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Gọi lại xem trước máy ảnh Android và video ghi âm mediarecorder

2011-07-19 28 views
10

Tôi muốn tạo một ứng dụng, phải quay video (sử dụng bộ ghi phương tiện) và quay video cần định dạng (sử dụng máy ảnh).
Tôi đã tạo mã mẫu được hiển thị bên dưới, nhưng có lỗi hiển thị khi nút bắt đầu nhấn từ trình đơn.chỉ ra lỗi đóng buộc .but previewcallback không có lỗi. Mã của tôi hiển thị dưới đâyGọi lại xem trước máy ảnh Android và video ghi âm mediarecorder

package buffer.video; 
    import android.app.Activity; 
    import android.os.Bundle; 
    import java.io.IOException; 
    import android.app.Activity; 
    import android.hardware.Camera; 
    import android.hardware.Camera.PreviewCallback; 
    import android.media.MediaRecorder; 
    import android.os.Bundle; 
    import android.util.Log; 
    import android.view.Menu; 
    import android.view.MenuInflater; 
    import android.view.MenuItem; 
    import android.view.SurfaceHolder; 
    import android.view.SurfaceView; 
    import android.widget.Toast; 

    public class VofoVideoToBufferActivity extends Activity implements SurfaceHolder.Callback, 
    Camera.AutoFocusCallback { 

    private SurfaceView preview; 
    private SurfaceHolder previewHolder; 

    private MediaRecorder mRecorder; 
    private Camera mCamera; 
    private boolean mPreviewRunning = false; 
    private boolean mCaptureFrame = false; 


    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    Log.e("", "Begin onCreate"); 
    setContentView(R.layout.main); 

    preview = (SurfaceView) findViewById(R.id.surfaceView1); 
    previewHolder = preview.getHolder(); 
    previewHolder.addCallback(this); 
    previewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 


    } 


    public void onResume() { 
    super.onResume(); 
    } 


    public void onPause() { 
    super.onPause(); 
    } 


    public boolean onCreateOptionsMenu(Menu menu) { 
    MenuInflater inflater = getMenuInflater(); 
    inflater.inflate(R.menu.menu, menu); 
    return true; 
    } 

    public void startRecording() { 
    Log.e("", "Begin StartRecording"); 
    mCaptureFrame = true; 

    if(mRecorder!=null) 
    { 
     mRecorder.stop(); 
     mRecorder.release(); 
    } 
    mRecorder = new MediaRecorder(); 
    mRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); 
    mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
    mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
    mRecorder.setVideoSize(176, 144); 
    mRecorder.setVideoFrameRate(15); 
    mRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263); 
    mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 


    mRecorder.setMaxDuration(30000); 

    mRecorder.setPreviewDisplay(previewHolder.getSurface()); 
    mRecorder.setOutputFile("/sdcard/videotest2.3gp"); 
    try { 
     mRecorder.prepare(); 
    } catch (IllegalStateException e) { 
     e.printStackTrace(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 
    mRecorder.start(); 
    } 

    public void stopRecording() { 
    Log.e("", "Begin StopChange"); 
    mRecorder.stop(); 
    } 


    public boolean onOptionsItemSelected(MenuItem item) { 

    switch (item.getItemId()) { 
    case R.id.startRecording: 
     startRecording(); 

     return true; 
    case R.id.stopRecording: 
     stopRecording(); 
     return true; 
    default: 
     return super.onOptionsItemSelected(item); 
    } 
    } 


    public void surfaceCreated(SurfaceHolder holder) { 
    Log.e("", "Begin surfaceDestroy"); 
    mCamera = Camera.open(); 
    } 


    public void surfaceDestroyed(SurfaceHolder holder) { 
    mCamera.stopPreview(); 
    mPreviewRunning = false; 
    mCamera.release(); 

    mRecorder.reset(); 
    mRecorder.release(); 
    } 


    public void onAutoFocus(boolean success, Camera camera) { 


    } 


    PreviewCallback previewCallback = new PreviewCallback() { 
    public void onPreviewFrame(byte[] data, Camera camera) { 
     Log.e("", "onPreviewFrame pass"); 
     if (mCaptureFrame) { 
     Toast.makeText(getParent(),"halooo",Toast.LENGTH_LONG).show(); 

