[MPlayer-users] Re: 1080i to 1080p mpeg2 or x264?

[Tony Houghton]

In <Pine.A41.4.64.0602281628340.182028 at dante72.u.washington.edu>, Loren Merritt wrote:

> On Tue, 28 Feb 2006, Steven Adeff wrote:
> >
> >oops I mean to go to mpeg4, mpeg4 takes 5x the time to encode over
> >mpeg2 from my tests but only nets about 20% file size savings.
> 
> Are you sure?
> In a quick test with no mpeg4-specific options, I got mpeg4 vs mpeg2 is 
> 18% slower and 16% lower bitrate per psnr.
> mbd=2:trell:vmax_b_frames=1:subcmp=2:last_pred=2:vcodec=(mpeg4|mpeg2video)
> Of course you can make it really slow if you turn on everything, so 
> just don't do that.

And you can probably get much better file savings without degrading
subjective quality noticeably by specifying a lower bitrate.

-- 
TH * http://www.realh.co.uk