bytedeco/javacv

FFmpegFrameGrabber grabber long time consuming

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#1,429 opened on May 14, 2020

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Description

I had a problem making the recording screen. When I capture the screen and execute grabber.grab(), it takes me about 80 milliseconds. The capture is 1920 * 1080, 30 frames. My computer CPU is i9, The time-consuming code is

   grabber = new FFmpegFrameGrabber("desktop");
   grabber.setImageWidth(1920);
   grabber.setImageHeight(1080);
   grabber.setFrameRate(30);
   grabber.setFormat("gdigrab");

   capturedFrame = grabber.grab();   //execute this code takes me about 80 milliseconds

.What's the solution？

Contributor guide

Research direction
Profile the grab() call to identify bottlenecks. Consider adjusting FFmpeg options like reducing pixel format or using a different input method.
Tech stack
java
Domain
desktop
Issue type
Performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
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
Java
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50