     } 
    } 
    }; 


    public void surfaceChanged(SurfaceHolder holder, int format, int width, 
     int height) { 
    Log.e("", "Begin SurfaceChange"); 



    if (mPreviewRunning) 
     mCamera.stopPreview(); 

    Camera.Parameters p = mCamera.getParameters(); 
    p.setPreviewSize(170,240); 

    mCamera.setParameters(p); 

    try { 
     mCamera.setPreviewDisplay(holder); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 

    mCamera.setPreviewCallback(previewCallback); 

    mCamera.startPreview(); 
    mPreviewRunning = true; 

    } 

    }

Manifestfile chương trình dưới đây

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
     package="vofo.streaming" 
     android:versionCode="1" 
     android:versionName="1.0"> 
    <uses-sdk android:minSdkVersion="8" /> 
    <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission> 
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission> 
    <uses-permission android:name="android.permission.CAMERA"></uses-permission> 
    <uses-permission android:name="android.permission.INTERNET"></uses-permission> 

    <application android:icon="@drawable/icon" android:label="@string/app_name"> 
     <activity android:name=".MainActivity" 
        android:label="@string/app_name"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 

    </application> 
</manifest>

xem Logcat hiện below.Logcat phần cuối cùng chỉ sao chép.

07-19 12:42:42.229: DEBUG/dalvikvm(8599): GC_FOR_MALLOC freed 7 objects/408168 bytes in 236ms 
07-19 12:42:42.259: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:42.339: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:42.469: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:42.589: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:42.709: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:43.089: DEBUG/dalvikvm(8599): GC_FOR_MALLOC freed 7 objects/408168 bytes in 258ms 
07-19 12:42:43.099: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:43.169: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:43.289: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:43.419: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:43.439: INFO/ActivityManager(67): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=vofo.streaming/.MainActivity } 
07-19 12:42:43.629: DEBUG/AndroidRuntime(8802): Shutting down VM 
07-19 12:42:43.679: DEBUG/dalvikvm(8802): Debugger has detached; object registry had 1 entries 
07-19 12:42:43.809: INFO/AndroidRuntime(8802): NOTE: attach of thread 'Binder Thread #3' failed 
07-19 12:42:43.841: INFO/ActivityManager(67): Start proc vofo.streaming for activity vofo.streaming/.MainActivity: pid=8811 uid=10036 gids={1015, 1006, 3003} 
07-19 12:42:43.850: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:44.479: DEBUG/dalvikvm(8599): GC_FOR_MALLOC freed 15 objects/408680 bytes in 566ms 
07-19 12:42:44.499: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:44.589: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:44.719: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:44.859: ERROR/(8599): onPreviewFrame pass 
07-19 12:42:45.859: VERBOSE/RecordVideo(8811): Width x Height = 176x144 
07-19 12:42:45.949: INFO/ActivityManager(67): Displayed activity vofo.streaming/.MainActivity: 2317 ms (total 2317 ms) 
07-19 12:42:46.599: DEBUG/AndroidRuntime(8599): Shutting down VM 
07-19 12:42:46.599: WARN/dalvikvm(8599): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599): FATAL EXCEPTION: main 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599): java.lang.NullPointerException 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at buffer.video.VofoVideoToBufferActivity.surfaceDestroyed(VofoVideoToBufferActivity.java:128) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at android.view.SurfaceView.reportSurfaceDestroyed(SurfaceView.java:568) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at android.view.SurfaceView.updateWindow(SurfaceView.java:472) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at android.view.SurfaceView.onWindowVisibilityChanged(SurfaceView.java:206) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at android.view.View.dispatchWindowVisibilityChanged(View.java:3891) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:719) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:719) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:719) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:719) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at android.view.ViewRoot.performTraversals(ViewRoot.java:744) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1727) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at android.os.Handler.dispatchMessage(Handler.java:99) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at android.os.Looper.loop(Looper.java:123) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at java.lang.reflect.Method.invoke(Method.java:521) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
