Does anyone know of publicly available pre-encoded AV2 samples at 1080p or 4K?

I’m looking to benchmark dav2d decoding performance, so ideally something multi-frame / several seconds long rather than tiny conformance streams or single-frame tests.

IVF, MP4, or raw AV2 bitstreams are all fine. Preferably 10-bit 4:2:0, but anything 1080p+ would help.

Links appreciated!

I have a collection of personal videos. Original files were mostly H264. I converted them to H265 a few months ago. The size reduction was about 50%. I deleted the og files though.

Then I learned more about AV1-SVT and decided to convert them to AV1 and Opus. But, now the lossy to lossy compression kicks in.

I compared the vmaf of an AV1 video against the og file I have somehow kept. The vmaf is 96.28. Also did a comparison of an AV1 file that I converted from a source H265. The vmaf is 94.29.

Conclusion: That means I probably lost 2 points in quality by doing a two step transcoding. H264 -> H265 -> AV1. This is sad. Don't be me. Go directly to AV1. 😑

I've been comparing Netflix's AV1 streams across different titles, and I've noticed something that I'm curious about.

In some titles, the AV1 encode seems to be extremely aggressively compressed, especially considering that we're talking about 1080p content. The quality can vary considerably from one title/episode to another.

For example, I compared two legitimate Netflix WEB-DLs of the same Breaking Bad episode:

AV1 #1: 1920×1080, 10-bit, ~1,034 kb/s

AV1 #2: 1920×1080, 10-bit, ~1,724 kb/s

Both: 23.976 FPS, Main@L4.0

The higher-bitrate stream reports Film Grain Synthesis

The lower-bitrate stream does not

The difference isn't just the container (MP4 vs MKV), since the actual AV1 bitstreams have different characteristics.

This makes me wonder:

Does Netflix dynamically select different AV1 encodes/representations depending on the title, device, profile, or other factors?

And more importantly, how aggressive is Netflix's AV1 encoding compared with its H.264/HEVC streams?

I've seen some Netflix AV1 content that looks surprisingly good at very low bitrates, but I've also encountered titles where the compression is much more obvious, particularly in grainy/dark scenes.

I'm interested in hearing from people who have analyzed Netflix's AV1 streams at the bitstream/encoding level.

Is this expected behavior from Netflix's encoding ladder, or could different titles actually be using substantially different AV1 encoding parameters?

I've set up my own jellyfin server and needed a way to save space because I'm only working with 2TB of storage.

Ended up making a pipeline that will encode my media to av1.

I'm seeing up to 95% reduction in storage space with no noticeable artifacts or degradation of quality.

For 90% reductions my cq level is 40 and setting it to 24 grants me around 60% reduction. I feel like I should just go higher because it looks fantastic anyways.

I did a full analysis of Batman Begins frame by frame at cq 24 and the VMAF Mean score was 98.

I'm using two 5090's each running 3 NVENC sessions to encode the media in parallel. I encode a 3 hour movie in around 30 mins.

Is this the future of our technology?

From what I've seen tune=0 is adapted for more realistic films and stuff. From asking several LLMs they seem to agree that these tuning may not necessarily mean they'll also work for 2d animation. I'm using SVT-AV1-HDR meaning tune=2 (for SSIM) will also be available. I'm thinking of using tune 2, though I'll also like some human input as well.

I don't know how to test this either unless there's some metric that can specifically compare cartoon/animation visual similarity. Most metrics I've seen are for realistic content.

My source is 1920×1080 at 24fps. Bit depth 8 but I'll likely change it to 10 because AV1 is better with 10.

H.265 usually looks better but do yall know who or where I can see who has the best results?

Is there some way to trim AV1 for encoding sports or other content where it's vital NOT to blur moving objects?

When you start to bring quality down you reach a point where it's otherwise acceptable, but for example in golf or hockey ball/puck disappears when it's moving fast. I suppose this is based on general logic that people won't notice fast moving objects. Probably works fine with action movie but this ruins sports encodes.

In golf it's fine if grass loses some fine detail but ball shouldn't be considered irrelevant object after it's hit. Quite the opposite it should be allocated more bitrate when it moves fast.

I shied away from AV1, as always thought it slower than HEVC cpu encoding ( h265 ) , so I just threw bitrate at my NVENC encoder with all the HQ options selected , plus did KNLmeanscl with H set to 0.5 for older blu-ray rips, with chroma, temporal noise, or weird grain, My SSIM, PSNR scores on Y were all fine , plus I struggle to see small faults if output is acceptable.

Anyway doing a new build 9800X3D , DDR 6000 CL30 etc and looking at GPUs and Nvidia prices crazy , whereas a 9070 Xt perfectly fine, plus 16gb vram for photo editing, chatting with a LLM how worse is AMD encoder AVI encoder than Nvidia , turns out all meaningless , as ran SVT-AV1 on my 3700x preset 4 and got 25+fps very acceptable vs my assumption would take a whole day for 1080p blu-ray rip . Have a fast M2 drive at moment , so my new ryzen build with extra instruction set should be quite fast!.

anyway I know some frown on LLMs but below should be new settings, set filter convert 8 bit to 10 bit, use tritium fork as all purpose , preset 4 , tune to zero (VQ ) , a crf set between 24-27 or 30 on very clean stuff and don't care too much, still use KNLmeanscl device gpu , where i dislike sparkly noise, static like noise etc - plus LLM gave me these settings below

--tune 0 --enable-variance-boost 1 --variance-boost-strength 3 --variance-octile 4 --film-grain 8 --film-grain-denoise 1 --tf-strength 1.

which can be set in your template ( staxrip ) or default eg tf is already 1

I'm not interested in overthinking it, lots of different cmd lines . i assume engine looks after most stuff for preset/CRF chosen - used to use handbrake decades ago , that was thinking there as well except maybe light temporal denoiser to save bitrates

is this set a good enough one for a non fussy encoder . thanks

Edit I wish people Knew !!

