Androidカメラのプレビューコールバックとメディアレコーダーの録画ビデオ

ビデオを録画する（メディアレコーダーを使用）と録画したビデオをフォーマットする（カメラを使用する）必要があるアプリケーションを作成したいと考えています。
以下に示すサンプルコードを作成しましたが、startrecordingボタンが押されたときにエラーが表示されます。強制終了エラーを表示しますが、previewcallbackにはエラーはありません。私のコードは、最後の部分のみをコピーbelow.Logcat示すAndroidカメラのプレビューコールバックとメディアレコーダーの録画ビデオ

<?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>

Logcatビューの下

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ショーの下に示します。

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)

出典

2011-07-19 nikhilkilivayil

ここ –

私のlogcatをコピーし、あなたのlogcatの詳細を置きます。 – nikhilkilivayil

mCameraまたはmRecorderどちらかがあなたの方法onSurfaceDestroyedでnullである私を助けてください。 nullをチェックし、これらのオブジェクトがnullでない場合にのみ操作を実行します。

出典

2011-07-20 06:43:07 bluefalcon

あなたの助けてくれてありがとう。しかし、私のエラーはonSurFaceDestroyedの後には得られません。エラーは、startRecording（）メソッドが呼び出すときにのみ取得されます。 – nikhilkilivayil

logcatログ ' 07-19 12:42:46.669：ERROR/AndroidRuntime（8599）：buffer.video.VideoToBufferActivity.surfaceDestroyed（VofoVideoToBufferActivity.java:128） 'と表示されます。 – bluefalcon

削除するには、次の行：

mRecorder.setVideoSize(176, 144);

出典

2013-10-17 13:15:47 ramkumar5035

あなたが呼び出す必要があり mRecorder.setPreviewDisplay（previewHolder.getSurface（））;表面が作成された後に public void surfaceCreated（SurfaceHolder holder）{ Log.e（ ""、 "Begin surfaceDestroy"）; mCamera = Camera.open（）; mRecorder.setPreviewDisplay（previewHolder.getSurface（））; }

出典

2015-05-06 09:55:01

溶液A：あなたがに）（メソッドのstartrecordingを変更することができます。

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(); 
}

出典

2015-12-09 14:03:12 shayan

Androidカメラのプレビューコールバックとメディアレコーダーの録画ビデオ

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