Doom9's Forum - View Single Post - New Custom Quantization Matrices - EQM AVC Series. Last update: EQM AVC-HR 2005-08-01

trbarry · 2nd August 2005, 01:35

Hi Sharktooth -

When I wanted consistantly high quality and didn't care greatly about a precise bit rate I would often use 1-pass Xvid with a constant quant of 2, but with 2 b-frames, at q=3. Varyingly this would also be with one of your custom matrices. Other options to taste but mostly using more CPU to get better compression efficiency in a single pass. I tend to store things on external USB drives so a precise size is not that important. While I dislike wasting space it's often not worth another pass just to hit a arbitrary size target if quality demands more anyway.

Can you off hand recommend any sort of fairly high bit rate X264 equivalent set of fixed quant options?

Sorry if this has been covered before but I've been away for awhile and a search didn't turn up anything with these priorities. I don't yet have much feel for what I can get out of X264 (or Nero?) with fixed quants but you seem to work with these things a bit.

- Tom

PS - These are mostly HD caps, at 720p or 544p though I don't know if it matters here.

2nd August 2005, 01:35	#4 \| Link
trbarry Registered User Join Date: Oct 2001 Location: Gainesville FL USA Posts: 2,092	Hi Sharktooth - When I wanted consistantly high quality and didn't care greatly about a precise bit rate I would often use 1-pass Xvid with a constant quant of 2, but with 2 b-frames, at q=3. Varyingly this would also be with one of your custom matrices. Other options to taste but mostly using more CPU to get better compression efficiency in a single pass. I tend to store things on external USB drives so a precise size is not that important. While I dislike wasting space it's often not worth another pass just to hit a arbitrary size target if quality demands more anyway. Can you off hand recommend any sort of fairly high bit rate X264 equivalent set of fixed quant options? Sorry if this has been covered before but I've been away for awhile and a search didn't turn up anything with these priorities. I don't yet have much feel for what I can get out of X264 (or Nero?) with fixed quants but you seem to work with these things a bit. - Tom PS - These are mostly HD caps, at 720p or 544p though I don't know if it matters here. __________________ My video filters (still) at www.trbarry.com. Last edited by trbarry; 2nd August 2005 at 01:38.