Question

如果在录制视频时将应用程序最小化-一切正常，但是一旦我部署了该应用程序，ерут就会出现此错误：

E/AndroidRuntime: FATAL EXCEPTION: CameraX-video encoding thread
Process: <pkgname>, PID: 12340
java.lang.IllegalStateException
    at android.media.MediaCodec.native_dequeueOutputBuffer(Native Method)
    at android.media.MediaCodec.dequeueOutputBuffer(MediaCodec.java:2698)
    at androidx.camera.core.VideoCapture.videoEncode(VideoCapture.java:604)
    at androidx.camera.core.VideoCapture$2.run(VideoCapture.java:348)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:214)
    at android.os.HandlerThread.run(HandlerThread.java:65)

或如果我停止在onPause videoCapture?.stopRecording()上录制，则会出现此错误：

E/AndroidRuntime: FATAL EXCEPTION: CameraX-
Process: <pkgname>, PID: 9489
java.lang.IllegalStateException
    at androidx.core.util.Preconditions.checkState(Preconditions.java:96)
    at androidx.core.util.Preconditions.checkState(Preconditions.java:108)
    at androidx.camera.camera2.impl.Camera.openCaptureSession(Camera.java:874)
    at androidx.camera.camera2.impl.Camera.onUseCaseReset(Camera.java:625)
    at androidx.camera.camera2.impl.Camera$11.run(Camera.java:611)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:214)
    at android.os.HandlerThread.run(HandlerThread.java:65)

如何在最小化应用程序的同时停止录制视频？

这是我的代码：我收集配置：

CameraX.unbindAll()
    getDisplayMetrics()
    setPreviewConfig()

    when (typeCapture) {
        TYPE_IMAGE -> {
            setImageCapture()
            CameraX.bindToLifecycle(this, preview, imageCapture)
        }
        TYPE_VIDEO -> {
            setVideoCapture()
            CameraX.bindToLifecycle(this, preview, videoCapture)
        }
    }

设置videoConfig和videoCapture：

val videoCaptureConfig = VideoCaptureConfig.Builder().apply {
        setLensFacing(lensFacing)
        setTargetAspectRatioCustom(screenAspectRatio)
        setTargetRotation(rotation)
    }.build()

    videoCapture = VideoCapture(videoCaptureConfig)

然后我开始录制视频：

videoCapture?.startRecording(videoFile, 
CameraXExecutors.mainThreadExecutor(), recordListener)

在onPause（）上，我得到的错误已在上文中描述

谢谢

Answer 1

在onPause上停止视频时，我遇到了相同的错误。为了解决这个问题，我在调用super.onPause()之前添加了一个延迟（请参阅：android: camera onPause/onResume issue）。

声明videoSavedListener

private VideoCapture.OnVideoSavedListener videoSavedListener= new VideoCapture.OnVideoSavedListener() {
    @Override
    public void onVideoSaved(@NonNull File file) {
        if(isRecording) {
            isRecording = false;
            // Do whatever you want
        }
    }

    @Override
    public void onError(@NonNull VideoCapture.VideoCaptureError videoCaptureError, @NonNull String message, @Nullable Throwable cause) {

    }
};

添加onClickListener

button.setOnClickListener(v -> {
    if(!isRecording){
        videoCapture.startRecording(videoFile, CameraXExecutors.mainThreadExecutor(), videoSavedListener);
        isRecording = true;
     }else{
        videoCapture.stopRecording();
     }
});

重写onPause（）

    @SuppressLint("RestrictedApi")
    @Override
    public void onPause() {
        if(isRecording){
            isRecording = false;
            videoCapture.stopRecording();

            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            super.onPause();
        }else
            super.onPause();
    }

请注意，视频录制用例当前标记为隐藏在API中，并且处于非常初步的状态，改变。

编辑：在某些设备上，在设置了videoCapture用例的情况下调用onPause()时，应用仍然崩溃。我添加了CameraX.unbindAll()，以便在调用super.onPause()之前删除所有用例。然后，在onResume()方法中，我再次将它们绑定。

Answer 2

声明一个布尔变量

public class MyClass{
private boolean isSafe;
private boolean isPending
onPause{
isSafe=false;
}
onPostResume{
isSafe=true;
if(isPending)
methodForDoingUrAction();
}
methodForDoingUrAction(){

if(isSAfe){
//do your process
isPending=false;
}
else
isPending=true;
}
}

CameraX-录制视频时在onPause（）上崩溃的应用程序

2 个答案: