android视频旋转处理方法

这几天在写视频播放器，采用surfaceview搭配mediaplayer或者VideoView进行视频播放，一切都还顺风顺水，当我播放一个方向不对的视频的时候没能自动转换成正确的方向。这时只能靠自己，将视频方向旋转90度。有想法就要开始动手了，可是不论怎么旋转，其他东西都旋转了，可是视频还是纹丝不动，百度了很久没有结果，stack overflow几分钟看不懂英文没办法，可是看到了TextureView这个类，拿来已用，进行旋转是多么的方便多么的快乐啊，终于能够正常的播放了，太开心了。

/** Copyright (C) 2013 yixia.com** Licensed under the Apache License, Version 2.0 (the "License");* you may not use this file except in compliance with the License.* You may obtain a copy of the License at**      http://www.apache.org/licenses/LICENSE-2.0** Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/package io.vov.vitamio.demo;import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Matrix;
import android.graphics.SurfaceTexture;
import android.media.AudioManager;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.Surface;
import android.view.TextureView;
import android.widget.Toast;
import io.vov.vitamio.LibsChecker;
import io.vov.vitamio.MediaPlayer;
import io.vov.vitamio.MediaPlayer.OnBufferingUpdateListener;
import io.vov.vitamio.MediaPlayer.OnCompletionListener;
import io.vov.vitamio.MediaPlayer.OnPreparedListener;@SuppressLint("NewApi")
public class MediaPlayerDemo_setSurface extends Activity implements OnBufferingUpdateListener,OnCompletionListener, OnPreparedListener, TextureView.SurfaceTextureListener {private static final String TAG = "MediaPlayerDemo";private int mVideoWidth;private int mVideoHeight;private MediaPlayer mMediaPlayer;private TextureView mTextureView;private String path;private Surface surf;private boolean mIsVideoSizeKnown = false;private boolean mIsVideoReadyToBePlayed = false;/*** * Called when the activity is first created.*/@Overridepublic void onCreate(Bundle icicle) {super.onCreate(icicle);if (!LibsChecker.checkVitamioLibs(this))return;setContentView(R.layout.mediaplayer_3);mTextureView = (TextureView) findViewById(R.id.surface);mTextureView.setSurfaceTextureListener(this);mTextureView.setRotation(90);}@SuppressLint("NewApi")private void playVideo(SurfaceTexture surfaceTexture) {doCleanUp();try {path = Environment.getExternalStorageDirectory()+"/"+"1.mp4";if (path == "") {// Tell the user to provide a media file URL.Toast.makeText(MediaPlayerDemo_setSurface.this,"Please edit MediaPlayerDemo_setSurface Activity, "+ "and set the path variable to your media file path."+ " Your media file must be stored on sdcard.", Toast.LENGTH_LONG).show();return;}// Create a new media player and set the listenersmMediaPlayer = new MediaPlayer(this, true);mMediaPlayer.setDataSource(path);if (surf == null) {surf = new Surface (surfaceTexture);}mMediaPlayer.setSurface(surf);mMediaPlayer.prepareAsync();mMediaPlayer.setOnBufferingUpdateListener(this);mMediaPlayer.setOnCompletionListener(this);mMediaPlayer.setOnPreparedListener(this);setVolumeControlStream(AudioManager.STREAM_MUSIC);} catch (Exception e) {Log.e(TAG, "error: " + e.getMessage(), e);}}public void onBufferingUpdate(MediaPlayer arg0, int percent) {// Log.d(TAG, "onBufferingUpdate percent:" + percent);}public void onCompletion(MediaPlayer arg0) {Log.d(TAG, "onCompletion called");}public void onPrepared(MediaPlayer mediaplayer) {Log.d(TAG, "onPrepared called");mIsVideoReadyToBePlayed = true;if (mIsVideoReadyToBePlayed) {startVideoPlayback();}}@Overrideprotected void onPause() {super.onPause();releaseMediaPlayer();doCleanUp();}@Overrideprotected void onDestroy() {super.onDestroy();releaseMediaPlayer();doCleanUp();}private void releaseMediaPlayer() {if (mMediaPlayer != null) {mMediaPlayer.release();mMediaPlayer = null;}}private void doCleanUp() {mVideoWidth = 0;mVideoHeight = 0;mIsVideoReadyToBePlayed = false;mIsVideoSizeKnown = false;}private void startVideoPlayback() {Log.v(TAG, "startVideoPlayback");adjustAspectRatio(mMediaPlayer.getVideoWidth(), mMediaPlayer.getVideoHeight());mMediaPlayer.start();}/*** Sets the TextureView transform to preserve the aspect ratio of the video.*/private void adjustAspectRatio(int videoWidth, int videoHeight) {int viewWidth = mTextureView.getWidth();int viewHeight = mTextureView.getHeight();double aspectRatio = (double) videoHeight / videoWidth;int newWidth, newHeight;if (viewHeight > (int) (viewWidth * aspectRatio)) {// limited by narrow width; restrict heightnewWidth = viewWidth;newHeight = (int) (viewWidth * aspectRatio);} else {// limited by short height; restrict widthnewWidth = (int) (viewHeight / aspectRatio);newHeight = viewHeight;}int xoff = (viewWidth - newWidth) / 2;int yoff = (viewHeight - newHeight) / 2;Log.v(TAG, "video=" + videoWidth + "x" + videoHeight + " view=" + viewWidth + "x" + viewHeight+ " newView=" + newWidth + "x" + newHeight + " off=" + xoff + "," + yoff);Matrix txform = new Matrix();mTextureView.getTransform(txform);txform.setScale((float) newWidth / viewWidth, (float) newHeight / viewHeight);//txform.postRotate(10);          // just for funtxform.postTranslate(xoff, yoff);mTextureView.setTransform(txform);}@Overridepublic void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {playVideo(surface);}@Overridepublic void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {}@Overridepublic boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {return false;}@Overridepublic void onSurfaceTextureUpdated(SurfaceTexture surface) {}}

