无法在 Android VideoView 中播放 h264 流

Question

无法在 Android VideoView 中播放 h264 流

wei*_*gyn 4 java android h.264 android-mediaplayer android-videoview

我正在编写一个应用程序，它应该通过一个组件从Axis M7014 视频编码器播放 h.264 流VideoView。我的初衷是mjpg通过rtsp传输协议播放内容，但我愿意接受任何其他解决方案（与此视频编码器兼容）。谈到Axis支持，我发现通过Android本机组件可播放的格式/协议的唯一可能安排应该h.264结束rtsp。

这是Activity负责播放视频的代码。我还放了一个EditText来插入流 URI 和一个Button来开始视频：

package it.acme.tux.controllerview;

import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.VideoView;

public class CameraActivity extends Activity {
    private boolean playing = false;
    private VideoView videoView;
    private EditText textUri;
    private Button buttonPlay;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_camera);
        getActionBar().setDisplayHomeAsUpEnabled(true);

        textUri = (EditText) findViewById(R.id.video_uri);
        videoView=(VideoView) findViewById(R.id.videoView);
        buttonPlay = (Button)findViewById(R.id.action_play);

        videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mediaPlayer) {
                videoView.start();
                playing = true;
            }
        });

        videoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mediaPlayer) {
                playing = false;
            }
        });

        videoView.setOnErrorListener(new MediaPlayer.OnErrorListener() {
            @Override
            public boolean onError(MediaPlayer mediaPlayer, int i, int i1) {
                return false;
            }
        });
    }

    public void playVideo(View view)
    {
        if(!playing) {
            String uri = (String) textUri.getText();
            videoView.setVideoURI(Uri.parse(uri));
        }
        else {
            videoView.stopPlayback();
            playing = false;
        }
    }
}

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这是布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="it.acme.tux.controllerview.CameraActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <EditText
            android:id="@+id/video_uri"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/default_uri"
            android:textSize="12sp" />

        <Button
            android:id="@+id/action_play"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="playVideo"
            android:text="@string/action_play_title"
            android:textSize="12sp" />

    </LinearLayout>

    <VideoView
        android:id="@+id/videoView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_gravity="center" />

</LinearLayout>

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布局中使用的字符串：

<resources>
    <string name="action_play_title">Play</string>
    <string name="default_uri">http://192.168.10.101:8080/stream</string>
</resources>

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据我所知，OnPreparedListener它从来没有像OnCompletionListener或那样被触发OnErrorListener。我阅读了我在那里找到的所有内容，而且我也阅读了MediaPlayer课程文档，但运气不佳（我采取的唯一好建议是在OnPreparedListener触发事件后开始视频播放）。

顺便说一句，当不可用时，我以这种方式通过VLC模拟视频编码器流：

vlc.exe video.mp4 --repeat :sout=#transcode{vcodec=h264,vb=800,scale=Auto,acodec=none}:http{mux=ffmpeg{mux=flv},dst=:8080/stream} :sout-all :sout-keep
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我很确定这个流可以工作，因为我可以h.264从我用来测试我的应用程序的同一个Android手机上查看来自 VLC的流（当然使用外部查看器）。

