YouTube Stream No Longer 4K60 with NVENC AV1

[Th3Birdman]

Thread title.

I have tested this multiple times. When using NVENC AV1, YouTube streams will be forced into 30 fps.

Once I switched back to H.264, the stream was in 4K60.

I don't know if there was an OBS update that has caused this, but all of a sudden, I cannot stream at 60 FPS while using AV1 no matter what bitrate I choose (I normally stream at CBR 50000 bitrate). I've tested this at CBR 28000/60000/40000-- all result in a 4K30 FPS vod/stream.

Is this a known issue?

 

[Th3Birdman]

Can confirm, this is an OBS-related problem: Latest version (32.0.1) is causing this issue.

Rolled back to 32.0.0 and NVENC AV1 is streaming in 4k60 as normal again.

 

[PaiSand]

Log files from both tests (32 and 32.0.1) are needed. One log file test from each version is enough.

 

[Th3Birdman]

Sorry, meant to state the rollback was to 31.1.2, as the rollback to 32.0.0 still refuses to output 4K60.

31.1.2 is the latest build that outputs 4K60 using the NVENC AVI encoder.

Log files from both tests (32 and 32.0.1) are needed. One log file test from each version is enough.

I'm just now seeing your message, sorry about that. Here are the logs from 32.0.1 and 31.1.2.

 

[PaiSand]

In 31.1.2 the log files you're using AV1 and in the 32.0.1 you're using H264 (both nvidia encoders)
You said you have issues with the AV1 encoder, so both tests need to be with the same AV1 encoder. Do a test with the AV1 encoder in OBS 32.0.1 and attach it here.
You can use a OBS in portable mode, so you don't mess with your working installation. https://obsproject.com/kb/portable-mode

 

[Th3Birdman]

Perhaps I'm misunderstanding you (or something else), but both those log files clearly say the codec being used is AV1:

Did you misread these or am I overlooking something?

 

[PaiSand]

23:50:03.683: codec: H264
23:50:03.683: rate_control: CBR
23:50:03.683: bitrate: 50000

 

[Th3Birdman]

That part of the log was me changing the settings AFTER the AV1 stream test, so that I could run a different test.

Please look at the screenshots I posted again-- you'll see those were my settings while streaming

 

[prgmitchell]

Each log shows the resolution (3840x2160) and FPS (60) being used, there have been no other reports of this, and streaming with NVENC AV1 to Youtube has been tested as a response to this thread....all seems fine.