Question / Help How to disable ffmpeg vaapi?

M

mathew7

New Member
Hello,
So, I just got a 3900x for a 2nd transcoding PC, which I made to work immediately with NDI plugin. Win10 PC -> Ubuntu PC -> VLC PC.
But no matter what parameters I sent to libx264 (not even preset), quality (horrible 6Kbps) and CPU usage (<10%?) does not change. It took me 4-5 hours to realize that my GT1030s temperature goes up 5-6C whenever I start a stream; so it means NVENC is used.

Logs say FFMPEG with VAAPI is supported, but I can't pass "hwaccel none" to ffmpeg. How can I disable this? All searches lead me to "enabling" HW accel, not disabling.

I'm using Recording->Custom output (ffmpeg) with output URL. I don't see any HW acceleration options, and I can only pass transport/video/audio parameters.
Trying to remove libvaapi or libvdpau1 wants to also remove ffmpeg and obs-studio, so I need a runtime option (no, I don't want to recompile; I could, but I don't want that maintenance nightmare)

Have a nice day!
 
Harold

Harold

Active Member
GT1030s don't actually have nvenc.

The GPU usage spike may come from increased GPU use for scene composition.
 
M

mathew7

New Member
Harold said:
GT1030s don't actually have nvenc.

The GPU usage spike may come from increased GPU use for scene composition.
Click to expand...
Can't be....I have a single NDI source which is shown in OBS screen even when recording is off. I'm at the proof-of-concept stage.
It may not be "NVENC", but deffinately an h264 GPU acceleration.
CPU usage is at single-digit on a 3900x and preset changes nothing.
 
M

mathew7

New Member
Interesting, I thought it's a half-disabled 1050 with partial (HW there but disabled/reduced) nvenc, but I see it's a completely different chip.
Anyways, I tried with actual streaming to twitch and I see GPU temps still rise (but presets can be changed with proportional quality and CPU usage).
So, "recording" to mpegts+UDP seems to have a CPU usage like ultrafast, but even ultrafast to twitch has better quality than custom recording.
 
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