[MEncoder-users] new doom9 codec comparission (submission)

Matthias Wieser mwieser at gmx.de
Sat Dec 17 12:47:27 CET 2005

Am Freitag, 16. Dezember 2005 22:27 schrieb Rich Felker:

> How far in the past? These issues weren't known until September 2005.
> BTW here are screenshots of XVID decoded with both XVID IDCT and
> ffmpeg's default mpeg4 idct:
> XviD: http://img39.imageshack.us/img39/3341/154xvid6xt.png
> libavcodec: http://img39.imageshack.us/img39/4590/154avcodec2da.png
> XviD: http://img39.imageshack.us/img39/6135/283xvid3tg.png
> libavcodec: http://img39.imageshack.us/img39/573/283avcodec5xl.png
> As you can see, the ones decoded with the 'wrong' idct look bad in the
> same way (or at least a very similar way) that lavc mpeg4 looked bad
> in the doom9 tests!

"And just in case, I still gave ffdshow a go in the lobby shootout and 
found that while decoders do tend to decode a bit differently, it has no 
effect on how you rate codecs in relation to each other." 

> > > But the last straw is that I actually tried ffdshow. I watched the
> > > lobby shootout again, XviD and lavc only. Now that makes two
> > > scenarios where XviD would have a so called disadvantage, yet
> > > despite that it still looks better
> I thought you said that you weren't able to get proper screenshots
> using ffdshow...?

"The main reason I did chose the ateme decoder is that it supports frame 
accurate seeking, so I can tell my player to jump to frame X, and it will 
jump there."

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