Android的媒体播放器无法正常工作 [英] android media player not working

问题描述

我想开发一个应用程序，有很多的视频嵌入到它，我想叫Android的媒体播放器，与VideoView对象的视频。但是，我得到这些奇怪的错误：

I'm trying to develop an app that has many videos embedded in it, and I'd like to call Android's Media Player, with the video on VideoView object. However, i get these strange errors:

• 在I / MediaPlayer的（2874）：信息（1,26）
• E / MediaPlayer的（2874）：错误（-4，-4）
• D / VideoView（2874）：错误：-4，-4

当我尝试播放MP4视频，或者未从我的手机录制了3GP视频。我的code是这样的：

when i try to play a mp4 video, or another 3gp video that is not recorded from my phone. My code is something like:

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.MediaController;
import android.widget.VideoView;

public class PlayTest2 extends Activity{
private MediaController ctlr;
public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.test2);

    try {
        VideoView video = (VideoView) findViewById(R.id.test2);
        // Load and start the movie
                video.setVideoPath("android.resource://com.example.child.protector/raw/output");
        ctlr=new MediaController(this);
        ctlr.setMediaPlayer(video);
        video.setMediaController(ctlr);
        video.start();
        //video.requestFocus();//this line is new
    }
    catch (Exception e) {
       Log.e("---------- this is my app --------", "error: " + e.getMessage(), e);

    }
}
}

和我的布局是这样的：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">

<VideoView
android:id="@+id/test2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center"
/>
</FrameLayout>

是不是有什么毛病我code？

Is there something wrong with my code?

和我知道，我的文件是存在的，所有的。我碰到这个code与样品3GP视频和它的工作只是罚款（但我从我的手机录制的视频并将其复制到我的电脑，然后重新包装在我的应用程序，在/ RES /生夹在Eclipse）。然而，问题是，由于某些原因，我的媒体播放器只能播放某些3GPP文件。如果我尝试将MP4转换为使用MobileMediaConverter 3GP，小青在我的笔记本电脑，但不能在此应用程序。还要注意的是，如果我打开视频作为一个文件（换句话说，调用我的三星Galaxy S手机默认视频播放器），它工作得很好（意为我的手机拥有的功能）。所以我想知道：

and i know that my file is there and all. I've run this code with a sample 3GP video and it worked just fine (but i recorded the video from my phone and copied it to my computer and then re-packaged in to my app, under the /res/raw folder in Eclipse). However, The problem is that for some reason, my media player only plays certain 3GPP files. If i try to convert a MP4 to 3GP using MobileMediaConverter, it plays on my laptop but not in this app. Also note that if i open the video as a file (in other words, invoking the default video player on my Samsung Galaxy S phone) it works just fine (meaning my phone has the capabilities). So i'm wondering:

• 这是什么毛病code？
• 这更多的是MP4转换为3GP错误？

任何帮助将是很大的AP preciated。谢谢！

Any help would be greatly appreciated. Thanks!!

推荐答案

问题是一定的转换器（使用不同的设置），将创建一个没有我的三星Galaxy Android设备上运行的视频文件。在code这里是通用的，但我认为codeC已经是这样做的H.264视频转换的时候。然后我下载了大约5视频转换器和2人会真正发挥3GPP，我的设备可以播放。因此，如果任何人有这个问题，我会建议您尝试一堆视频转换器，具有不同的codeC /音频设置。我最终能找到一个在我的具体情况制定

The problem was the certain converters (with different settings) will create a video file that doesn't run on my Samsung Galaxy android device. the code here is generic, but i think the codec has to be something like H.264 when doing the video conversion. I then downloaded about 5 video converters and 2 of them will actually make a 3GPP that my device can play. so if anyone else has this problem, i would recommend trying a bunch of video converters, with different codec/audio settings. i was eventually able to find one that worked in my particular case

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