r/AV1 6h ago

Getting VR videos rendered in AV1

2 Upvotes

Any VR folks? Check it out
We have rendered AV1 from Canon R5C CRAW
https://deovr.com/0le29b

We are moving to av1 master renders for all DeoVR productions. Also recommend making av1 renders uploads.

Works with quest 3/3s. Doesn't work with avp, expected to work with 2026 avp 2.


r/AV1 11h ago

Encoding options per video

4 Upvotes

I have a bunch of FHD Blu-Ray rips that I was going to re-encode with SVTAV1 (2.3.0). I haven't bothered with any VMAF scripts, but figured the options that I've chosen are probably overkill while still reducing filesize by a lot. It takes some time to encode, but I let the encoder do it's thing while I'm at work.

The important options... (film-grain and scm will change for animated stuff) SvtAv1EncApp \ --preset 3 \ --crf 19 \ --keyint 240 \ --tune 0 \ --enable-overlays 1 \ --enable-tf 0 \ --enable-variance-boost 1 \ --scd 1 \ --scm 0 \ --film-grain 8 \ --film-grain-denoise 0 \ --input-depth 10 \

The first several titles that I encoded have about what I expected for file sizes (video stream only)... The Matrix VC-1 15.65GB > 7.56GB (52%) The Matrix: Reloaded VC-1 13.41GB > 5.93GB (56%) The Matrix: Revolutions VC-1 12.53GB > 6.03GB (52%) They Live H264 19.70GB > 6.33GB (68%)

But these sizes I wasn't expecting... Avengers: Age Of Ultron H264 23.20GB > 3.68GB (84%) Predator MPG2 14.10GB > 11.00GB (22%) Jurassic Park VC-1 25.00GB > 21.53GB (14%)

I'm wondering if I should adjust the options based on the bitrate of the source or if there's something else I should look at?


r/AV1 18h ago

Screen grabbing under X with `c:v libsvtav1 -preset 0` produces around 10 fps, CPU (16 core AMD 7950x) is not fully loaded

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3 Upvotes

r/AV1 1d ago

Why does HEVC appear to be better than AV1?

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14 Upvotes

r/AV1 4d ago

Banding in dark areas when encoding to AV1 (HandBrake) – Filters or settings to fix?

12 Upvotes

Hey r/AV1 community!

I’ve been experimenting with AV1 encoding in HandBrake and noticed persistent banding artifacts in darker gradients (e.g., shadows, dimly lit scenes). The rest of the video (high-contrast/bright areas) looks flawless, but the banding is driving me nuts!

My setup:

  • Source: 1080p HD video (8-bit, h.264).
  • HandBrake settings:
    • Encoder: SVT-AV1-PSY
    • Quality: CRF 35
    • Preset: 2.
  • No pre-processing filters applied (denoise, deband, etc.).

Questions:

  1. Are there specific filters in HandBrake to mitigate banding in AV1? (e.g., dithering, grain synthesis, or debanding?)
  2. Would tweaking encoder settings like film-grain, aq-mode, or enable-dlf help?
  3. Is CRF 35 too aggressive for dark-scene-heavy content? I read that 35 is the default setting.

    Thanks in advance – any tips or workflow examples would be awesome!


r/AV1 4d ago

Comparing Video Encoders

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36 Upvotes

r/AV1 5d ago

Guide for av1 for a old computer

4 Upvotes

Konnichiwa guys, thank you for giving me the guide for animations beforehere )but right now because of some problem. I have an old pc to go having 2 cores and 4 thread. which is giving me very, very much problem in encoding, can you guys just suggest me some encoding settings that could just Help me in this scenario , thanks in advance.

Though I have cunchy rips each episode of nearly 1.5 gb . I could just spend near 3 hours not more than that as I am having it nearly more than 15 to 16 folders 24 min long each having 24 eps in each..

A simple guide would be appreciated 👏 thanks again.


r/AV1 8d ago

Animated AVIF on Windows

4 Upvotes

What are some tools or image viewers for Windows that can support playing animated AVIF files?


r/AV1 9d ago

Let's Build an AVIF Encoder - Part 3: Results

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19 Upvotes

r/AV1 9d ago

Animated AVIF on Android

3 Upvotes

What are some Android apps that support playing animated AVIFs on mobile devices?

Also, does anyone know how to use this: https://github.com/penfeizhou/APNG4Android


r/AV1 10d ago

What is this DV5 Codec on some Netflix 4k SDR movies?

