bytedeco/javacv

x11grab gpu accelerate

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#2,170 opened on Jan 11, 2024

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Description

I want to use gpu acceleration when record x11 screen, code below:

FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(":0.0");
grabber.setFormat("x11grab");
grabber.setFrameRate(20);
grabber.setOption("hwaccel", "cuda");
grabber.setOption("hwaccel_device", "0");

when i see output in nvidia-smi, but the process is not showing up. is something wrong with the code ? BTW, the command line takes effect ffmpeg -f x11grab -framerate 20 -hwaccel cuda -i :0.0 out.mp4

Contributor guide

Research direction
Check how FFmpegFrameGrabber passes options to FFmpeg. Verify that hwaccel options are supported in JavaCV's FFmpeg binding and whether they are correctly passed as codec options.
Tech stack
java
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaFFmpeg
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
55