Rk3288 android USB双摄像头录制视频

Rk3288板子插2个摄像头，其中一个做监控用，需要录制视频，代码如下

public class Recorder {private String TAG = Recorder.class.getSimpleName();private static final int MEDIA_RECORDER_REQUEST = 0;private Camera mCamera;private TextureView mPreview;private MediaRecorder mMediaRecorder;private File mOutputFile;private boolean isRecording = false;int frontCamera = 1;private int previewWidth = 320;private int previewHeight = 240;int defaultVideoFrameRate = -1;private final String[] requiredPermissions = {Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.RECORD_AUDIO,Manifest.permission.CAMERA,};public Recorder(TextureView mPreview) {this.mPreview = mPreview;}public void startCapture(String rid) {dLog.e(TAG, "开始录制视频rid=" + rid);if (isRecording) {// BEGIN_INCLUDE(stop_release_media_recorder)// stop recording and release cameratry {mMediaRecorder.stop();  // stop the recording} catch (RuntimeException e) {// RuntimeException is thrown when stop() is called immediately after start().// In this case the output file is not properly constructed ans should be deleted.Log.d(TAG, "RuntimeException: stop() is called immediately after start()");//noinspection ResultOfMethodCallIgnoredmOutputFile.delete();}releaseMediaRecorder(); // release the MediaRecorder objectmCamera.lock();         // take camera access back from MediaRecorder// inform the user that recording has stoppedisRecording = false;releaseCamera();// END_INCLUDE(stop_release_media_recorder)};new MediaPrepareTask(rid).execute(null, null, null);}public void stopCapture() {dLog.e(TAG, "结束录制视频");if (isRecording) {// BEGIN_INCLUDE(stop_release_media_recorder)// stop recording and release cameratry {mMediaRecorder.stop();  // stop the recording} catch (RuntimeException e) {// RuntimeException is thrown when stop() is called immediately after start().// In this case the output file is not properly constructed ans should be deleted.Log.e(TAG, "RuntimeException: stop() is called immediately after start()");//noinspection ResultOfMethodCallIgnoredmOutputFile.delete();}releaseMediaRecorder(); // release the MediaRecorder objectmCamera.lock();         // take camera access back from MediaRecorder// inform the user that recording has stoppedisRecording = false;releaseCamera();// END_INCLUDE(stop_release_media_recorder)new Thread(new Runnable() {@Overridepublic void run() {clearFile();}}).start();}}private void clearFile() {Long dirLgngth = FileUtils.getDirLength(UploadVideoUtils.FolderPath);if (dirLgngth / 1048576 > 20) {deleteAnyVideo(FileUtils.getFileByPath(UploadVideoUtils.FolderPath));}}public static long deleteAnyVideo(final File dir) {if (!FileUtils.isDir(dir)) return -1;long len = 0;File[] files = dir.listFiles();if (files != null && files.length != 0) {for (int i = 0; i < files.length / 3; i++) {FileUtils.delete(files[i]);}}return len;}protected void onPause() {// if we are using MediaRecorder, release it firstreleaseMediaRecorder();// release the camera immediately on pause eventreleaseCamera();}private void releaseMediaRecorder() {if (mMediaRecorder != null) {// clear recorder configurationmMediaRecorder.reset();// release the recorder objectmMediaRecorder.release();mMediaRecorder = null;// Lock camera for later use i.e taking it back from MediaRecorder.// MediaRecorder doesn't need it anymore and we will release it if the activity pauses.mCamera.lock();}}private void releaseCamera() {if (mCamera != null) {mCamera.release();mCamera = null;}}@SuppressLint("NewApi")private boolean initCamera() {try {if (frontCamera == 0) {mCamera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);} else {mCamera = Camera.open(Camera.CameraInfo.CAMERA_FACING_FRONT);}Camera.Parameters camParams = mCamera.getParameters();mCamera.lock();try {mCamera.setPreviewTexture(mPreview.getSurfaceTexture());//注意处,如果没有设置preview,录像会报错.