Hi everyone, I have one doubt regarding using parallel mode in x265.* Is it necessary to use --no-wpp when we are using --frame-threads more than 1? *If I did that then FPS is reduces. With --wpp and --frame-threads 1, FPS was very less, there is no option like --threads in x265 that is used with --wpp.
Thanks On Fri, Mar 8, 2019 at 12:10 AM Sunil Kumar <[email protected]> wrote: > Thanks Alex! Can you share your command that you are using? > > On Thu, Feb 28, 2019 at 8:06 PM Alex Giladi <[email protected]> wrote: > >> Sunil, all, >> From our experiments a few months ago, gains from AVX-512 were noticeable >> (>5%) at veryslow preset and 4K resolution. >> Best, >> Alex. >> >> On Thu, Feb 28, 2019, 06:06 Sunil Kumar <[email protected]> wrote: >> >>> Thanks Mario and Kalyan for reply, >>> I have checked with same command avx512 is giving more FPS compared to >>> avx2. I am not able to understand with increasing the number of cores the >>> FPS is reducing after certain point . >>> How can i decide how many cores are need to use for best performance? >>> >>> About preset i have used it but as I mentioned in mail it will reduced >>> the quality of video right? By default *preset* values is 5 (medium) >>> same is with *crf (using 52 is giving best fps at the cost of >>> quality). * >>> >>> Any *system level tuning *that help in increasing the performance? >>> >>> Can you also please give any example commands in general. How can I use >>> 2 pass (doest it help in improving the performance) >>> Thanks, >>> >>> On Thu, Feb 28, 2019 at 3:33 PM Kalyan Goswami < >>> [email protected]> wrote: >>> >>>> Hi Sunil, >>>> >>>> From the very first glace of your command line, I think you have missed >>>> the --preset option. [ >>>> https://x265.readthedocs.io/en/default/presets.html]. You can try the >>>> ultrafast or superfast preset for higher performance. Regarding the >>>> overview of different CLI options plz check the x265 documentation: >>>> https://x265.readthedocs.io/en/default/cli.html >>>> >>>> Thanks, >>>> Kalyan Goswami, PhD >>>> Video Architect @ MulticoreWare >>>> http: <http://www.multicorewareinc.com/>//www.multicorewareinc.com >>>> <http://www.multicorewareinc.com/> >>>> +91 9884989331 >>>> >>>> >>>> On Thu, Feb 28, 2019 at 3:01 PM Mario *LigH* Rohkrämer <[email protected]> >>>> wrote: >>>> >>>>> 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 >>>>> > >>>>> > >>>>> > _______________________________________________ >>>>> > x265-devel mailing list >>>>> > [email protected] >>>>> > https://mailman.videolan.org/listinfo/x265-devel >>>>> > >>>>> >>>>> >>>>> -- >>>>> >>>>> Fun and success! >>>>> >>>>> Mario *LigH* Rohkrämer >>>>> maito:[email protected] >>>>> _______________________________________________ >>>>> x265-devel mailing list >>>>> [email protected] >>>>> https://mailman.videolan.org/listinfo/x265-devel >>>>> >>>> _______________________________________________ >>>> x265-devel mailing list >>>> [email protected] >>>> https://mailman.videolan.org/listinfo/x265-devel >>>> >>> _______________________________________________ >>> x265-devel mailing list >>> [email protected] >>> https://mailman.videolan.org/listinfo/x265-devel >>> >> _______________________________________________ >> x265-devel mailing list >> [email protected] >> https://mailman.videolan.org/listinfo/x265-devel >> >
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