[x265] Less FPS

[Mario *LigH* Rohkrämer]

Hi Sunil.

Just a general note: AVX512 is not certainly faster than AVX2 on every 
CPU model. There have been a few tests e.g. in the doom9 video forum. So 
don't expect miracles.

Knowing your exact CPU model may help estimating if there can be a 
speedup, or if it is a model which may e.g. throttle too much to avoid 
overheating.

But wait for more experienced replies than mine...


Sunil Kumar schrieb am 28.02.2019 um 09:17:
> Hi,
> I am new to media encoding, I have heard that x265 is a very efficient 
> encoding tool on Intel's platform with avx512 enabled. But I am not able 
> to get good FPS with avx512 enable. Can you please help me improving the 
> performance?
> 
> 1) I have tried with core pinning but it seems like using more cores is 
> not beneficial, even reducing the FPS, How can we decide the no. of 
> cores for best FPS in multi socket system.
> 
> 2) Can suggest the command for efficient performance like the best 
> command line parameters or performance parameters (if we use preset then 
> it will compromise with the quality of video and same with CRF, help in 
> deciding best thing).
> 
> 3) How can I run in parallel or in multi pass (2 pass) please give an 
> command example.
> the command i was using is:
> 
> ./x265 --input <video.yuv> --input-res 1920x1080 --fps 50 --output 
> out.hevc  --max-merge 3 --no-tskip --no-rect --frame-threads 16 --pools 
> "+,-" --bitrate 16000 --asm avx512
> 
> how can we decide the --fps for input video? max-merge, no-tskip, 
> fram-threads etc.
> Please give command so that it will help me out.
> Thanks,
> Sunil
> 
> 
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> 


-- 

Fun and success!

Mario *LigH* Rohkrämer
maito:contact at ligh.de