Android Camera 2 Api

Question

我一直在尝试camera2 API.我已下载代码

https://developer.android.com/samples/Camera2Video/index.html了解它的工作原理.它工作正常,直到我停止录制.当我停止录制时,它会运行以下代码.

 private void stopRecordingVideo() {
        // UI
        mIsRecordingVideo = false;
        mBtn_Video.setText(R.string.record);
        // Stop recording
        try {
            mMediaRecorder.stop();
            mMediaRecorder.reset();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        Activity activity = getActivity();
        if (null != activity) {
            System.out.println("file " +  getVideoFile(activity));
            Toast.makeText(activity, "Video saved: " + getVideoFile(activity),
                    Toast.LENGTH_SHORT).show();
        }
        startPreview();

在mMediaRecorder.stop(); 它抛出以下错误

01-12 16:24:23.115    2161-2200/com.cameratwoapi E/Surface? queueBuffer: error queuing buffer to SurfaceTexture, -19
01-12 16:24:23.135    2161-2200/com.cameratwoapi E/EGL_emulation? tid 2200: swapBuffers(285): error 0x3003 (EGL_BAD_ALLOC)
01-12 16:24:23.197    2161-2200/com.cameratwoapi E/CameraDeviceGLThread-0? Received exception on GL render thread:
    java.lang.IllegalStateException: swapBuffers: EGL error: 0x3003
            at android.hardware.camera2.legacy.SurfaceTextureRenderer.checkEglError(SurfaceTextureRenderer.java:487)
            at android.hardware.camera2.legacy.SurfaceTextureRenderer.swapBuffers(SurfaceTextureRenderer.java:480)
            at android.hardware.camera2.legacy.SurfaceTextureRenderer.drawIntoSurfaces(SurfaceTextureRenderer.java:681)
            at android.hardware.camera2.legacy.GLThreadManager$1.handleMessage(GLThreadManager.java:103)
            at android.os.Handler.dispatchMessage(Handler.java:98)
            at android.os.Looper.loop(Looper.java:135)
            at android.os.HandlerThread.run(HandlerThread.java:61)

任何想法我做错了什么.我花了几个小时但找不到任何解决方案.

编辑 - 我正在使用geneymotion模拟器.我正在使用的路径

file /storage/emulated/0/Android/data/com.gold.cameratwoapi/files/video.mp4

谢谢

Answer 1

我的解决方案是将void stopRecordingVideo()更改为如下:

private void stopRecordingVideo() {
// UI
mIsRecordingVideo = false;
mButtonVideo.setText(R.string.record);
// Added by Ben Ning, to resolve exception issue when stop recording.
try {
    mPreviewSession.stopRepeating();
    mPreviewSession.abortCaptures();
} catch (CameraAccessException e) {
    e.printStackTrace();
} 

// Stop recording
mMediaRecorder.stop();
mMediaRecorder.reset();

}

关键是:

    try {
    mPreviewSession.stopRepeating();
    mPreviewSession.abortCaptures();
} catch (CameraAccessException e) {
    e.printStackTrace();
} 

Answer 2

        private void stopRecordingVideo() {
// UI
        mIsRecordingVideo = false;
        mButtonVideo.setText(R.string.record);
// Added by Ben Ning, to resolve exception issue when stop recording.
        try {
            mPreviewSession.stopRepeating();
            mPreviewSession.abortCaptures();
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }

// Stop recording
        mMediaRecorder.stop();
        mMediaRecorder.reset();

        Activity activity = getActivity();
        if (null != activity) {
            Toast.makeText(activity, "Video saved: " + getVideoFile(activity),
                    Toast.LENGTH_SHORT).show();
        }
        startPreview();
    }

这为我工作。

Answer 3

调用后mMediaRecorder.stop()总是IllegalStateException会抛出异常。我注意到，在状态更改为错误的设备上INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY，CameraDevice立即onError()调用CameraDevice.StateCallback.

在您引用的示例中，onError()关闭相机并完成活动，因此只需更改onError()为重新打开相机，如下所示：

@Override
public void onError(CameraDevice cameraDevice, int error) {
    // mCameraOpenCloseLock.release();
    // cameraDevice.close();
    // mCameraDevice = null;
    // Activity activity = getActivity();
    // if (null != activity) {
    //  activity.finish();
    // }

    closeCamera();
    openCamera(mTextureView.getWidth(), mTextureView.getHeight());
}

在那里进行一些检查以确保如果确实发生错误，注释掉的代码会被调用，而不是进入一遍又一遍地尝试打开相机的循环，这也是一个好主意。

在配备 Android 5.0.2 的 Moto G 第二代上进行了测试