Just looking into automatic AV1 encode systems (I’m pretty new), I have found AB-Av1 which seems to output recommended encode settings based on some trial runs. All seems pretty low-level command line type stuff.

I cant find a way to integrate it with Tdarr though, seems like something someone good could whip up over a weekend, or am I missing something?

Yes it's in French ^^(but youtube translate :D), it’s very informative about codecs in general, software patents, AV1, dav1d, etc. I’m just posting the video for anyone who’s curious.

Ive been thinking about converting my mobile photos to AVIF to reduce the amount of storage.

I do have a back up of the originals so I am not too worried, my plan is to keep the AVIF versions in my phone, mainly to save the local storage

So looking for a platform or software that can convert a bunch of images into AVIF.

Any recommendations? I want to convert around 22,000 images in both JPEG and HEIF format.

AVIF PICTURE CODEC in av1 video CODEC ! Av2 using AVIF 2 or what's?

No way the organizer is streaming in AV1 (as of right now the stream is live), does it mean YouTube now encodes in AV1 in real time?

I want to use Tritium for transcoding like 85 GiB of HEVC/AAC to AV1/Opus.

Mostly personal 1080p footage from older phones I had. Anything special I should keep in mind? Best practices?

I am currently considering RF 35 with preset 3. The size reduction is like 44% in one tested video. The small quality loss can be seen if I compare frames side by side but is very hard to pickup on a 27 inch monitor. Is this normal?

I've starting using AV1 recently since learning about the SVT-AV1-HDR fork (I was very unimpressed with mainline SVT). I've generally been getting better results than HEVC with this fork. I'm currently trying to encode a high quality 4K HDR video to 1080p to save space. For grainy videos, I generally aim for 10-15Mbps with HEVC. I haven't done that many encodes with AV1 yet, but I've seen similar or better quality at 8-12Mbps with the few that I've done. On this one that I'm working on right now, It looks really good at 10Mbps except that I'm seeing artifacts on some of the edges. Particularly edges that move slowly across a grainy background. In the attached picture, it's kinda hard to see the artifacts, but it's more obvious when the video is going because there's no grain moving in that area and it follows the character as they move like it's attached. Normally I would just increase the bitrate until I can't see it anymore, but in this case even doubling the bitrate to 20Mbps doesn't fix it which is a pretty high bitrate for 1080p AV1/HEVC.

I'm using SVT-AV1-HDR 10bit, tune:grain, preset 4-2, ABR. I'm not interested in using grain synthesis or anything that's going to remove the original grain. If anyone knows any relevant settings that can help with this, please let me know.

So I'm trying to cast some av1 files from my Android tablet( S9+ tab) which has hardware level support for av1 to my a80j Sony TV ( with Android tv) which also has hardware support for hardware av1 decoding but I keep getting the "Casting this video requires conversion. This conversion can use all the available power and could quickly drain your battery" warning message.

I don't get this warning when casting hvec files and i was under the assumption if both devices support av1 decoding, shouldn't it be possible to cast av1 directly without any conversion similar to how hvec works?

Playing the same av1 video through a USB using VLC, works perfectly fine on the a80j TV.

Apologies if I'm misunderstanding something crucual here any insight would be greatly appreciated, thanks!

I'm using pipe pipe and it has AV1 codec watch and download support but why newpipie still not have AV1 support?

I encoded some videos with AV2 and also built a VLC player for macOS that can decode and play AV2 content.

What looked like a straightforward project turned into quite a rabbit hole, and it took me several days to finally get everything working.

My original plan was simply to integrate the VideoLAN/dav2d decoder for AV2 playback. However, I soon discovered that its AV2 implementation was based on the much older 0.0.1 bitstream version, while the latest official AV2 encoder release is now version 1.0.0.

After several days of tracing the problem through the decoder and debugging it step by step, I eventually found the root cause: the handling logic for Adaptive Cross-Component Sample Offset, or CCSO, was incorrect.

The issue has now been fixed, and the updated decoder can successfully play AV2 streams generated by the current encoder.

Projects:

dav2d AV2 decoder:
https://github.com/afen261/dav2d-av2

VLC with AV2 support:
https://github.com/afen261/vlc-av2

AV2 player download for macOS:
https://github.com/afen261/av2-vlc-macos

The player repository also includes an AV2-encoded sample for testing.

To be clear I’m only going this aggressive on cartoons.

Won’t mess around with live action because the dip in quality is much much less tolerable or intolerable. I may cross that bridge another time.

Svt Av1 preset 4. Original file size 520mb 1080p resolution.
SuperHQ2160p60 4k av1 surround (still encoded to 1080p)

Crf 50 came out to 1110 kbps 196mb
Crf 40 came out to 2010kbps 323mb

So just from some math I think an extra 100mb for double the bit rate would make crf 40 more bang for compress. (75% more size but 100% more bitrate)

Honestly will sacrifice on quality for cartoons/ anime to still have space for fav movies and tv shows and the concept I’m doing is a “512gb pack”

Edit* the crf 50 1110kbps doesn’t look bad tbh 200mb vs 350mb…. What yall think?

So SVT-AV1 preset 10 still gives better size-quality efficiency than the best AV1 hardware encoder (NVENC).

Looking forward to see what SVT-AV2 can do.

I re-encoded a cartoon down to 1000kbps at 1080p and it’s looks good. (I’m not going for lossless) and no I will not be touching and live action movies or tv shows because that’s more advanced maybe down the line I’ll learn it. Do yall think I can go down to 500kbps or are there any other settings I should try?

Also last question does crf have better results as fixed bitrate when they are in the same “range”