Android的视频，听到声音，但没有视频 [英] android video, hear sound but no video

问题描述

我已经尝试了几种不同的例子，但我不能让任何视频显示。我听到声音，但没有视频。我想，也许我只是有一个不正确的视频格式，所以我下载了一个菲亚特的商业3GP格式和仍然没有喜悦。我使用Eclipse的Java EE与Android SDK和我的应用程序目标1.5 SDK（API等级3），而谷歌的API。可能有人请张贴链接到已知的视频在Android的播放或指出我的问题与code。我已经尝试了所有我能想到的..有/无prepare ..不同的布局等。

I have tried several different examples but I cannot get any video to show. I hear sound but no video. I thought maybe I just had a incorrect video format so I downloaded a fiat commercial in 3gp format and still no joy. I am using the Eclipse Java EE with android sdk and my app targets the 1.5 sdk (Api Level 3) without google api. Could someone please post a link to a video known to play in android or point out my problem with the code. I have tried all I could think of .. with/without prepare .. different layouts etc.

下面是我在活动的onCreate

Here is my onCreate in activity

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);

this.setContentView(R.layout.video_test);
    SurfaceView v = (SurfaceView) findViewById(R.id.surface_video); 
    SurfaceHolder holder = v.getHolder(); 
 // Set the transparency 
    //getWindow().setFormat(PixelFormat.UNKNOWN); 


    // Set a size for the video screen 
    //holder.addCallback(this); 
    holder.setFixedSize(400,300); 


    MediaPlayer mp = MediaPlayer.create(this, R.raw.fiat); 
    mp.setDisplay(holder);
    //mp.setAudioStreamType(2); 
    try {
        //mp.prepare();
        mp.start();
    } catch (IllegalStateException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

她是video_test.xml布局

her is the layout in video_test.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
> 
<SurfaceView android:id="@+id/surface_video" 
android:layout_width="250px" 
android:layout_height="250px"> 
</SurfaceView> 
<LinearLayout 
android:orientation="horizontal" 
android:layout_height="wrap_content" 
android:layout_width="fill_parent" 
android:padding="10dip" 
> 
</LinearLayout> 
</LinearLayout> 

>块引用

推荐答案

如果您使用的是仿真器，它可能无法正常工作。仿真器缺少硬件加速的Andr​​oid设备使用。例如，在一个2.6GHz的酷睿2，我有时可以得到一个视频播放，但并非总是如此。在速度较慢的计算机，视频播放永远不会奏效。在一个2.5GHz的酷睿2四核，我总是得到的视频播放。话虽这么说，我通常在实际设备上测试视频播放。

If you are using the emulator, it may not work. The emulator lacks the hardware acceleration available in Android devices. For example, on a 2.6GHz Core 2 Duo, I sometimes can get a video to play back, but not always. On slower machines, video playback never works. On a 2.5GHz Core 2 Quad, I always get video playback. That being said, I usually test video playback on actual devices.

我也是不确定的，如果视频播放的作品从原料资源。我强烈建议你尝试使用视频从一个文件在SD卡上的第一。

I am also uncertain if video playback works from raw resources. I strongly encourage you to try using a video from a file on the SD card first.

对于影片肯定的工作，我知道，纪录片与你和音乐为我们的孙子从的此处在他们的MP4形式的工作。

With respect to videos that definitely work, I know that "Documentaries and You" and "Music for our Grandchildren" from here work in their MP4 forms.

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