bytedeco/javacv

FFmpegFrameGrabber videocapture require memory increase

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#2,249 opened on Jul 8, 2024

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Description

when I use FFmpegFrameGrabber to capture from rtsp video, I notice the memory will be increase soon, it looks unnormal.

os: windows jdk:1.8 javacv:1.5.11-SNAPSHOT

package com.example.demo.server;

import lombok.extern.slf4j.Slf4j;
import org.bytedeco.javacv.FFmpegFrameGrabber;
import com.carrotsearch.sizeof.RamUsageEstimator;

@Slf4j
class demo1 {
    public static void main() throws FFmpegFrameGrabber.Exception {
        for (int i=0;i<100;i++){
        FFmpegFrameGrabber grabber;
        grabber = new FFmpegFrameGrabber("rtsp://128.8.84.224:18554/stream");
        try {
            grabber.start();
        } catch (FFmpegFrameGrabber.Exception e) {
            e.printStackTrace();
        }

        long size1 = RamUsageEstimator.sizeOf(grabber);
        log.info("#### start state grabber cost "+size1+" bytes");

        grabber.stop();
        grabber.release();
        }
    }
}

the memory will keep increasing

Contributor guide

Research direction
Investigate memory leak in FFmpegFrameGrabber by tracing native resource allocation during start and stop cycles. Check if release() fully deallocates native memory and if any static caches accumulate.
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.
1-2 days
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.
50