07-19 12:42:46.669: ERROR/AndroidRuntime(8599):  at dalvik.system.NativeStart.main(Native Method) 
07-19 12:42:48.049: DEBUG/dalvikvm(181): GC_EXPLICIT freed 191 objects/13008 bytes in 8398ms 
07-19 12:42:52.690: INFO/Process(8599): Sending signal. PID: 8599 SIG: 9 
07-19 12:42:52.750: INFO/ActivityManager(67): Process buffer.video (pid 8599) has died. 
07-19 12:42:52.759: INFO/WindowManager(67): WIN DEATH: Window{4509e720 SurfaceView paused=false} 
07-19 12:42:52.790: INFO/WindowManager(67): WIN DEATH: Window{4507e048 buffer.video/buffer.video.VofoVideoToBufferActivity paused=false} 
07-19 12:42:52.880: WARN/InputManagerService(67): Window already focused, ignoring focus gain of: [email protected] 
07-19 12:42:56.730: DEBUG/dalvikvm(262): GC_EXPLICIT freed 31 objects/1576 bytes in 169ms 
07-19 12:43:00.439: ERROR/CameraInput(34): Unsupported parameter(x-pvmf/media-input-node/cap-config-interface;valtype=key_specific_value) 
07-19 12:43:00.439: ERROR/CameraInput(34): VerifiyAndSetParameter failed on parameter #0 
07-19 12:43:00.460: ERROR/audio_input(34): unsupported parameter: x-pvmf/media-input-node/cap-config-interface;valtype=key_specific_value 
07-19 12:43:00.469: ERROR/audio_input(34): VerifyAndSetParameter failed 
07-19 12:43:00.539: WARN/AuthorDriver(34): Video encoding bit rate is set to 192000 bps 
07-19 12:43:00.589: INFO/MediaRecorderJNI(8811): prepare: surface=0x20fc70 (id=1) 
07-19 12:43:00.649: ERROR/PVOMXEncNode(34): PVMFOMXEncNode-Audio_AMRNB::DoPrepare(): Got Component OMX.PV.amrencnb handle 
07-19 12:43:00.699: DEBUG/CameraHardwareStub(34): initHeapLocked: preview size=320x240 
07-19 12:43:00.759: DEBUG/CameraInput(34): Intended mFrameWidth=176, mFrameHeight=144 
07-19 12:43:00.759: DEBUG/CameraHardwareStub(34): initHeapLocked: preview size=176x144 
07-19 12:43:00.779: DEBUG/CameraInput(34): Actual mFrameWidth=176, mFrameHeight=144 
07-19 12:43:00.799: ERROR/AuthorDriver(34): Command 13 completed with error -17 
07-19 12:43:00.799: ERROR/MediaRecorder(8811): prepare failed: -17 
07-19 12:43:00.799: ERROR/RecordVideo(8811): java.io.IOException: prepare failed. 
07-19 12:43:00.799: WARN/System.err(8811): java.io.IOException: prepare failed. 
07-19 12:43:00.850: WARN/System.err(8811):  at android.media.MediaRecorder._prepare(Native Method) 
07-19 12:43:00.859: WARN/System.err(8811):  at android.media.MediaRecorder.prepare(MediaRecorder.java:503) 
07-19 12:43:00.869: WARN/System.err(8811):  at vofo.streaming.MainActivity.beginRecording(MainActivity.java:191) 
07-19 12:43:00.869: WARN/System.err(8811):  at vofo.streaming.MainActivity.access$0(MainActivity.java:162) 
07-19 12:43:00.899: WARN/System.err(8811):  at vofo.streaming.MainActivity$1.onClick(MainActivity.java:74) 
07-19 12:43:00.899: WARN/System.err(8811):  at android.view.View.performClick(View.java:2408) 
07-19 12:43:00.899: WARN/System.err(8811):  at android.view.View$PerformClick.run(View.java:8816) 
07-19 12:43:00.899: WARN/System.err(8811):  at android.os.Handler.handleCallback(Handler.java:587) 
07-19 12:43:00.919: WARN/System.err(8811):  at android.os.Handler.dispatchMessage(Handler.java:92) 
07-19 12:43:00.919: WARN/System.err(8811):  at android.os.Looper.loop(Looper.java:123) 
07-19 12:43:00.959: WARN/System.err(8811):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
07-19 12:43:00.959: WARN/System.err(8811):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-19 12:43:00.969: WARN/System.err(8811):  at java.lang.reflect.Method.invoke(Method.java:521) 
07-19 12:43:00.969: WARN/System.err(8811):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
07-19 12:43:00.969: WARN/System.err(8811):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
07-19 12:43:00.989: WARN/System.err(8811):  at dalvik.system.NativeStart.main(Native Method)

