【发布时间】：2010-07-19 13:40:34
【问题描述】：
我需要在同一个文件中同时录制 3gp/mp4 格式的音频和视频文件。
当我运行时，我的应用程序文件是用videofile.3gp 创建的，但视频没有录制到模拟器上的 SD 卡中。模拟器上能录视频吗？如果我在支持 android 的设备上运行此代码，我会看到这些错误吗？
以下代码和错误：
package com.video;
/*
*
* @copy Rights
* audio.java
* sample code for Eminosoft Developerworks Article
* Android developent Team
* www.eminosoft.cm
*
*/
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.provider.Settings;
import android.util.Log;
import android.view.View;
import android.widget.Button;
public class video extends Activity {
public MediaRecorder mrec = null;
private Button startRecording = null;
private Button stopRecording = null;
private static final String TAG = "SoundRecordingDemo";
File audiofile;
File video;
private MediaPlayer mMediaPlayer;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mrec = new MediaRecorder();
mMediaPlayer = new MediaPlayer();
Log.i(TAG , "Video starting");
startRecording = (Button)findViewById(R.id.startrecording);
stopRecording = (Button)findViewById(R.id.stoprecording);
startRecording.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
try
{
mMediaPlayer=new MediaPlayer();
Context appContext = getApplicationContext();
startRecording.setEnabled(false);
stopRecording.setEnabled(true);
stopRecording.requestFocus();
startRecording();
}catch (Exception ee)
{
Log.e(TAG,"Caught io exception " + ee.getMessage());
}
}
});
stopRecording.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
startRecording.setEnabled(true);
stopRecording.setEnabled(false);
startRecording.requestFocus();
stopRecording();
processaudiofile();
}
});
stopRecording.setEnabled(false);
startRecording.setEnabled(true);
}
protected void processaudiofile() {
ContentValues values = new ContentValues(4);
long current = System.currentTimeMillis();
values.put(MediaStore.Video.Media.TITLE, "video"+video.getName());
values.put(MediaStore.Video.Media.DATE_ADDED, (int)(current/1000));
values.put(MediaStore.Video.Media.MIME_TYPE, "video/3gpp");
values.put(MediaStore.Video.Media.DATA, video.getAbsolutePath());
ContentResolver contentResolver = getContentResolver();
Uri base=MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
Uri newUri = contentResolver.insert(base, values);
// this does not always seem to work cleanly....
//sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,newUri ));
}
protected void startRecording() throws IOException
{
// Configure the input sources
mrec.setAudioSource(MediaRecorder.AudioSource.MIC);
mrec.setVideoSource(MediaRecorder.VideoSource.CAMERA);
// Set the output format
mrec.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mrec.setVideoFrameRate(15);
// Specify the audio and video encoding
mrec.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mrec.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
//mrec.setMaxDuration(20000); // length of video in MS
//mrec.setVideoSize(320, 240);
// Specify the output file
//mrec.setOutputFile("/sdcard/myoutputfile.mp4");
// Prepare to record
//mrec.prepare();
//mrec.start();
//mrec.setOutputFile(video.getPath());
//mrec.setOutputFile(/sdcard/yousuck2.3gp);
// mRecorder.setOutputFile("/sdcard/yousuck2.3gp");
if (video == null) {
File sampleDir = Environment.getExternalStorageDirectory();
try {
video = File.createTempFile("videofile", ".3gp", sampleDir);
}
catch (IOException e)
{
Log.e(TAG,"sdcard access error");
return;
}
}
mrec.setOutputFile(video.getAbsolutePath());
mrec.prepare();
mrec.start();
}
protected void stopRecording() {
mrec.stop();
mrec.release();
}
}
我收到以下错误。
ERROR/AndroidRuntime(16055): ERROR: thread attach failed
ERROR/audio_input(31): unsupported parameter: x-pvmf/media-input-node/cap-config-interface;valtype=key_specific_value
ERROR/audio_input(31): VerifyAndSetParameter failed
ERROR/CameraInput(31): Unsupported parameter(x-pvmf/media-input-node/cap-config-interface;valtype=key_specific_value)
ERROR/CameraInput(31): VerifiyAndSetParameter failed on parameter #0
ERROR/PVOMXEncNode(31): PVMFOMXEncNode-Audio_AMRNB::DoPrepare(): Got Component OMX.PV.amrencnb handle
ERROR/PVOMXEncNode(31): PVMFOMXEncNode-Video_AVC::DoPrepare(): Cannot get component OMX.PV.avcenc handle, try another component if available
ERROR/MediaPlayerService(31): error: -2
ERROR/MediaPlayer(31): Unable to to create media player
ERROR/CameraService(31): Failed to load CameraService sounds.
ERROR/MediaPlayerService(31): error: -2
ERROR/MediaPlayer(31): Unable to to create media player
ERROR/CameraService(31): Failed to load CameraService sounds.
ERROR/CameraInput(31): No surface is available for display.
ERROR/AuthorDriver(31): Command 13 completed with error -1
ERROR/SoundRecordingDemo(15961): Caught io exception prepare failed.
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标签： android video-capture audio-recording