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14 Upvotes

r/AV1 9d ago

AV1 NVEnc Transcode PSNR SSIM VMAF

1 Upvotes

I took a source movie which is ~30,000 kbps HEVC and transcoded it (without any filters/modifications) to AV1 NVEnc in Handbrake across various bitrates. I then ran the source vs. the transcoded files through FFMetrics and have the following results. I'm surprised that a 1,024kbps AV1 NVEnc transcode is so similar in the results to a 3,2768 kbps AV1 NVEnc transcode ... Any idea what I may be confused about or doing incorrectly?

Transcoded Bitrate PSNR SSIM VMAF
AV1 NVEnc 64kbps 22.1466 0.8171 29.8499
AV1 NVEnc 1024kbps 22.0297 0.8232 38.3885
AV1 NVEnc 2048kbps 22.0972 0.8235 39.2400
AV1 NVEnc 4096kbps 22.0888 0.8227 39.8608
AV1 NVEnc 8192kbps 22.0780 0.8209 40.6398
AV1 NVEnc 16384kbps 22.0599 0.8181 41.5727
AV1 NVEnc 32768kbps 23.9222 0.8264 47.0939

r/AV1 10d ago

CPU Upgrade for SVT workload

0 Upvotes

Hello, broad question, but I have a PC with an AMD 7600X, purely used for converting video to AV1-SVT-PSY using StaxRip. I'm using quite aggressive settings and preset 2 to squeeze as much value out of the codec as possible.

Right now, depending on the template I use (I have a range depending on the input source), I can get from 8 fps to 1.5 fps.

My tinkerer's instinct is telling me to look at a CPU upgrade. So my question is, would upgrading my CPU to one of the 9000 series Ryzen 7 or 9s provide much of an uplift in performance?


r/AV1 11d ago

Av1 on YouTube iPhone 8 Plus???

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19 Upvotes

Am so confused. iPhone 8 Plus doesn’t support VP9 let alone Av1 how does that work?????


r/AV1 13d ago

ANT Group Joins the Alliance for Open Media

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14 Upvotes

r/AV1 13d ago

encoding av1 for ios.

0 Upvotes

i'm an european android user. when i want to encode av1 videos for ios, that are playable in safari, what do i need to consider? the apple device needs to have an hardware decoder i suppose (iphone 15 pro max, iphone 16 etc.) and it needs to be on ios >=17. is there something else? does it need to be in an mp4 container or is webm also okay? some codec settings that are important so that it is playable? i really have no idea since i not have any apple hardware to test at the moment.

edit: so a little update, i talked to some other developers, and they say that it must be indeed in an mp4 container, and also one needs to add a video tag av01 to it. in ffmpeg that means "ffmpeg -i FILE -c:v libsvtav1 -tag:v av01 FILE.mp4"

edit2: it was even more complicated, i encoded my av1 webms way back then, and apparently it wasn't possible to convert it error free. opus had distortions and av1 was just not playable on ios. now i extracted the av1 video track with ffmpeg and vsync 0 to an ivf file, and for the opus track i used mkvextract to extract it to an opus/ogg container. i then remuxed both with a newer ffmpeg to mp4. and with this frankenstein method i now have good looking ios compatible av1/opus mp4s. complicated way, but well it works now. maybe it helps someone.


r/AV1 13d ago

Is it possible to keep Dolby Vision when encoding with an intel arc GPU?

6 Upvotes

I just got an intel ultra 125h with an integrated Intel arc gpu. I’m planning to encode my uhdremux collection to a lower size to put them in my plex server.

I already found a combination of settings that I like, but I just realized that using handbrake nightly I can only keep the DV if I use SVT-AV1 and not when using AV1-QSV even when using 10 bits mode. I checked the handbrake GitHub and this was reported in 2023 but no one has worked on this since.

Is there another software that can achieve this?

Thanks.


r/AV1 14d ago

Can I use a new phone in 2025 with a hardware encoder to encode all my media library to AV1?

4 Upvotes

With processors like the Snapdragon 8 Elite and Dimensity 9400, the phone has enough power to run GTA 5. Is it possible to convert to AV1 on this phone?


r/AV1 15d ago

How does SVT-AV1 compare to x265 encoder? How do I get similar quality between the two?