TextureView类的介绍。http://www.bubuko.com/infodetail-656030.html

更新后的代码

/** Copyright (C) 2013 yixia.com** Licensed under the Apache License, Version 2.0 (the "License");* you may not use this file except in compliance with the License.* You may obtain a copy of the License at**      http://www.apache.org/licenses/LICENSE-2.0** Unless required by applicable law or agreed to in writing, software* distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.* See the License for the specific language governing permissions and* limitations under the License.*/package io.vov.vitamio.demo;import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Matrix;
import android.graphics.SurfaceTexture;
import android.media.AudioManager;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.Surface;
import android.view.TextureView;
import android.widget.Toast;
import io.vov.vitamio.LibsChecker;
import io.vov.vitamio.MediaPlayer;
import io.vov.vitamio.MediaPlayer.OnBufferingUpdateListener;
import io.vov.vitamio.MediaPlayer.OnCompletionListener;
import io.vov.vitamio.MediaPlayer.OnPreparedListener;@SuppressLint("NewApi")
public class MediaPlayerDemo_setSurface extends Activity implements OnBufferingUpdateListener,OnCompletionListener, OnPreparedListener, TextureView.SurfaceTextureListener {private static final String TAG = "MediaPlayerDemo";private int mVideoWidth;private int mVideoHeight;private MediaPlayer mMediaPlayer;private TextureView mTextureView;private String path;private Surface surf;private boolean mIsVideoSizeKnown = false;private boolean mIsVideoReadyToBePlayed = false;/*** * Called when the activity is first created.*/@Overridepublic void onCreate(Bundle icicle) {super.onCreate(icicle);if (!LibsChecker.checkVitamioLibs(this))return;setContentView(R.layout.mediaplayer_3);mTextureView = (TextureView) findViewById(R.id.surface);mTextureView.setSurfaceTextureListener(this);mTextureView.setRotation(90);mTextureView.setScaleX(1280f/720);mTextureView.setScaleY(720f/1280);}@SuppressLint("NewApi")private void playVideo(SurfaceTexture surfaceTexture) {doCleanUp();try {path = Environment.getExternalStorageDirectory()+"/"+"1.mp4";if (path == "") {// Tell the user to provide a media file URL.Toast.makeText(MediaPlayerDemo_setSurface.this,"Please edit MediaPlayerDemo_setSurface Activity, "+ "and set the path variable to your media file path."+ " Your media file must be stored on sdcard.", Toast.LENGTH_LONG).show();return;}// Create a new media player and set the listenersmMediaPlayer = new MediaPlayer(this, true);mMediaPlayer.setDataSource(path);if (surf == null) {surf = new Surface (surfaceTexture);}mMediaPlayer.setSurface(surf);mMediaPlayer.prepareAsync();mMediaPlayer.setOnBufferingUpdateListener(this);mMediaPlayer.setOnCompletionListener(this);mMediaPlayer.setOnPreparedListener(this);setVolumeControlStream(AudioManager.STREAM_MUSIC);} catch (Exception e) {Log.e(TAG, "error: " + e.getMessage(), e);}}public void onBufferingUpdate(MediaPlayer arg0, int percent) {// Log.d(TAG, "onBufferingUpdate percent:" + percent);}public void onCompletion(MediaPlayer arg0) {Log.d(TAG, "onCompletion called");}public void onPrepared(MediaPlayer mediaplayer) {Log.d(TAG, "onPrepared called");mIsVideoReadyToBePlayed = true;if (mIsVideoReadyToBePlayed) {startVideoPlayback();}}@Overrideprotected void onPause() {super.onPause();releaseMediaPlayer();doCleanUp();}@Overrideprotected void onDestroy() {super.onDestroy();releaseMediaPlayer();doCleanUp();}private void releaseMediaPlayer() {if (mMediaPlayer != null) {mMediaPlayer.release();mMediaPlayer = null;}}private void doCleanUp() {mVideoWidth = 0;mVideoHeight = 0;mIsVideoReadyToBePlayed = false;mIsVideoSizeKnown = false;}private void startVideoPlayback() {Log.v(TAG, "startVideoPlayback");mMediaPlayer.start();}@Overridepublic void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {playVideo(surface);}@Overridepublic void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {}@Overridepublic boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {return false;}@Overridepublic void onSurfaceTextureUpdated(SurfaceTexture surface) {}}

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android视频旋转处理方法

更新后的代码

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