PointerScope not work

[lixiangflyin]

I use javacv to sement audio and operation with muti thread.
Offen OOM. AND use pointerScope, but still OOM.

try (PointerScope scope = new PointerScope()) {
    FFmpegLogCallback.set();
    CustomFFmpegFrameGrabber customFFmpegFrameGrabber = new 
   CustomFFmpegFrameGrabber(rtmpUrl, 3));
    customFFmpegFrameGrabber.getFFmpegFrameGrabber().subscribeBlockCallBack(this::onTaskInterrupt);
    ByteArrayOutputStream outputStream = null;
    CustomFFmpegFrameRecorder recorder = null;
    try {
        if (!canConnected(customFFmpegFrameGrabber)) {
            return;
        }

        outputStream = new ByteArrayOutputStream();
        recorder = getFrameRecorder(outputStream, customFFmpegFrameGrabber.getFFmpegFrameGrabber());
        recorder.startUnsafe(customFFmpegFrameGrabber.getFFmpegFrameGrabber().getFormatContext());
       

       while (true) {
          AVPacket frame = customFFmpegFrameGrabber.getFFmpegFrameGrabber().grabPacket();
          //if null and continue
          if (frame == null) {
            break;
          }

        recorder.recordPacket(frame);

        ThreadUtils.sleep(0);
    }

    } catch (FrameGrabber.Exception e) {
        
    } catch (PgFFmpegFrameRecorder.Exception e) {
        log.error("recorder exception ", e);
    } catch (Exception e) {
        log.error("other error ", e);
    } finally {
        //close recorder
        if (recorder != null) {
            stopRecord(recorder);
        }
        //close grabber
        if (customFFmpegFrameGrabber.getFFmpegFrameGrabber() != null) {
            try {
                customFFmpegFrameGrabber.getFFmpegFrameGrabber().releaseUnsafe();
            } catch (FrameGrabber.Exception e) {
                log.error("grabber shutdown error ", e);
            }
        }
        if (outputStream != null) {
            try {
                outputStream.close();
            } catch (Exception e) {
                log.error("output stream close error", e);
            }
        }
    }

}

[saudet]

FFmpegFrameGrabber and FFmpegFrameRecorder are not thread safe. Do not try to use them from multiple threads.

[lixiangflyin]

but I must operation many streams at the same time.

If i use thread-safe, programs will block.

[saudet]

Ok, but please reproduce the issue with a single stream.

[lixiangflyin]

Can you detail? Share your idea? I have not understand.

[saudet]

If it doesn't happen with a single stream, then the problem is with your threads. So, please make sure your issue happens with a single stream.

[lixiangflyin]

ok, I try

[saudet]

I've added synchronized and PointerScope to the methods of FFmpegFrameGrabber and FFmpegFrameRecorder in commits cbe7ccd and 28b90ef. That should solve the problems you're having so please give it a try with the snapshots: http://bytedeco.org/builds/

[saudet]

Duplicate of #1434

[saudet]

Duplicate of #1383