坑1} catch (IOException e) {e.printStackTrace();dLog.e(TAG, e.getMessage());}mCamera.setDisplayOrientation(90);} catch (RuntimeException ex) {dLog.e(TAG, ex.getMessage());return false;}return true;}void initCameraParameter(){boolean hasSupportRate = false;Camera.Parameters parameters = mCamera.getParameters();List<Integer> supportedPreviewFrameRates = parameters.getSupportedPreviewFrameRates();if (supportedPreviewFrameRates != null&& supportedPreviewFrameRates.size() > 0) {Collections.sort(supportedPreviewFrameRates);for (int i = 0; i < supportedPreviewFrameRates.size(); i++) {int supportRate = supportedPreviewFrameRates.get(i);if (supportRate == 15) {hasSupportRate = true;}}if (hasSupportRate) {defaultVideoFrameRate = 15;} else {defaultVideoFrameRate = supportedPreviewFrameRates.get(0);}}// 获取摄像头的所有支持的分辨率List<Camera.Size> resolutionList = parameters.getSupportedVideoSizes();if (resolutionList != null && resolutionList.size() > 0) {
//            Collections.sort(resolutionList, new Utils.ResolutionComparator());Camera.Size previewSize = null;boolean hasSize = false;// 如果摄像头支持640*480，那么强制设为640*480for (int i = 0; i < resolutionList.size(); i++) {Camera.Size size = resolutionList.get(i);if (size != null && size.width == 320 && size.height == 240) {previewSize = size;previewWidth = previewSize.width;previewHeight = previewSize.height;hasSize = true;break;}}// 如果不支持设为中间的那个if (!hasSize) {int mediumResolution = resolutionList.size() / 2;if (mediumResolution >= resolutionList.size())mediumResolution = resolutionList.size() - 1;previewSize = resolutionList.get(mediumResolution);previewWidth = previewSize.width;previewHeight = previewSize.height;}}}private boolean prepareVideoRecorder(String rid) {try {initCamera();initCameraParameter();mMediaRecorder = new MediaRecorder();mCamera.unlock();mMediaRecorder.setCamera(mCamera);// 设置录制视频源为Camera（相机）mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);if (frontCamera == 1) {mMediaRecorder.setOrientationHint(270);} else {mMediaRecorder.setOrientationHint(90);}// 设置录制完成后视频的封装格式THREE_GPP为3gp.MPEG_4为mp4mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);// 设置录制的视频编码h263 h264mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);// 设置视频录制的分辨率。必须放在设置编码和格式的后面，否则报错mMediaRecorder.setVideoSize(previewWidth, previewHeight);// 设置视频的比特率mMediaRecorder.setVideoEncodingBitRate(384 * 1024);// // 设置录制的视频帧率。必须放在设置编码和格式的后面，否则报错if (defaultVideoFrameRate != -1) {//mMediaRecorder.setVideoFrameRate(defaultVideoFrameRate);}mOutputFile = CameraHelper.getOutputMediaFile(CameraHelper.MEDIA_TYPE_VIDEO, rid);dLog.e(TAG, "录制视频地址=" + mOutputFile.getAbsolutePath());if (mOutputFile == null) {return false;}mMediaRecorder.setOutputFile(mOutputFile.getPath());mMediaRecorder.setMaxFileSize(1024 * 1024 * 200);try {mMediaRecorder.prepare();} catch (IllegalStateException e) {dLog.e(TAG, "IllegalStateException preparing MediaRecorder: ${e.message}");releaseMediaRecorder();return false;} catch (IOException e) {releaseMediaRecorder();return false;}return true;} catch (Exception e) {Log.e("recorderError", e.getMessage());releaseMediaRecorder();return false;}}class MediaPrepareTask extends AsyncTask<Void, Void, Boolean> {private String rid;public MediaPrepareTask(String rid) {this.rid = rid;}@Overrideprotected Boolean doInBackground(Void... Void) {// initialize video cameraif (prepareVideoRecorder(rid)) {// Camera is available and unlocked, MediaRecorder is prepared,// now you can start recordingtry {mMediaRecorder.start();isRecording = true;} catch (IllegalStateException e) {isRecording = false;releaseMediaRecorder();Log.e(TAG, "mMediaRecorder start Error" + e.getMessage());return false;} catch (Exception e) {isRecording = false;releaseMediaRecorder();Log.e(TAG, "mMediaRecorder start Error" + e.getMessage());}} else {// prepare didn't work, release the camerareleaseMediaRecorder();return false;}return true;}@Overrideprotected void onPostExecute(Boolean result) {if (!result) {
//                Recorder.this.finish();}}}}

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Rk3288 android USB双摄像头录制视频

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