[Cin] my rendering is really slow

[Andrew Randrianasulu]

On Sunday, July 18, 2021, gorge rankin via Cin <cin at lists.cinelerra-gg.org>
wrote:

> Hello, just some feedback on my investigation.
>

thanks for digging & repirting back!



> I've discovered that if I use mpeg color range instead of YUV, my speed to
> render out to yuv420p/nvenc are same as shotcut (for reference purposes).
> Near realtime (10 sec video renders in 10 seconds with no edits).   Colors
> of output video seem to be same as input.  I've been using kcolorchooser
> and I cant find a diff.
>
> I see in the manual, that 'mpeg' offers less color range than jpeg, but my
> outputs look just like my input videos.  If there is a difference, I
> certainly cannot see it.
>

i think mpeg4/h264 use same limited (mpeg) color range, so nothing to loose
from default already  compressed in h264 input...


>
> However, the speed only holds if I use 60fps video or less. Making color
> changes, brightness, zoom all seem to be reasonable and on par to what I'm
> used to seeing in shotcut.
>
> However, if my source material is over 60 FPS , the speed of encoding
> significantly drops off for something as simple as "trim".
>

does plain ffmpeg/shotcut encode such files better (faster) with same
nvenc?


> Going forward, I can convert my sources in ffmpeg, no biggie.  I'll have
> to keep my sources tho for future 'just in case'.
>
> Attached is a photo of my settings that I'm using for OBS and cin with
> nvenc for going forward.
>

thanks, it seems current nvenc might have some not-so-obvious limitations,
might be worth mentioning in manual (with hw description and driver
version)

>
> [image: my-cin-setup-for-obs-videos.png]
>
>
>
> On Sat, Jul 17, 2021 at 12:22 AM Phyllis Smith via Cin <
> cin at lists.cinelerra-gg.org> wrote:
>
>> There are no errors at all printed to the console if I launch cin from
>>> the terminal.
>>>
>> Just FYI, on a non-Nvidia laptop, you will get the following errors on
>> the terminal where there is no Nvidia graphics card:
>>
>>   [h264_nvenc @ 0x7f0780085a40] Cannot load libcuda.so.1
>>   FFMPEG::open_encoder  err: Operation not permitted
>>   int FFMPEG::open_encoder(const char*, const char*):
>>   open failed h264_nvenc:/tmp/testnvenc.mp4
>>
>> So, it sure looks like  "nvenc" is working in Gorge's case.
>>
>>>
>>>>> Also in the nvidia control panel, and I can see this:
>>>>>
>>>>> But the percentage will hit up to 30-50% many times.
>>>>>
>>>>> --
>> Cin mailing list
>> Cin at lists.cinelerra-gg.org
>> https://lists.cinelerra-gg.org/mailman/listinfo/cin
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20210718/203dddaf/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: my-cin-setup-for-obs-videos.png
Type: image/png
Size: 199539 bytes
Desc: not available
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20210718/203dddaf/attachment-0001.png>