Need a Quant Matrix

[X-Rayden]

I've test some quant matrix but i'm not satisfied!

i need the best quality, whatsoever, the filesize is no problem, the biterate.... the machine to play the movie can do 18 Mo/sec of biterate...

our search for a codec as found XviD, the best, but, we need an little extra quality.

we have 2 machines to play 2 simultanous movie, the same movie, to do a 3D houseShow. our resolution is 720 x 486 in 16:9 (squeezed pixels) project in a 14 foot large screen... we just dont want anybody to see a mpeg 4 glitsh of 3 foot large... :)

any matrix you know who can help?

also, anybody have a logo? an xvid logo, animated or not, cute enough to be present in the show, because we want to advertize the use of XviD :) thanks!

[iago]

Hi. You might wanna try a high bitrate matrix such as Andreas78er. See Nic's post in this thread: http://forum.doom9.org/showthread.php?threadid=54999&highlight=andreas78er

Btw, use xvid.dll to decode, not libavcodec if you use that matrix.

And, if file size is not an issue for you, -not to mention that :)- you should go for quant 2, chroma motion, qpel, vhq, deactivating b-frames, and if still not satisfied may even try some extra sharpening and/or use blockbuster in order to increase the detail level (hence the bitrate) even more and prevent dct blocks from occuring.

regards,
iago

[Nibor]

As a logo you could take the picture from the xvid.org (http://www.xvid.org) homepage, IMO it's cute enough :p
On Nic's Page (http://nic.dnsalias.com/) there's another logo (don't remember if it was the same) but ATM it seems to be broken!?

[sh0dan]

You might run into CPU limitations, when using advanced features like QPel.

I'm currently showing a stereo rendered 3D movie on a 4x2m large screen using two projectors hooked up to a dualhead graphics card. I'm playing a 1536x384 XviD using ffdshow, and when adding noise to the video I get about 60% CPU utilization on an Athlon XP 2600+ (Barton).

My main concern is of course a fluid playback, so I use 0) quant 2. 1) MPEG matrix, 2) VHQ 0 (as size is of no concern, but limiting CPU usage is) 3) Chroma ME (doesn't hurt) 4) Keyframe every 3 (!!!) frames 6) No bframes, gmc, qpel, lumi masking.

I tend to get framesize around 100-500k on average. With a 25fps movie this is a max of 12.5MB/sec (megabyte per sec), which is a lot - even when we have a WD ATA100 drive.

You might want to try some of the more agressive matrices, but beware of framesizes - so you do not kill the decoder or the HD.