如何在Android中捕获VideoView的屏幕截图或视频帧
作者:互联网
我从这个博客(http://android-er.blogspot.kr/2013/05/get-current-frame-in-videoview-using.html)尝试了以下教程,该教程展示了如何使用MediaMetadataRetriever从视频源捕获视频帧.但是,它仅在视频位于手机本地时才有效.
有没有办法在VideoView通过IP流式传输视频时捕获视频帧?
解决方法:
我找到了解决这个问题的方法.由于使用SurfaceView时出现低级硬件GPU原因,VideoView似乎不允许这样做.
解决方案是使用TextureView并使用MediaPlayer在其中播放视频. Activity需要实现TextureView.SurfaceTextureListener.使用此解决方案截取屏幕截图时,视频会冻结一段时间.此外,TextureView不会显示播放进度条的默认UI(播放,暂停,FF / RW,播放时间等).这是一个缺点.如果您有其他解决方案,请告诉我:)
这是解决方案:
public class TextureViewActivity extends Activity
implements TextureView.SurfaceTextureListener,
OnBufferingUpdateListener,
OnCompletionListener,
OnPreparedListener,
OnVideoSizeChangedListener
{
private MediaPlayer mp;
private TextureView tv;
public static String MY_VIDEO = "https://www.blahblahblah.com/myVideo.mp4";
public static String TAG = "TextureViewActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_texture_view);
tv = (TextureView) findViewById(R.id.textureView1);
tv.setSurfaceTextureListener(this);
}
public void getBitmap(TextureView vv)
{
String mPath = Environment.getExternalStorageDirectory().toString()
+ "/Pictures/" + Utilities.getDayTimeString() + ".png";
Toast.makeText(getApplicationContext(), "Capturing Screenshot: " + mPath, Toast.LENGTH_SHORT).show();
Bitmap bm = vv.getBitmap();
if(bm == null)
Log.e(TAG,"bitmap is null");
OutputStream fout = null;
File imageFile = new File(mPath);
try {
fout = new FileOutputStream(imageFile);
bm.compress(Bitmap.CompressFormat.PNG, 90, fout);
fout.flush();
fout.close();
} catch (FileNotFoundException e) {
Log.e(TAG, "FileNotFoundException");
e.printStackTrace();
} catch (IOException e) {
Log.e(TAG, "IOException");
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.media_player_video, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)
{
Surface s = new Surface(surface);
try
{
mp = new MediaPlayer();
mp.setDataSource(MY_VIDEO);
mp.setSurface(s);
mp.prepare();
mp.setOnBufferingUpdateListener(this);
mp.setOnCompletionListener(this);
mp.setOnPreparedListener(this);
mp.setOnVideoSizeChangedListener(this);
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp.start();
Button b = (Button) findViewById(R.id.textureViewButton);
b.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v)
{
TextureViewActivity.this.getBitmap(tv);
}
});
}
catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
标签:android-video-player,android,video,android-videoview 来源: https://codeday.me/bug/20191002/1845165.html