[MPlayer-dev-eng] proposed new codecs.conf [Re: new video codec selection code]

[D Richard Felker III]

On Mon, Mar 18, 2002 at 07:44:30PM +0100, Daniel Egger wrote:
> Am Mon, 2002-03-18 um 18.07 schrieb D Richard Felker III:
> 
> > libmpeg2 is a TON faster for mpeg1 and 2.
> 
> Not for me. I optimised the shit out of ffmpeg on PowerPCs with AltiVec
> so finally the ac3 decoder is the hugest cpu consumer when watching CDs.
> Theoretically the builtin Rage Mobility chip could do iDCT in hardware
> but I never managed to get that running.
> 
> > Also, ffmpeg seems to have
> > problems continuing after dropped frames with mpeg1/2 (the video just
> > freezes until the next keyframe when i use -framedrop), whereas
> > libmpeg2 seems to do fine with a few dropped frames. This seems odd to
> > me since -framedrop is only supposed to skip vo, not decoding
> > (right?), but that's what seems to happen...
> 
> I'm seeing this problem with both codecs. For example when viewing DVDs
> and the drive just decided to spin down there's a vast jump in time
> but I expect that to be a buffering problem not one of the codec. I can
> well imagine that libmpeg2s read strategy prevents that.

That is definitely not the issue at hand on my end. I ensure that the
drive does not spin down, and use mplayer's cache, so this has nothing
to do with reading. Rather it's an issue with decoding, and lack of
performance for decoding.

Rich