Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > Video Encoding > MPEG-4 AVC / H.264

Reply
 
Thread Tools Search this Thread Display Modes
Old 11th February 2015, 16:00   #1  |  Link
Witzig
Registered User
 
Join Date: Jan 2014
Posts: 13
Quantizer matrices

I've experienced quantizer matrices to be very useful in some situations, though it seems like an underrated feature and so not many are to be found on the internet.

What quantizer matrices have you come across that might come in handy?
Witzig is offline   Reply With Quote
Old 11th February 2015, 18:43   #2  |  Link
mandarinka
Registered User
 
mandarinka's Avatar
 
Join Date: Jan 2007
Posts: 729
Check this thread: http://forum.doom9.org/showthread.php?t=124755

Not sure if they come in handy. I've tried Prestige once and while it looked like it could help a tiny bit at first, I think I ruled that out in later experimenting. With RDO and trellis going on in x264, these things have limited effect and question is if they don't actually hurt. Maybe try that CCE-HD matrix at the end of the thread, that might be interesting experiment.
mandarinka is offline   Reply With Quote
Old 12th February 2015, 01:00   #3  |  Link
Lyris
Registered User
 
Join Date: Sep 2007
Location: Europe
Posts: 602
I've never heard of anyone using custom quant matrices being able to explain why they're better, it's always struck me as a "scratch and sniff" situation with a heavy dose of confirmation bias.

That said, I did encode one movie where using the JVT matrix rather than x264's default reduced mosquito noise in one scene. It's not something I routinely adjust myself though.
Lyris is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 11:55.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.