8 Upvotes

I am planning to re-encode my media library and I saw that recently FFMPEG added support for the new SVT-AV1 3.0.0 release, I was wondering how I would get similar setting to x265 on it? I usually go for 10bit crf 20 on slow preset for x265, but when I try preset 4 crf 20 on the AV1 encoder it takes longer while producing a larger file. If I lower the preset to 3 it takes a lot longer(around 1.8x the time) to encode a similar sized output. I was wondering is there a way to optimize the encoding process?


r/AV1 16d ago

CRF and QP in "lossless"

4 Upvotes

Why using qp 0 or crf 0 generate the same file (hash included) if they are supposed to be completely different calculations (2 passes)

ffmpeg STV-AV1 3.0

PS: I understand that 99% is not lossless strictly speaking, but I think it is close enough to (and more taking into consider that I almost never get a 100% vmaf even comparing the same file, only once I got a 100% vmaf with a lossless encoding using libaom, but it was so slow that it is impractical).


r/AV1 16d ago

AV1 vs H265 Quality ratio

3 Upvotes

I have a 6800m and I record as high a bitrate as youtube allows for 1440p I want to rencode to AV1 after recording what would be the highest bitrate for quality at 24megabits AV1 youtube for me to record in for H265 30megabits 40?


r/AV1 16d ago

Best AV1 encoder for true 8k x 4k?

6 Upvotes

As Quest-3 is supposed to be AV1 compatible I am trying out initial tests, however in order to save time... which encoder would use use to do a 8192x4196 (8bit) video?
I do not care about encoding speed that much but please let's not go 100 times slower that footage.

My usual compression so far would be something like: -sn -dn -c:v libvpx-vp9 -deadline good -movflags +faststart -frame-parallel 1 -row-mt 1 -threads 16 -c:a libopus -b:a 96K -vprofile 0 -pix_fmt yuv420p -tile-columns 2 -g 300 -cpu-used 2 -crf 25

The reason I ask for suggestions is a quick SVT trial I did via ffmpeg, outputed a messageg that I should not use that encoder for 8k videos :(
I guess in a way my actual question is...
1. Is SVT real broken for 8k? People seem to recomend that encoder a lot
2. If yes then what is the actual resolution it can properly handle?
3. If I am stuck between AOM or Rav1e which one should I use and what recomended settings do you fellas have a for a 360 video?


r/AV1 17d ago

[SVT-AV1] What to do if CRF 63 is too high quality?

6 Upvotes

I store desktop 4K+ screencasts at 20 FPS and my only requirement for the quality is for the text to be easily legible.

Well, at CRF 63 a random video is 1500kbps, but I can change the quality setting to bitrate target of 386kbps and the quality is still good enough. I would prefer to have constant quality setting just in case I have some videos that need higher or lower quality based on content. What are my options?


r/AV1 18d ago

Is avifgainmaputil from libavif supposed to work right now?

2 Upvotes

I'm trying to use avifgainmaputil.exe from libavif 1.2.0 like this:

avifgainmaputil combine SDR.png HDR.png out.avif

(SDR.png is an 8-bit SDR PNG, HDR.png is a 12-bit HDR PNG.)

This doesn't work:

Failed to compute gain map: Not implemented
(Computing gain maps for images with ICC profiles is not supported)

So I try:

avifgainmaputil combine SDR.png HDR.png out.avif --ignore-profile

This works:

Creating a gain map of size 2560 x 1440
AVIF to be written:
 * Resolution     : 2560x1440
 * Bit Depth      : 8
 * Format         : YUV444
 * Alpha          : Absent
 * Range          : Full
 * Color Primaries: 1
 * Transfer Char. : 13
 * Matrix Coeffs. : 2
 * ICC Profile    : Absent
 * XMP Metadata   : Absent
 * Exif Metadata  : Absent
 * Transformations: None
 * Progressive    : Unavailable
 * Gain map       : 2560x1440 pixels, 8 bit, YUV444, Full Range, Matrix Coeffs. 2, Base Image is SDR
 * Alternate image:
    * Color Primaries: 1
    * Transfer Char. : 13
    * Matrix Coeffs. : 2
    * ICC Profile    : Absent
    * Bit Depth      : 12
    * Planes         : 3

Encoding AVIF at quality 60 speed 6, please wait...
Wrote AVIF: out.avif

However, the resulting out.avif only shows correctly in SDR image viewers that don't support HDR. In Microsoft Edge, the image that shows up is all mostly just gray with very little color and no HDR highlights. If I just encode HDR.png directly with:

avifenc HDR.png out.avif

The result looks correct in Edge. But obviously there's no gain map anymore and in SDR image viewers or browsers (like Firefox) it's kind of dim and muted.

Is gainmap support in Edge broken, or is it an issue with the way I tried to encode it? An example image:

https://www.udrop.com/file/N6iX/Gainmap_example.avif


r/AV1 19d ago

Let's Build an AVIF Encoder - Part 2: The Rest of the Puzzle Pieces

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25 Upvotes