FFmpeg on jetson

[MMMMMine]

hello, my server is jetson nano
--jetpack:5.0.1
--cuda:11.4.14
what dependencies do I need to get FFmpegFrameGrabber to work with gpu

i use h264_cuvid/hevc_cuvid, it still worked with cpu, this is my dependencies
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacv</artifactId>
<version>1.5.7</version>
</dependency>
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>ffmpeg-platform</artifactId>
<version>5.0-1.5.7</version>
</dependency>

[saudet]

Check the log for any warnings.

[MMMMMine]

Check the log for any warnings.

no warnings. it worked normally with cpu , not gpu.
i use this jar run on x86_64-linux , it worked with gpu.

[MMMMMine]

@saudet I installed nvidia ffmpeg on jetson nano and run ffmpeg -c:v hevc_nvv4l2dec -vf fps=1 image_%05d.jpg
it worked without cpu and outputted image successfully , does FFmpegFrameGrabber support it and how to set option ?

[saudet]

Hum, it just looks like CUDA wasn't enabled on that platform.
I've just done that in commit bytedeco/javacpp-presets@5877628.
Please give it a try with the snapshots: http://bytedeco.org/builds/

[MMMMMine]

I tried, but it didn't work.
NVIDIA officially states that jetson ffmpeg uses a separate codec module, does that mean it is not accelerated by CUDA?

[saudet]

We need a libnvcuvid.so.1 library that supports the GPU, yes. I suppose the version of FFmpeg they provide is a proprietary fork of the original project, and we don't have access to the source code, but if they provide binaries for its libraries as well, we can use those with JavaCV and JavaCPP by setting the "org.bytedeco.javacpp.pathsFirst" system property to "true". They need to be for the same exact version of FFmpeg though. If not, you'll need to build the JavaCPP Presets for FFmpeg from source:
https://github.com/bytedeco/javacpp-presets#build-instructions

[MMMMMine]

Thank you for your reply. I will continue to explore. This is difficult for me.