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 21st November 2021, 11:41   #1  |  Link
Yog_Sothoth
Registered User
 
Join Date: Dec 2019
Posts: 36
x265 (HEVC) basic encoder settings?

Hello. It's all too complicated for me. Could you just tell me what the basiс settings for encoding are?

For example:
Profile.
Level.
Preset.
Scaling mode (for downscaling).
Any other options I need to change aside from bitrate, resolution, rate control mode? As I understand, 2-pass encoding is better, but people still use constant quality one, why?
__________________
System: i5 3570k; 8 Gb ddr3; SW: Windows 10 x64, latest updates; k-lite codec pack mega, latest updates; Monitor: HP x2301, Receiver: YAMAHA RX-V371
Yog_Sothoth is offline   Reply With Quote
Old 21st November 2021, 12:26   #2  |  Link
Atak_Snajpera
RipBot264 author
 
Atak_Snajpera's Avatar
 
Join Date: May 2006
Location: Poland
Posts: 7,806
Because nobody aims for CD/dvd anymore. 2-pass is a waste of time and space
Atak_Snajpera is offline   Reply With Quote
Old 21st November 2021, 19:59   #3  |  Link
RanmaCanada
Registered User
 
Join Date: May 2009
Posts: 328
Just pick a CRF and a speed, and you're good to go. The baseline of the speed profiles does a "good" job of getting you decent quality without massive tweaking. Slow or lower is better.
RanmaCanada is offline   Reply With Quote
Old 22nd November 2021, 11:18   #4  |  Link
Yog_Sothoth
Registered User
 
Join Date: Dec 2019
Posts: 36
Quote:
Originally Posted by RanmaCanada View Post
Just pick a CRF and a speed, and you're good to go. The baseline of the speed profiles does a "good" job of getting you decent quality without massive tweaking. Slow or lower is better.
For which bitrates hevc performs better compared to avc? I've tested them on 6 Mb/s and I think they are pretty similar, but avc is slightly better (if you zoom in and take a closer look). Is that correct, I thought it shouldn't be the case? I've also tried higher and lower bitrates and at all them, they perform pretty similar, but at around 3 Mb - hevc certainly wins, and at 12 Mb - avc slightly wins. So, where is that threshold between bitrates for hevc and bitrates for avc?
__________________
System: i5 3570k; 8 Gb ddr3; SW: Windows 10 x64, latest updates; k-lite codec pack mega, latest updates; Monitor: HP x2301, Receiver: YAMAHA RX-V371
Yog_Sothoth is offline   Reply With Quote
Old 23rd November 2021, 02:42   #5  |  Link
RanmaCanada
Registered User
 
Join Date: May 2009
Posts: 328
Quote:
Originally Posted by Yog_Sothoth View Post
For which bitrates hevc performs better compared to avc? I've tested them on 6 Mb/s and I think they are pretty similar, but avc is slightly better (if you zoom in and take a closer look). Is that correct, I thought it shouldn't be the case? I've also tried higher and lower bitrates and at all them, they perform pretty similar, but at around 3 Mb - hevc certainly wins, and at 12 Mb - avc slightly wins. So, where is that threshold between bitrates for hevc and bitrates for avc?
It all depends on the source material. But if my answer is not good enough, I am sure one of the more knowledgeable users will chime in.
RanmaCanada is offline   Reply With Quote
Old 23rd November 2021, 03:55   #6  |  Link
videoh
Useful n00b
 
Join Date: Jul 2014
Posts: 1,667
Quote:
Originally Posted by RanmaCanada View Post
I am sure one of the more knowledgeable users will chime in.
You seem pretty knowledgeable to me. Believe.

@all

Happy Thanksgiving!
videoh is offline   Reply With Quote
Old 29th November 2021, 21:19   #7  |  Link
benwaggoner
Moderator
 
Join Date: Jan 2006
Location: Portland, OR
Posts: 4,750
Quote:
Originally Posted by Yog_Sothoth View Post
For which bitrates hevc performs better compared to avc? I've tested them on 6 Mb/s and I think they are pretty similar, but avc is slightly better (if you zoom in and take a closer look). Is that correct, I thought it shouldn't be the case? I've also tried higher and lower bitrates and at all them, they perform pretty similar, but at around 3 Mb - hevc certainly wins, and at 12 Mb - avc slightly wins. So, where is that threshold between bitrates for hevc and bitrates for avc?
HEVC generally takes around 50-70% the bitrate to hit the same quality as H.264 at the same presets (so x265 slower than x264). High enough and bitrate and quality will converge. Best comparisons are with H.264 at the lowest bitrate that achieves a subjective quality target.

Comparing with 2-pass VBR is better than just CRF, as CRF values aren't equivalent across codecs or content types.
__________________
Ben Waggoner
Principal Video Specialist, Amazon Prime Video

My Compression Book
benwaggoner is offline   Reply With Quote
Reply

Tags
encoding, hevc, settings, x265

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 20:35.


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