[x265] Less FPS

[Sunil Kumar]

I tried your command, but its giving:
*x265 [warning]: poc:49, VBV underflow (-539040 bits)0:01:36*
and 2.45 fps only

On Sun, Mar 10, 2019 at 12:25 AM Alex Giladi <alex.giladi at gmail.com> wrote:

> x265 --aq-mode 3  --aud --bframes=5  --chromaloc 2 --colormatrix bt2020nc
> --colorprim bt2020 --csv-log-level=4 --ctu 64 --dynamic-rd 4 --fps 59.97
> --frame-threads 1 --input-depth 10 --input-res 3840x2160 --keyint 120
> --level=51 --log-level=4 --lookahead-slices=0
> --master-display="G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,50)"
> --max-cll=1000,399  --min-keyint 60
> --no-amp --no-cutree --no-high-tier --no-interlace --no-open-gop
> --no-opt-qp-pps --no-opt-ref-list-length-pps --no-rect --output-depth 10
> --preset veryslow --profile main10 --qg-size 8 --rc-lookahead 180 --rd 4
> --rdoq-level 1 --ref=4
> --repeat-headers --ssim-rd --subme 7 --transfer 16 --weightb --input
> <..>.yuv --input-res 3840x2160
> --output <...>.265 --csv <...>.csv
>
> On Thu, Mar 7, 2019 at 1:40 PM Sunil Kumar <skgola1997 at gmail.com> wrote:
>
>> Thanks Alex! Can you share your command that you are using?
>>
>> On Thu, Feb 28, 2019 at 8:06 PM Alex Giladi <alex.giladi at gmail.com>
>> 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 <skgola1997 at gmail.com> 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 <
>>>> kalyan at multicorewareinc.com> 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 <
>>>>> contact at ligh.de> 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
>>>>>> > x265-devel at videolan.org
>>>>>> > https://mailman.videolan.org/listinfo/x265-devel
>>>>>> >
>>>>>>
>>>>>>
>>>>>> --
>>>>>>
>>>>>> Fun and success!
>>>>>>
>>>>>> Mario *LigH* Rohkrämer
>>>>>> maito:contact at ligh.de
>>>>>> _______________________________________________
>>>>>> x265-devel mailing list
>>>>>> x265-devel at videolan.org
>>>>>> https://mailman.videolan.org/listinfo/x265-devel
>>>>>>
>>>>> _______________________________________________
>>>>> x265-devel mailing list
>>>>> x265-devel at videolan.org
>>>>> https://mailman.videolan.org/listinfo/x265-devel
>>>>>
>>>> _______________________________________________
>>>> x265-devel mailing list
>>>> x265-devel at videolan.org
>>>> https://mailman.videolan.org/listinfo/x265-devel
>>>>
>>> _______________________________________________
>>> x265-devel mailing list
>>> x265-devel at videolan.org
>>> https://mailman.videolan.org/listinfo/x265-devel
>>>
>> _______________________________________________
>> x265-devel mailing list
>> x265-devel at videolan.org
>> https://mailman.videolan.org/listinfo/x265-devel
>>
> _______________________________________________
> x265-devel mailing list
> x265-devel at videolan.org
> https://mailman.videolan.org/listinfo/x265-devel
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.videolan.org/pipermail/x265-devel/attachments/20190310/a95238c1/attachment.html>