RE: Trying to stream AV1 in OBS Studio

Zesko · 24 January 2024 07:08

Just FYI @cprn

Continuing the discussion from the unsolvable closed topic Trying to stream AV1 in OBS Studio:

OBS studio supports for native AV1 encoding using VA-API hardware acceleration now.

github.com/obsproject/obs-studio

obs-ffmpeg: Add AV1 support for VA-API

obsproject:master ← nowrep:vaapi-av11

opened 11:52AM - 02 May 23 UTC

nowrep

+257 -116

AV1 support for VA-API encoder. ### Description Added FFmpeg VAAPI… AV1 encoder. ### Motivation and Context ~~Draft for now as av1_vaapi FFmpeg encoder is not yet upstreamed.~~ ### How Has This Been Tested? Tested with Mesa driver. ### Types of changes - New feature (non-breaking change which adds functionality) ### Checklist: - [x] My code has been run through [clang-format](https://github.com/obsproject/obs-studio/blob/master/.clang-format). - [x] I have read the [**contributing** document](https://github.com/obsproject/obs-studio/blob/master/CONTRIBUTING.rst). - [x] My code is not on the master branch. - [x] The code has been tested. - [x] All commit messages are properly formatted and commits squashed where appropriate. - [x] I have included updates to all appropriate documentation.

cprn · 24 January 2024 12:39

AFAIU it didn’t get a new release yet. I’m currently on ffmpeg-obs 6.1.1-4 (20th Jan) and obs-studio 30.0.2-1 (14th Dec) - the only options mentioning AV1 in OBS are:

SVT-AV1 - “An encoder error occurred while recording: Encoder SVT-AV1 is taking too long to encode (timeout: 5 seconds)”
QuickSync AV1 - “Starting the output failed. Please check the log for details. Note: If you are using the NVENC or AMD encoders, make sure your video drivers are up to date.”
AOM AV1 - “An encoder error occurred while recording: Encoder AOM AV1 is taking too long to encode (timeout: 5 seconds)”

There’s no FFmpeg VAAPI AV1 yet.

Interestingly enough running the following seems to work:

ffmpeg -hwaccel vaapi -hwaccel_device /dev/dri/renderD128 -hwaccel_output_format vaapi -i input.mp4 -c:v av1_vaapi -c:a copy output.mp4

So maybe it’ll hit OBS soon.

longusnickus · 24 January 2024 18:36

it works with this OBS from AUR. i tried recording and streaming
https://www.reddit.com/r/linux_gaming/comments/18fihi5/obs_with_av1_support_is_now_in_the_aur/

or you wait for the next update

cprn · 24 January 2024 21:23

Yeah, I can confirm, streaming 4k60 to yt @ 16000 kbps results in a crisp and smooth image! Unfortunately yt still re-encodes it to vp9 so there’s some occasional blurriness here and there when there’s a lot (like a lot) happening on the screen but it seems to be working fine. Thanks!

This solves my previous thread.

longusnickus · 24 January 2024 21:50

i tried AV1 and opus for sound. fully open codecs but yt still makes VP9 out of it. i dont know how you can force AV1 encoding on yt

cprn · 25 January 2024 09:56

Yeah, you seeing VP9 as a stream viewer doesn’t mean AV1 streaming isn’t working. It’s just even when you’re successfully streaming AV1 encoded video, yt doesn’t support it yet when broadcasting to viewers, so they re-encode the video to VP9 on their servers. IDK if it’s because browsers have issue with receiving raw AV1 still or yt is just late implementing the feature but I remember hearing somewhere it’s supposed to be added this year and then they’ll be able to broadcast the exact same stream you’re uploading, without re-encoding, which should mean very very low latency - no more delay between stream and chat, yay! Well, but not yet.

longusnickus · 25 January 2024 12:57

I mean uploading AV1 encoded videos. They also get reencoded to VP9, even if there are AV1 videos on yt. but quality seems fine so i dont really care. the only thing i wanted was recording gameplay without hitting my CPU too hard and now with the AUR OBS my CPU usage nearly stays the same, when recording