GPU Rendering

[Evert Vorster]

Thanks for the update, Dan.

It's been a while since I hardware encoded video, and my card is pre-turing.

Evert Vorster
Awesome Chapters Tours
http://www.awesomechapters.com
Tel: +264 (0) 811477690


On Thu, 13 Aug 2020 at 05:42, Dan Dennedy <dan at dennedy.org> wrote:

> On Wed, Aug 12, 2020 at 8:07 AM Evert Vorster <evorster at gmail.com> wrote:
>
>> Hey Paul.
>>
>> There are ways to use GPU rendering in the output. However you typically
>> exchange quality for speed & size.
>>
>>
>>
>> ie: rendering out at q=26 on software looks better than rendering out at
>> q=26 on hardware.
>>
>> This is because the software encoders are more mature and can use
>> features in the CPU that the GPU cannot.
>>
>>
> This is not necessarily always true as of the 6th generation Turing NVENC.
> It is generally considered now as good as x264 and x265 at medium preset:
>
> https://developer.nvidia.com/blog/turing-h264-video-encoding-speed-and-quality/
>
> https://unrealaussies.com/tech/nvenc-x264-quicksync-qsv-vp9-av1/7/#NVENC-Part-2
> (you can find more studies)
>
> Turing cards are RTX 20xx and GTX 1650 Super:
>
> https://en.wikipedia.org/wiki/Nvidia_NVENC#Sixth_generation,_Turing_TU10x/TU116
>
> If you want to use HEVC to limit size while maximizing quality, Turing
> NVENC HEVC makes a lot of sense since it is so much faster than x265 or
> vp9. If you are going to output H.264 I think it is less compelling
> considering the speed of x264.
>
>
> Here is a profile that I was using to test nvenc:
>>
>> properties=x264-medium f=mp4 vcodec=h264_nvenc acodec=aac g=120
>> crf=%quality ab=%audiobitrate+'k'
>>
>>
>> Kind regards,
>> Evert Vorster
>> Awesome Chapters Tours
>> http://www.awesomechapters.com
>> Tel: +264 (0) 811477690
>>
>>
>> On Wed, 12 Aug 2020 at 17:01, Paul Smith <paulsrsmith at live.co.uk> wrote:
>>
>>> Hi,
>>>
>>> I really like KdenLive. Seems pretty intuitive to use. The on;y thing I
>>> couldn't quite figure out going through the settings is, does it use the
>>> Nvidia GPU for rendering? If not is that something on the horizon? If so
>>> I'm happy to donate towards it's development.
>>>
>>> Kind Regards
>>>
>>> Paul
>>>
>>
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