The JVM may crash unexpectedly while merging two audio files

[CharlieAJing]

here is part of the erro info in hs_error_pid.log

jdk version 11

A fatal error has been detected by the Java Runtime Environment:
SIGSEGV (0xb) at pc=0x00007f5a92c1229d, pid=3206, tid=34567

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Problematic frame:
C [libswresample.so.4+0x1129d]

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--------------- T H R E A D ---------------

Current thread (0x00007f5a2bfd9800): JavaThread "Record-IO-5" [_thread_in_native, id=34567, stack(0x00007f59f2ff8000,0x00007f59f30f9000)]

Stack: [0x00007f59f2ff8000,0x00007f59f30f9000], sp=0x00007f59f30f6a78, free space=1018k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [libswresample.so.4+0x1129d]

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
J 16021 org.bytedeco.ffmpeg.global.swresample.swr_convert(Lorg/bytedeco/ffmpeg/swresample/SwrContext;Lorg/bytedeco/javacpp/PointerPointer;ILorg/bytedeco/javacpp/PointerPointer;I)I (0 bytes) @ 0x00007f5a7df33a71 [0x00007f5a7df339e0+0x0000000000000091]
J 44183 c2 org.bytedeco.javacv.FFmpegFrameRecorder.recordSamples(II[Ljava/nio/Buffer;)Z (1878 bytes) @ 0x00007f5a7f2b9ce4 [0x00007f5a7f2b8fc0+0x0000000000000d24]
J 16044 c2 org.bytedeco.javacv.FFmpegFrameRecorder.record(Lorg/bytedeco/javacv/Frame;)V (34 bytes) @ 0x00007f5a7df66048 [0x00007f5a7df65f60+0x00000000000000e8]
......

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Internal exceptions (20 events):
Event: 44605.237 Thread 0x00007f5a33748800 Exception <a 'java/lang/InterruptedException'{0x00000007fb1f2510}> (0x00000007fb1f2510) thrown at [./src/hotspot/share/runtime/objectMonitor.cpp, line 1736]
Event: 44605.237 Thread 0x00007f5a4dbbf000 Exception <a 'java/net/SocketException'{0x0000000792e85960}: Socket closed> (0x0000000792e85960) thrown at [./src/hotspot/share/prims/jni.cpp, line 637]
Event: 44605.849 Thread 0x00007f5a57b59800 Exception <a 'java/io/IOException'{0x0000000791fd69d8}> (0x0000000791fd69d8) thrown at [./src/hotspot/share/prims/jni.cpp, line 616]
Event: 44605.849 Thread 0x00007f5a57b59800 Exception <a 'java/io/IOException'{0x0000000791fdc608}> (0x0000000791fdc608) thrown at [./src/hotspot/share/prims/jni.cpp, line 616]
Event: 44605.920 Thread 0x00007f5a0ca91000 Exception <a 'java/net/SocketException'{0x000000079c84d6c8}: Socket closed> (0x000000079c84d6c8) thrown at [./src/hotspot/share/prims/jni.cpp, line 637]
Event: 44608.772 Thread 0x00007f5a4d8b4000 Exception <a 'java/net/SocketException'{0x00000007860fb378}: Socket closed> (0x00000007860fb378) thrown at [./src/hotspot/share/prims/jni.cpp, line 637]
Event: 44608.772 Thread 0x00007f5a4d8b7800 Exception <a 'java/lang/InterruptedException'{0x0000000787efaae8}> (0x0000000787efaae8) thrown at [./src/hotspot/share/runtime/objectMonitor.cpp, line 1736]
Event: 44608.772 Thread 0x00007f5a2b52e800 Exception <a 'java/lang/InterruptedException'{0x00000007c9ccecf0}> (0x00000007c9ccecf0) thrown at [./src/hotspot/share/runtime/objectMonitor.cpp, line 1736]
Event: 44608.772 Thread 0x00007f5a4d8b7800 Exception <a 'java/net/SocketException'{0x0000000787efadf0}: Socket closed> (0x0000000787efadf0) thrown at [./src/hotspot/share/prims/jni.cpp, line 637]
Event: 44609.755 Thread 0x00007f5a5f0c8000 Exception <a 'java/net/SocketException'{0x000000078df38180}: Socket closed> (0x000000078df38180) thrown at [./src/hotspot/share/prims/jni.cpp, line 637]
Event: 44610.850 Thread 0x00007f5a57b59800 Exception <a 'java/io/IOException'{0x000000077e6e5808}> (0x000000077e6e5808) thrown at [./src/hotspot/share/prims/jni.cpp, line 616]
Event: 44610.850 Thread 0x00007f5a57b59800 Exception <a 'java/io/IOException'{0x000000077e6f7f38}> (0x000000077e6f7f38) thrown at [./src/hotspot/share/prims/jni.cpp, line 616]
Event: 44615.854 Thread 0x00007f5a57b59800 Exception <a 'java/io/IOException'{0x000000076e946238}> (0x000000076e946238) thrown at [./src/hotspot/share/prims/jni.cpp, line 616]
Event: 44615.855 Thread 0x00007f5a57b59800 Exception <a 'java/io/IOException'{0x000000076e9543d0}> (0x000000076e9543d0) thrown at [./src/hotspot/share/prims/jni.cpp, line 616]
Event: 44618.341 Thread 0x00007f5a4db77000 Exception <a 'java/net/SocketException'{0x00000007ff70e138}: Socket closed> (0x00000007ff70e138) thrown at [./src/hotspot/share/prims/jni.cpp, line 637]
Event: 44618.341 Thread 0x00007f5a4db78000 Exception <a 'java/lang/InterruptedException'{0x00000007fd71a510}> (0x00000007fd71a510) thrown at [./src/hotspot/share/runtime/objectMonitor.cpp, line 1736]
Event: 44618.341 Thread 0x00007f5a4db78000 Exception <a 'java/net/SocketException'{0x00000007fd71a818}: Socket closed> (0x00000007fd71a818) thrown at [./src/hotspot/share/prims/jni.cpp, line 637]
Event: 44619.074 Thread 0x00007f5a602c8000 Exception <a 'java/net/SocketException'{0x00000007fc51b568}: Socket closed> (0x00000007fc51b568) thrown at [./src/hotspot/share/prims/jni.cpp, line 637]
Event: 44620.855 Thread 0x00007f5a57b59800 Exception <a 'java/io/IOException'{0x00000007f24d8c78}> (0x00000007f24d8c78) thrown at [./src/hotspot/share/prims/jni.cpp, line 616]
Event: 44620.856 Thread 0x00007f5a57b59800 Exception <a 'java/io/IOException'{0x00000007f24e8b28}> (0x00000007f24e8b28) thrown at [./src/hotspot/share/prims/jni.cpp, line 616]

