Quote:
Originally Posted by Mr_Khyron
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It's struggling at higher bitrates. Unfortunately he only tested ICQ and didn't check out CBR/VBR/CQP as well as MBBRC and ExtBRC, MB or Ext BRC can sometimes improve the quality.
He says HEVC and H264 encoder on Arc improved over ADL-S iGPU by the way.
It remains to be seen if AV1 QSV can improve over software improvements. oneVPL AV1 support looks rough at the moment.
EposVox made a mistake by not choosing the same gop length in his test, Intel AV1 QSV has a 1s seeking in his samples, means he uses a gop length of 60 (videos are 60 fps). VCE, Intel h264, x264 have a 10s seeking in his encoded videos. As for Intel h264 or h265 QSV a gop increase from 60 to 600 gop should improve the VMAF score by roughly 1 point.
Intel hardware AV1 performs really good at 3500 Kbit relative to the others in this test. It's a blocky mess in motion on NVENC or Intel h264. On higher bitrates Intel AV1 QSV detail preservation is quite poor, that's why it's losing relative to the others at higher bitrates.
Here is a frame example at 3500Kbit
Intel H264 QSV
Nvidia H264 NVENC
AMD H264 VCE
Intel AV1 QSV
x264 very slow