我错在哪里？为什么OnPreparedListener事件永远不会被触发？

我也尝试过使用SurfaceView组件VideoView和MediaPlayer SurfaceHolder实例的不同方法，但我也没有运气。这是代码：

package it.acme.tux.test; import android.media.MediaPlayer; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.widget.EditText; import java.io.IOException; public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback, MediaPlayer.OnPreparedListener, MediaPlayer.OnInfoListener, MediaPlayer.OnErrorListener, MediaPlayer.OnCompletionListener { private MediaPlayer mediaPlayer; private SurfaceView videoView; private SurfaceHolder surfaceHolder; boolean play = false; private EditText textUri; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); videoView = (SurfaceView)findViewById(R.id.videoView); textUri = (EditText)findViewById(R.id.textUri); surfaceHolder = videoView.getHolder(); surfaceHolder.addCallback(this); mediaPlayer = new MediaPlayer(); mediaPlayer.setOnPreparedListener(this); mediaPlayer.setOnInfoListener(this); mediaPlayer.setOnErrorListener(this); mediaPlayer.setOnCompletionListener(this); } @Override protected void onPause() { super.onPause(); mediaPlayer.release(); } @Override protected void onDestroy() { super.onDestroy(); mediaPlayer.release(); } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceCreated(SurfaceHolder holder) { mediaPlayer.setDisplay(holder); } @Override public void surfaceDestroyed(SurfaceHolder holder) { } void playAction(View view){ try { String source = textUri.getText().toString(); Log.d("MainActivity" , "Playing: " + source); mediaPlayer.setDataSource(source); mediaPlayer.prepareAsync(); } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (IllegalStateException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } @Override public void onCompletion(MediaPlayer mediaPlayer) { Log.d("MainActivity" , "Completed"); play = false; } @Override public boolean onError(MediaPlayer mediaPlayer, int i, int i1) { Log.d("MainActivity" , String.format("Info %d/%d", i, i1)); return false; } @Override public boolean onInfo(MediaPlayer mediaPlayer, int i, int i1) { Log.d("MainActivity" , String.format("Info %d/%d", i, i1)); return false; } @Override public void onPrepared(MediaPlayer mediaPlayer) { Log.d("MainActivity" , "Prepared"); mediaPlayer.start(); play = true; } }
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我从中获得的唯一数据是从视频prepareAsync到start视频的更详细的进展（最终没有导致错误，但也没有显示任何视频）。在这种情况下，OnPreparedListener事件似乎被触发：

12-18 15:44:51.320 14445-14445/it.acme.tux.test V/MediaPlayer: setVideoSurfaceTexture 12-18 15:44:51.320 14445-14445/it.acme.tux.test V/MediaPlayer: prepareAsync 12-18 15:44:51.323 14445-14522/it.acme.tux.test V/MediaPlayer: message received msg=200, ext1=701, ext2=0 12-18 15:44:51.323 14445-14522/it.acme.tux.test W/MediaPlayer: info/warning (701, 0) 12-18 15:44:51.323 14445-14522/it.acme.tux.test V/MediaPlayer: callback application 12-18 15:44:51.323 14445-14522/it.acme.tux.test V/MediaPlayer: back from callback 12-18 15:44:51.330 14445-14445/it.acme.tux.test D/MainActivity: Info: 701 / 0 12-18 15:44:51.333 14445-14445/it.acme.tux.test V/MediaPlayer-JNI: getCurrentPosition: 0 (msec) 12-18 15:44:51.636 14445-14457/it.acme.tux.test V/MediaPlayer: message received msg=200, ext1=10972, ext2=0 12-18 15:44:51.636 14445-14457/it.acme.tux.test W/MediaPlayer: info/warning (10972, 0) 12-18 15:44:51.636 14445-14457/it.acme.tux.test V/MediaPlayer: callback application 12-18 15:44:51.636 14445-14457/it.acme.tux.test V/MediaPlayer: back from callback 12-18 15:44:51.637 14445-14445/it.acme.tux.test D/MainActivity: Info: 10972 / 0 12-18 15:44:51.638 14445-14522/it.acme.tux.test V/MediaPlayer: message received msg=5, ext1=0, ext2=0 12-18 15:44:51.638 14445-14522/it.acme.tux.test V/MediaPlayer: New video size 0 x 0 12-18 15:44:51.638 14445-14522/it.acme.tux.test V/MediaPlayer: callback application 12-18 15:44:51.639 14445-14522/it.acme.tux.test V/MediaPlayer: back from callback 12-18 15:44:58.645 14445-14458/it.acme.tux.test V/MediaPlayer: message received msg=200, ext1=702, ext2=0 12-18 15:44:58.645 14445-14458/it.acme.tux.test W/MediaPlayer: info/warning (702, 0) 12-18 15:44:58.645 14445-14458/it.acme.tux.test V/MediaPlayer: callback application 12-18 15:44:58.646 14445-14445/it.acme.tux.test D/MainActivity: Info: 702 / 0 12-18 15:44:58.647 14445-14458/it.acme.tux.test V/MediaPlayer: back from callback 12-18 15:44:58.647 14445-14445/it.acme.tux.test V/MediaPlayer-JNI: getCurrentPosition: 0 (msec) 12-18 15:44:59.645 14445-14458/it.acme.tux.test V/MediaPlayer: message received msg=1, ext1=0, ext2=0 12-18 15:44:59.645 14445-14458/it.acme.tux.test V/MediaPlayer: prepared 12-18 15:44:59.645 14445-14458/it.acme.tux.test V/MediaPlayer: callback application 12-18 15:44:59.646 14445-14445/it.acme.tux.test D/MediaPlayer: setSubtitleAnchor in MediaPlayer 12-18 15:44:59.647 14445-14458/it.acme.tux.test V/MediaPlayer: back from callback 12-18 15:44:59.652 14445-14445/it.acme.tux.test V/MediaPlayer: invoke 68 12-18 15:44:59.659 14445-14445/it.acme.tux.test D/MainActivity: Prepared 12-18 15:44:59.659 14445-14445/it.acme.tux.test V/MediaPlayer-JNI: start 12-18 15:44:59.659 14445-14445/it.acme.tux.test V/MediaPlayer: start
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我也尝试使用这个 uri：

