Android 无法使用 VideoView 播放 mp4 视频？

Question

我正在尝试使用仅包含 videoview 的全屏活动流式传输 mp4 视频。但即使它很容易在我的 galaxt s3 上播放，它也不能播放大多数设备。我怀疑它与视频编码有关（顺便说一句，您必须成为编解码器大师才能知道哪个视频播放哪个不播放）。

这是我正在使用的代码。

    //make screen full with video
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFormat(PixelFormat.TRANSLUCENT);
    setContentView(R.layout.full_screen_video);

    //get extra video source string
    Intent intent = getIntent();
    if(intent != null){
        videoSrc = intent.getStringExtra(TefalTvApp.RECIPE_VIDEO_SOURCE);
        if (DEBUG) {
            Log.d(TAG, "Recipe title : " + videoSrc);   
        }
    }

    video = (VideoView) findViewById(R.id.recipeVideo);
    controller = new MediaController(FullScreenVideoActivity.this);
    controller.setMediaPlayer(video);
    video.setMediaController(controller);
    video.setVideoPath(videoSrc);
    video.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            if (DEBUG) {
                Log.d(TAG, "Hello wworld");
            }
        }
    });

    video.setOnPreparedListener(new OnPreparedListener() {

        @Override
        public void onPrepared(MediaPlayer mp) {
            video.requestFocus();
            video.start();  
        }
    });

这是调试结果。您在调试中有视频网址。

08-23 23:25:53.349: D/RecipeDetailActivity(18179): Video src : http://www.tefaltv.com/Upload/Video/acticook_kiymalifasulye.mp4
08-23 23:25:53.379: I/ApplicationPackageManager(18179): cscCountry is not German : TUR
08-23 23:25:53.389: D/FullScreenVideoActivity(18179): Recipe title : http://www.tefaltv.com/Upload/Video/acticook_kiymalifasulye.mp4
08-23 23:25:53.399: D/VideoView(18179): onMeasure()
08-23 23:25:53.399: I/VideoView(18179):     Setting size: 480x295
08-23 23:25:53.439: I/MediaPlayer(18179): uri is:http://www.tefaltv.com/Upload/Video/acticook_kiymalifasulye.mp4
08-23 23:25:53.439: I/MediaPlayer(18179): path is null
08-23 23:25:53.439: D/MediaPlayer(18179): Couldn't open file on client side, trying server side
08-23 23:25:53.519: D/VideoView(18179): onMeasure()
08-23 23:25:53.519: I/VideoView(18179):     Setting size: 480x295
08-23 23:25:57.689: I/VideoView(18179): start()
08-23 23:25:57.739: D/VideoView(18179): onMeasure()
08-23 23:25:57.739: I/VideoView(18179):     Setting size: 480x270
08-23 23:25:57.759: E/MediaPlayer(18179): error (1, -2147483648)
08-23 23:25:57.769: I/VideoView(18179): start()
08-23 23:25:57.779: E/MediaPlayer(18179): start called in state 0
08-23 23:25:57.779: E/MediaPlayer(18179): error (-38, 0)
08-23 23:25:57.799: E/MediaPlayer(18179): Error (1,-2147483648)
08-23 23:25:57.799: D/VideoView(18179): Error: 1,-2147483648
08-23 23:25:57.799: E/MediaPlayer(18179): Error (-38,0)
08-23 23:25:57.799: D/VideoView(18179): Error: -38,0

更新： 视频编码细节： 格式：H.264、624 x 351 AAC，44100 赫兹，立体声 (L R) 每秒帧数：25 数据速率：2.23mbit/s 当前尺寸：624x351 px 实际

Answer 1

这主要是因为编码。我看到您的视频文件分辨率是 624x351，这不是标准的，所以这可能是一个原因。还要检查最大比特率和 fps，因为所有移动设备都有一些上限，就像大多数 android 手机的 30fps 一样。您应该参考此文档以使您的文件与所有 android 手机兼容。 Android Media Formats

另外，如果您可以共享编码命令（如果您正在执行一个），将很容易追踪问题。

Answer 2

我建议您使用以下代码，其中我正在成功运行我的应用程序

代码如下：

XML 文件：

     <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#f0f0f0" >

        <Button
            android:id="@+id/btnVideoGallery"
            android:layout_width="75dp"
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="15dp"
            android:text="@string/gallery" />

        <Button
            android:id="@+id/btnCancel"
            android:layout_width="120dp"
            android:layout_height="wrap_content"
            android:layout_below="@+id/btnVideoGallery"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="22dp"
            android:text="@string/cancel" />

        <TextView
            android:id="@+id/lblDisplayImage"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/btnCancel"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="10dp"
            android:text="@string/below_this_text_video_will_be_displayed"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textColor="#000000"
            android:textSize="13dp" />

        <VideoView
            android:id="@+id/vvDisplayVideo"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/lblDisplayImage"
            android:layout_marginTop="15dp" />

    </RelativeLayout>

Java 文件：

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.MediaController;
import android.widget.VideoView;

public class VideoActivity extends Activity {

    private Button btnVideoGallery,btnCancel;
    private VideoView vvDisplayVideo;
    /** The Constant PICK_VIDEO. */
    private static final int PICK_VIDEO=1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_video_options);

        btnVideoGallery=(Button)findViewById(R.id.btnVideoGallery);
        vvDisplayVideo=(VideoView)findViewById(R.id.vvDisplayVideo);
        btnCancel=(Button)findViewById(R.id.btnCancel);
        vvDisplayVideo.setVisibility(View.GONE);

        btnVideoGallery.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {

                Intent video=new Intent();
                video.setAction(Intent.ACTION_PICK);
                video.setType("video/*");
                startActivityForResult(video, PICK_VIDEO);

            }
        });

        btnCancel.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {

                Intent goStartUp=new Intent(VideoActivity.this, StartUpActivity.class);
                goStartUp.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                startActivity(goStartUp);
                finish();
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        if (resultCode==Activity.RESULT_OK && requestCode == PICK_VIDEO) {

            vvDisplayVideo.setVisibility(View.VISIBLE);
            vvDisplayVideo.setVideoURI(data.getData());
            vvDisplayVideo.setFocusable(true);
            MediaController mc=new MediaController(this);
            vvDisplayVideo.setMediaController(mc);
            Log.i("True", "Executed");
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub

        Intent goStartUp=new Intent(VideoActivity.this, StartUpActivity.class);
        goStartUp.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(goStartUp);
        finish();
        return super.onKeyDown(keyCode, event);
    }
}

您也可以根据自己的用途修改清单文件：

<manifest ...
<uses-sdk...  />
<uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.RECORD_VIDEO" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <uses-feature
        android:name="android.hardware.camera"
        android:required="false" />

<application .....
</application>

</manifest>

Answer 3

您正在流式传输的视频大小与您的视频视图大小不同