the sound was behind the video, not vice versa as you might expect..

I will assume that it is specific to my machine unless someone else has seen this as well?

More information about the mythtv-dev mailing list