Hello everyone,

I really do appreciate the prompt support especially since it's over the weekend. So, yes this is part of using CUDA to render video on Fedora in WSL. I've tried compiling Cinelerra on Fedora within WSL on my NVIDIA GeForce RTX machine and for some reason the LADSPA dependency will not install. I'm not sure what the issue was. As part of a workaround I tried using Fedora natively on my machine in case WSL was the issue. However, there were issues with me compiling Cinelerra on Fedora due to issues installing dependencies with the configuration script; it, the script seemed to not want to work with my version of Fedora due to downloading dependencies.

Upon digging further, I can see that FFMPEG on WSL is able to successfully render video on my machine at a 1.5 to 1.75 speed up. The input video is 4K YUV4:2:2 video with 10-bit color resolution in MP4 format. Here is the command run in wsl (Fedora): "ffmpeg -y -i CINELERRA_FFMPEG_DEBUG_DUMMY_FILE.MP4 -c:v hevc_nvenc -pix_fmt yuv444p10le -profile:v main10 -cq 20 -preset p5 -c:a copy FFMPEG_output_444_10bit.mp4"
image.png
As we can see the speed up is 1.74x and in Windows Task manager we see the GPU gets pegged as expected:
image.png

However in Cinelerra i select the h265_nvenc mp4 codec in the render profile:
image.png
The render rate seems to be <.5 the framerate and the GPU usage does not look right, it looks choppy:
image.png

So here, it seems that Cinelerra may be using the GPU, but not optimally. For these reasons, I am under the assumption that:

Thoughts? Comments?

Many thanks,
Andrew Wesly

On Sun, Jan 18, 2026 at 11:24 AM Terje J. Hanssen <terjejhanssen@gmail.com> wrote:
This earlier thread may be of some background interest, where Andrew Randrianasulu guided me to build Cingg from git using the system FFmpeg and libs on openSUSE Tumbleweed-Slowroll.
 https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg07928.html


On 1/18/26 7:04 PM, Phyllis Smith via Cin wrote:
Forwarding to the mailing list instead of just me.

---------- Forwarded message ---------
From: Phyllis Smith <phylsmith2017@gmail.com>
Date: Sat, Jan 17, 2026 at 7:47 PM
Subject: Re: Cinelerra FFMPEG Questions
To: Andrew Wesly <andrewwesly@gmail.com>


1. It is a little hard to say for sure depending on how the package you installed did the build. But most likely the ffnpeg routines will be in a subdirectory of something like cinelerra-5.1/thirdparty/ffmpeg-8.0
(edited - if I remember correctly, you used Andrey's Fedora build which is the best option for you)

2. Again most likely the fedora package you are using was built using its own ffnpeg routines and not your systems version.
(edited - 3. You can not point to a different ffmpeg version unless you do you own build.)

For what purpose are you looking for the ffnpeg routines?


On Sat, Jan 17, 2026, 13:38 Andrew Wesly <andrewwesly@gmail.com> wrote:
Hello Phyllis and Cinelerra Team,

I'm looking through the CinelerraGG_Manual.pdf document for information about configuring FFMPEG and I have a few basic questions for you.

1) The manual states that Cinelerra has an FFMPEG configuration directory. However, where si that directory located on default Linux installs, Fedora specifically?

2) I installed Cinelerra pre-built from a repository. What FFMPEG does it use? That is to say, if there are two or more versions of FFMPEG installed on a system, does Cinelerra come with its own FFMPEG or does it use an FFMPEG already on the system?

3) How may I point Cinelerra to a custom FFMPEG, i.e. one of a different version?


Many thanks,
Andrew Wesly

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