Hello all. I recently got a computer with an nvidia card, so I've been trying out the experimental nvenc encoding. I regularly spit out 720p 59.94fps video each week, so I adapted the settings I use with the nvenc_h264 encoder like this (I use crf=18 when setting up the render):

properties=x264-medium f=mp4 vcodec=nvenc_h264 acodec=aac ab=192k g=120 crf=%quality

This works really well when using the appimage of 20.12.2. I'm able to get an hour of video rendered down in about 6-10 minutes or so, with an fps of around 600 or so. This is a massive improvement for me (this would normally take over an hour of CPU render time on my old computer).

When trying the appimage of 22.04.1, it complained that nvenc_h264 wasn't supported, so I switched it to h264_nvenc. With this setting, I'm getting about 1/3 of the render performance, averaging around 200fps and around a 20 minute render time with the same project. I tried the flatpak of 22.04.1 with the same settings and I get an even longer render time, with about 170-180fps.

Is something drastically different with melt 7 and/or the h264_nvenc codec that can account for the regression in render times? Should I file a bug? Or is this all to be expected.

you can try to post some "benchmarks" here ( https://invent.kde.org/multimedia/kdenl ... ate=opened ) to help others to understand what is happening...
write also your distro/version and hardware you are using.

Gotcha. I'll see if I can get some benchmarks up soon. Sorry, I know better than to leave the details off.

I'm running PopOS 22.04 with nvidia driver 510.68.02. What other details would be helpful?