rtsp://184.72.239.149/vod/mp4:BigBuckBunny_175k.mov
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那当然是一个h.264流rtsp。

总结一下我的请求，我需要帮助来解决这个问题。为什么视频没有播放？

是否有第三方组件可以播放 h.264 流（兼容Android Dev Studio 3.0.1）？如何播放MJPEG流？

最好的问候，迈克

Answer 1

Sav*_*een 5

我已经将 rtsp 与 wowza 一起使用。我会让你知道的几种方式

尝试一次，如果您遇到问题，请告诉我。如果您在 vlc 中的流式传输工作正常，则应用程序方面存在问题。如果这些方法不起作用，请尝试使用其他手机。它还可以帮助您。

1. 尝试使用视频视图

vvVideoPlay = (VideoView) findViewById(R.id.vvVideoPlay);
MediaController mediaController = new MediaController(this);

String videoUrl = "rtsp://184.72.239.149:8554/vid.mp4";

    mediaController.setAnchorView(vvVideoPlay);
    Uri uri = Uri.parse(videoUrl);
    vvVideoPlay.setVideoURI(uri);
    vvVideoPlay.setMediaController(mediaController);
    vvVideoPlay.requestFocus();

    vvVideoPlay.setOnPreparedListener(new OnPreparedListener() {

        @Override
        public void onPrepared(MediaPlayer mp) {

            mp.start();
            pdialog.dismiss();
            mp.setOnVideoSizeChangedListener(new OnVideoSizeChangedListener() {

                @Override
                public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {

                    mp.start();
                }
            });
        }
    });

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2. 直接用手机播放器试试

startActivity(new Intent(Intent.ACTION_VIEW,
                Uri.parse("rtsp://184.72.239.149:8554/vid.mp4")));

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3. 第三种方法尝试在您的应用程序中使用带有自定义播放器的库。

第1步。将它添加到你的gradle

compile "fm.jiecao:jiecaovideoplayer:4.7.0"

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第2步。将其添加为 xml 布局中的视频播放。

<fm.jiecao.jcvideoplayer_lib.JCVideoPlayerStandard
    android:id="@+id/videoPlayer"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

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第 3 步。从这里检查如何在您的班级中使用此库，

public class PlayVideoActivity extends BaseActivity {

@BindView(R.id.videoPlayer)
JCVideoPlayerStandard mVideoPlayer;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    restoreFromIntent(getIntent());
}

@Override
public int getLayout() {
    return R.layout.activity_play_video;
}


// get video path from intent and play the video here
private void restoreFromIntent(Intent intent) {

    mVideoPlayer.setUp("rtsp://184.72.239.149:8554/vid.mp4"
            , JCVideoPlayerStandard.SCREEN_LAYOUT_LIST, "");
}

@Override
public void onBackPressed() {
    if (JCVideoPlayer.backPress()) {
        return;
    }
    super.onBackPressed();
}

@Override
protected void onPause() {
    super.onPause();
    JCVideoPlayer.releaseAllVideos();
}
}

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希望这能帮助您解决问题。谢谢

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