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here is my code

try (
	FrameGrabber grabberL = new FrameGrabber(task.getLeftChannelInputFile());
	FrameGrabber grabberR = new FrameGrabber(task.getRightChannelInputFile());
	FFmpegFrameRecorder recorder = createRecorder(task.getOutputFile(), 2)
) {
	grabberL.start();
	grabberR.start();
	recorder.start();

	Frame frameL = getFirstFrame(grabberL);
	Frame frameR = getFirstFrame(grabberR);
	if (ObjectUtils.allNull(frameL, frameR)){
		log.error("^mixRecord^ all frame is null,taskId={}", task.getTaskId());
        return true;
    }

	LocalDateTime expireTime = startTime.plusSeconds(recordConfig.getJniMixTimeoutSeconds());
	while (true) {
		if (expireTime.isBefore(LocalDateTime.now())) {
			log.error("^mixRecord^ timeout, taskId:{}", task.getTaskId());
			break;
		}
		Buffer[] samples = new Buffer[2];
		if (frameL == null && frameR == null) {
			break;
		} else if (frameL != null && frameR != null) {
			samples[0] = frameL.samples[0]; 
			samples[1] = frameR.samples[0];
		} else if (frameL != null) {
			samples[0] = frameL.samples[0];
			samples[1] = createSilenceSampleIfAbsent(null, frameL.samples[0].capacity());
		} else {
			samples[0] = createSilenceSampleIfAbsent(null, frameR.samples[0].capacity());
			samples[1] = frameR.samples[0];
		}

		Frame mixedFrame = new Frame();
		mixedFrame.samples = samples;
		mixedFrame.sampleRate = task.getOutputFile().getSampleRate();
		mixedFrame.audioChannels = 2;
		mixedFrame.opaque = Objects.requireNonNull(ObjectUtils.defaultIfNull(frameL, frameR).opaque);
		recorder.record(mixedFrame);

		frameL = grabberL.grab();
		frameR = grabberR.grab();
	}
	return true;
} catch (Exception e) {
	...
	return false;
}


@NotNull
private static FFmpegFrameRecorder createRecorder(OutputFile outputFile, int audioChannels) {
	FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(outputFile.getFile(), audioChannels);
	recorder.setSampleRate(outputFile.getSampleRate());
	recorder.setFormat(outputFile.getFormat());
	return recorder;
}

@Getter
private static class FrameGrabber extends FFmpegFrameGrabber{

	private final InputFile inputFile;

	public FrameGrabber(InputFile inputFile) {
		super(inputFile);
		this.inputFile = inputFile;
		this.setFormat(inputFile.getFormat());
		this.setAudioCodec(inputFile.getAudioCodec());
		this.setSampleRate(inputFile.getSampleRate());
    }

}

private static class InputFile extends File {
    //ignore
}

private Buffer createSilenceSampleIfAbsent(Buffer silenceSample, int capacity) {
	if (silenceSample == null || silenceSample.capacity() != capacity) {
		ShortBuffer silentBuffer = ShortBuffer.allocate(capacity);
		for (int i = 0; i < capacity; i++) {
			silentBuffer.put(i, (short) 0);
		}
		silenceSample = silentBuffer;
    }
    return silenceSample;
}

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maven

org.bytedeco javacv 1.5.9
org.bytedeco javacv-platform 1.5.9

[saudet]

Please try to set the "org.bytedeco.javacpp.nopointergc" system property to "true".