[XviD-devel] XviD options nearly all documented in mencoder... need you help!

[Guillaume POIRIER]

Hi,
Le mar 07/09/2004 à 00:01, Edouard Gomez a écrit :
> Ok so here is the par option description:
[..]
Ok, I documented them, and the description looks a lot like what you
wrote. It should get into the cvs by tomorrow.

> You should insist about the fact what users usually know, is
> the DAR not the PAR. It's quite disturbing to set a PAR to
> pal43, and don't get a display ratio of 4:3 because the
> f(DAR)=PAR relation depends also on the sampled image width
> and height. Hope you get the idea, better using, autoaspect or
> aspect for joe user, it's something he's more used to.

Yes, I insisted on that too.


> If my module updates go into the CVS, you can also add that if
> an extended PAR is specified and matches a standard one, then
> the standard will be used for the bitstream syntax, even if
> the extended one is still valid syntax.
No problem. Could you maybe post on this list or send a private email to
me when it get committed?

Anyway, big thanks for your explanations.

Apart from that I'm still testing the new front-end.
I mencoded ;-) "21 grams", which pictures are fairly noisy on some
scenes, and it is shot with a "camera on the shoulder" so the camera is
pretty much moving all the time, and GMC was probably a bit win here
(didn't test with or without, just bvop_hq)


without bvop_hq:
Video stream: 1487,243 kbit/s  (185905 bps)  size: 1332027218 bytes 
7165,080 secs  179130 frames
The value 99.99dB is a special value and represents the upper range
limit
xvid:     Min PSNR y : 34,06 dB, u : 42,46 dB, v : 44,47 dB, in frame
112543
xvid: Average PSNR y : 40,76 dB, u : 48,13 dB, v : 48,75 dB, for 179125
frames
xvid:     Max PSNR y : 99,99 dB, u : 65,35 dB, v : 65,35 dB, in frame 0

with bvop_hq:
Video stream: 1487,194 kbit/s  (185899 bps)  size: 1331982600 bytes 
7165,080 secs  179130 frames
The value 99.99dB is a special value and represents the upper range
limit
xvid:     Min PSNR y : 33,84 dB, u : 44,37 dB, v : 46,44 dB, in frame
145386
xvid: Average PSNR y : 40,86 dB, u : 48,12 dB, v : 48,73 dB, for 179125
frames
xvid:     Max PSNR y : 99,99 dB, u : 65,35 dB, v : 65,35 dB, in frame 0


Just like last time, bvop_hq improves PSNR and slightly reduces the size
of the movie.
With my very own eyes, I'd say that the "bvop_hq" option seems to
produce smoother pictures, I like its pictures better.


If you'd like more tests, you're sure welcome to ask.

oh... and did you fix the "duplicate frame" problem?

Regards,
Guillaume
La science n'a pas de patrie. -+- Louis Pasteur -+-