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 > High Efficiency Video Coding (HEVC)

Reply
 
Thread Tools Search this Thread Display Modes
Old 17th November 2019, 13:13   #1  |  Link
Losko
Registered User
 
Join Date: Dec 2010
Posts: 12
Filtering newbie

Hi, I use to encode my movies using x265 for space saving and I've read sometimes pre-filtering may raise content compressibility, now I can play with avisynth but I'm a total newbie at filtering.
First of all:
  1. does more compressibility mean the same content may be encoded faster?
  2. does more compressibility mean the same content may be encoded in a smaller size?

And then:
  1. where will I find some readings for a beginner?
  2. any suggestion for not going through trial and error?

Thank you for any hints.
Losko is offline   Reply With Quote
Old 17th November 2019, 15:10   #2  |  Link
birdie
.
 
birdie's Avatar
 
Join Date: Dec 2006
Posts: 143
1. depends on the source and your filters but if the source becomes less noisy then encoding might be faster though I guess less than 10% faster
2. surely

1. First read about noise patterns, then you may try googling for appropriate filters
2. This really depends on your source which might be a lot different than what others have posted on the net, so trialing might be a necessity. To save time you could take one clip, and encode a short part of it using different filters/filters parameters/encoding settings. If you're content with the results, you can proceed to encode the entire clip.
birdie is offline   Reply With Quote
Old Yesterday, 12:37   #3  |  Link
Forteen88
Herr
 
Join Date: Apr 2009
Location: North Europe
Posts: 378
I recommend TemporalDegrain2 (in AvisynthPlus) for high-quality denoising.
I normally use,
TemporalDegrain2(grainLevel=false)
Quote:
grainLevel, if input noise level is relatively low set this to false. This setting must be left enabled if disabling it increases the output noise level while all other settings are at default.
Forteen88 is offline   Reply With Quote
Old Yesterday, 18:29   #4  |  Link
StainlessS
HeartlessS Usurer
 
StainlessS's Avatar
 
Join Date: Dec 2009
Location: Over the rainbow
Posts: 7,207
When encoding, noise looks like detail to encoder, and so it has to try hard to retain the false detail and so larger less compressable result.
Denoise, produces smaller, and less nasty results, some on-site prefer a little noise, I'm not too keen on noise at all.
I like McDegrainSharp() with default settings [in avisynth], although the sharpening will not produce quite as dramatic a reduction in size,
so can just use McDegrain if better compression required. Many prefer TemporalDegrain2, I'll have to try it one day.
Also Limiter() after any denoise will eliminate out of TV_Levels range color components with further reduction in size likely.
__________________
I sometimes post sober.
StainlessS@MediaFire ::: AND/OR ::: StainlessS@SendSpace

"Some infinities are bigger than other infinities", but how many of them are infinitely bigger ???
StainlessS is offline   Reply With Quote
Reply

Tags
encoding, filtering, h265

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 05:37.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.