Xin hãy giúp tôi

Nguồn

2011-07-19 nikhilkilivayil

+0

đặt chi tiết logcat của bạn ở đây –

+0

logcat tôi sao chép. – nikhilkilivayil

Trả lời

0

Hoặc mCamera hoặc mRecorder là null trong phương pháp của bạn onSurfaceDestroyed. Kiểm tra null và chỉ thực hiện thao tác trên các đối tượng này nếu nó không phải là null.

Nguồn

2011-07-20 06:43:07 bluefalcon

+0

cảm ơn sự giúp đỡ của bạn. Nhưng lỗi của tôi không nhận được sau khi onSurFaceDestroyed. Lỗi chỉ nhận được khi phương thức startRecording() sẽ gọi. – nikhilkilivayil

+0

nhưng nhật ký logcat của bạn ' 07-19 12: 42: 46.669: ERROR/AndroidRuntime (8599): tại buffer.video.VofoVideoToBufferActivity.surfaceDestroyed (VofoVideoToBufferActivity.java:128) 'nói cách khác .. – bluefalcon

0

Remove dòng sau:

mRecorder.setVideoSize(176, 144);

Nguồn

2013-10-17 13:15:47 ramkumar5035

0

Bạn nên gọi mRecorder.setPreviewDisplay (previewHolder.getSurface()); sau khi bề mặt được tạo. bề mặt khoảng trống công cộngĐược xử lý (chủ SurfaceHolder) { Log.e ("", "Begin surfaceDestroy"); mCamera = Camera.open(); mRecorder.setPreviewDisplay (previewHolder.getSurface()); }

Nguồn

2015-05-06 09:55:01

0

Giải pháp một: Bạn có thể thay đổi phương thức startrecording() để:

private void startrecording(){ 

    mCamera = getCameraInstance(); 
    mMediaRecorder = new MediaRecorder(); 

    // Step 1: Unlock and set camera to MediaRecorder 
    mCamera.unlock(); 
    mMediaRecorder.setCamera(mCamera); 

    // Step 2: Set sources 
    mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER); 
    mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); 

    // Step 3: Set a CamcorderProfile (requires API Level 8 or higher) 
    mMediaRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH)); 

    // Step 4: Set output file 
    mMediaRecorder.setOutputFile(getOutputMediaFile(MEDIA_TYPE_VIDEO).toString()); 

    // Step 5: Set the preview output 
    mMediaRecorder.setPreviewDisplay(mPreview.getHolder().getSurface()); 

    // Step 6: Prepare configured MediaRecorder 
    try { 
     mMediaRecorder.prepare(); 
    } catch (IllegalStateException e) { 
     Log.d(TAG, "IllegalStateException preparing MediaRecorder: " + e.getMessage()); 
     releaseMediaRecorder(); 
     return false; 
    } catch (IOException e) { 
     Log.d(TAG, "IOException preparing MediaRecorder: " + e.getMessage()); 
     releaseMediaRecorder(); 

    } 
    mMediaRecorder.start(); 
}

Nguồn

2015-12-09 14:03:12 shayan

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