[Mplayer-cvslog] CVS: main mencoder.c,1.95,1.96 cfg-mencoder.h,1.27,1.28

[Gabucino]

> Gabu will do better comparison (i hope) - he has big experience in such
> tests...
Ah :) I wouldn't dare to say that ;)
Spent this day testing divx4 vs mpeg4, and I couldn't come to a clear
conclusion (yet). However, this indecisiveness means that I can't
decide which one's quality is better. Some remarks :
 - uploaded some sample png's to http://mplayerhq.hu/~gabucino/test/mpeg4
   I'll refer to them below.
   I have very limited net, sorry :( /see next remark/
 - It seems to me that lavc mpeg4 encodes with too high bitrate in the
   beginning of the file (and can't set smaller), so can't test reliably (and
   upload) 3-5Mb samples. I'll try to workaround it later, somehow..
   (IMPORTANT: I usually test with ~700kbr, since that's the bitrate for
    1CD dvdrips, and musicvideo encodes)
 - OVERALL experience for 700kbr : libavcodec is sometimes worse, sometimes
   better quality than divx4 1pass ! Check with the following commands :
   Better :
	xv 01-lavc-02/*40.png 01-divx4-1pass-02/*40.png
	xv 01-lavc-02/*35.png 01-divx4-1pass-02/*35.png
   Worse :
	xv 01-lavc/*10.png 01-divx4-1pass/*10.png

 - I've seen a strange case where 2pass divx4 produced VERY blocky image,
   and both 1pass and mpeg4 beat it..
 - And one where 2pass divx4 produced a messy movie, like when calling mplayer
   with -forceidx and seeking. Ok this should be about libavcodec, but
   I thought I'd mention it anyways. Needs checking... <yawn>
 - I didn't use any other libavcodec options, just vbitrate - as I don't
   know them..
 - My opinions may change unexpectedly! ;)

I agree in what we already know: lavc mpeg4 beats divx4 by its speed/quality
value on high(er) bitrates. (mostly checked on lower bitrates, yet..)

I'll make some more tests tomorrow - I'm not sure about my current
opinion :))

-- 
Gabucino
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