Whats everyones thoughts on AV1 codec ?

ive recently had a couple of AV1 Source files and handbrake wouldn't recognise them the runtime was zero had to run them through Avidemux but recently is a option to encode it

i get handful of complaints for using HEVC because of they have not got codecs in players trying to use so i would imagine AV1 would be worse considering its new

google says its better than HEVC with small sizes

ive not tried it myself sticking with AVC or HEVC for now..

It may or may not be better, but no one really cares.

The "standard" people use is HEVC (normally x265), so I'll be sticking with that.

Its a bit like Betamax v VHS - BM was considered better, but everyone used VHS as the "standard", so it didnt matter.

ive not really looked into it ye im sticking with HEVC i still sometimes use AVC it depends how it looks when i do sample testing

only seen Zero0 and couple other using it

I tried AV1 using the NVIDIA encoder using the same low bitrate as an NVENC H265 clip and the AV1 clip turned out really blocky, As i`m on PC i dont have an issue playing files and prefer any thing that will save me hard drive space ( even tho i have plenty of terrabytes). I dont think Handbrake or NVIDA is quite there yet in terms of ultra low bitrates, tho over time will improve. Those with technical knowledge and are able to navigate the complicated UI of Staxrip may have better results. Ive seen a few AV1 1gigabyte size in 1080p 1hr30 movies on this site, they arent exactly super high quality but still... making alot of progress, so will be curious to look out for future releases.

Last edited by realityshow on 2024-03-26 09:49:09

Originally posted by Saturn5

It may or may not be better, but no one really cares.

The "standard" people use is HEVC (normally x265), so I'll be sticking with that.

Its a bit like Betamax v VHS - BM was considered better, but everyone used VHS as the "standard", so it didnt matter.

Can't stand HEVC x265 with it's grainy as fooook look (mascarading as definition)...slow ass re-encoding when using HEVC files also...i can only imagine the outcome when using AV1 to ultra compress a file

I teach my encoder to use what it needs to give me beautification, regardless of size/bitrate/compression

It's a bit like LazerDisc v Betamax/VHS....Betamax sucked a plum big time, VHS got worse the more you played it...but at least ya movie looked magic with LazerDisc

I like the AV1 codec because it out-paces HEVC at higher resolutions and the quality:compression is amazing. But I've held back because my Intel NUC is getting long in the tooth just won't put out on 4K files. The Kodi I'm running doesn't support it either (Kodi DOES support AV1 since v20). But no point updating libreelec when I know the i5 processor in the NUC won't handle the big jobs. When I get around to getting my next media unit (Pi5--much cheaper and so punchy now) I'll definitely be getting into AV1. I've just been too lazy to pull the trigger.

Edit: I know I'm not an uploader, just a lowly user. But I do encode from source material when I can find it. Just thought I could contribute--hope that's OK.

Last edited by zuluDROOG on 2024-04-11 14:23:28

I really like av1

For resolutions 720p/1080p it's nice, for 4k is awesome pretty good savings on space.

The big problem is the stress on CPU's both to encode as decode.

Right now when I'm on handbrake I always use "fast decode" to help CPU decoding in old smartphones/notebooks/TV's, I usually lost 1-2 vmaf but I think it's worth.

I believe that it's better than h265 at the same bitrate, better psnr, ssim and vmaf.

Last edited by saakshipandit2 on 2024-05-07 20:04:53

### Saving Space with Video Encoding: A Simple Comparison

I recently re-encoded a large movie file "Kung.Fu.Panda.4.2024.UHD.BluRay.2160p.TrueHD.Atmos.7.1.DV.HEVC.REMUX-FraMeSToR"(with ab-av1) to see how much space I could save while keeping the video quality almost the same. Here's what I found:

Original File

- Size: 43GB

Re-encoding Results

4K (2160p) Resolution:

x264:

 - Size: 5.09GB (12% of original)

 - Time: 3 hours

 - Quality: VMAF 98.11 crf 20 preset slow

x265:

 - Size: 2.55GB (6% of original)

 - Time: 7 hours

 - Quality: VMAF 98.22 crf 21 preset slow

AV1:

 - Size: 1.62GB (4% of original)

 - Time: 9 hours

 - Quality: VMAF 98.45 crf 25 preset 4

Full HD (1080p) Resolution:

x264:

 - Size: 1.90GB (4% of original)

 - Time: 49 minutes

 - Quality: VMAF 96.11 crf 19 preset slow

x265:

 - Size: 1.20GB (3% of original)

 - Time: 2 hours

 - Quality: VMAF 96.19 crf 20 preset slow

AV1:

 - Size: 812.90MB (2% of original)

 - Time: 4 hours

 - Quality: VMAF 96.26 crf 25 preset 4

Key Takeaways

x264: Fastest to encode but larger file sizes.

x265: Good balance between time and size.

AV1: Smallest file sizes but longest to encode.

By using AV1, I achieved the smallest file sizes while maintaining high video quality, though it took the most time to encode. This comparison helps in choosing the right codec depending on your priority: speed, quality, or space-saving.

Last edited by Rosy2955 on 2024-07-12 12:14:29

I have quite a few different downloads of the movie 'No Country For Old Men' in storage, i have just downloaded an AV1 version to try out and that will be my first look at an AV1 properly, at a quick glance it looks good .

I have no interest in encoding and uploading as i know that's out of my league tbh, which is why i have a lot of time for the uploaders who do what they do for us.

No Country For Old Men is only available in 1080p and 720p as far as i know, i have 2 AI Upscaled to 2160p copies (one is a higher frame rate), a 1080p remux, hybrid open matte 1080p (full screen) version, so a few to compare with the AV1 and i will have a look at the weekend

Cheers Pete

awesome movie, waiting for your opinion on the av1 file

I don't know if these upscale versions are worth it, maybe I also give it a try.

Originally posted by Rosy2955

awesome movie, waiting for your opinion on the av1 file

I don't know if these upscale versions are worth it, maybe I also give it a try.

The one i have that is 60 fps and upscaled looks incredible to be honest, i think whoever tries the AI route needs the patient of a Saint to get the settings correct, it is in my user picks if you want to have a look for yourself Rosy.

I think if there is fast action in the video they use a slightly different method to get it right, i have a Saving Private Ryan that was from a 2160p remux source and that has been enhanced and the frame rate quickened, it looks incredible as well

Hello everyone,

I'd love to gather your feedback on this comparative table. It showcases various encoding profiles for 2160p resolution videos, including both x265 and AV1 codecs, with details on Constant Rate Factor (CRF), Video Multimethod Assessment Fusion (VMAF) scores for quality prediction, predicted file sizes, and bitrates.



I'm particularly interested in your insights on:

-Which encoding profiles stand out to you in terms of quality and efficiency?

-Any experiences with these codecs and settings?

-Suggestions for improving encoding quality or reducing file sizes?

Looking forward to hearing your thoughts and learning from your experiences! Your feedback will be greatly appreciated.

Last edited by Rosy2955 on 2024-07-18 13:51:21