一种播放远程 TS 格式媒体文件的新方案

2021 年 12 月 23 日
本文字数：2062 字
阅读完需：约 7 分钟

1.背景

有一个需求是，有一个录音回放页面，支持播放服务器上的录像文件，容器格式为 TS，音频编码为 opus，视频为 h264。尝试使用 Google ExoPlayer 来播放，但发现有画面无声音，原因是不支持音频对应的 pid，无正确解析。今天尝试使用 vlc 库来处理，实践证明，vlc 的兼容性会更强一些，可以正常实现播放的需求，音频、视频解码正常。

2.集成与编译问题修复

修改 build.gradle 添加 libvlc 依赖：

implementation 'org.videolan.android:libvlc-all:3.4.7'

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可能出现的编译失败报错

More than one file was found with OS independent path 'lib/arm64-v8a/libc++_shared.so'

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解决方法：

packagingOptions {        exclude 'META-INF/androidx.legacy_legacy-support-v4.version'        exclude 'META-INF/annotation-experimental_release.kotlin_module'        pickFirst 'lib/arm64-v8a/libc++_shared.so' // 添加这两行        pickFirst 'lib/armeabi-v7a/libc++_shared.so'    }

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2.原理

activity_player.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:keepScreenOn="true"    android:background="@android:color/background_dark">
    <org.videolan.libvlc.util.VLCVideoLayout        android:id="@+id/video_layout"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:fitsSystemWindows="false"/>
</FrameLayout>

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PlayerActivity.java

/***************************************************************************** * JavaActivity.java ***************************************************************************** * Copyright (C) 2016-2019 VideoLAN * All rights reserved. * * This software may be modified and distributed under the terms * of the BSD license. See the LICENSE file for details. *****************************************************************************/import android.net.Uri;import android.os.Bundle;import android.text.TextUtils;
import androidx.appcompat.app.AppCompatActivity;
import com.besmart.annotation.BindPath;import com.nufront.trunking.common.basic.BaseActivity;import com.nufront.trunking.common.system.LogUtil;import com.nufront.trunking.common.system.ToastUtil;
import org.videolan.libvlc.LibVLC;import org.videolan.libvlc.Media;import org.videolan.libvlc.MediaPlayer;import org.videolan.libvlc.util.VLCVideoLayout;
import java.util.ArrayList;
public class PlayerActivity extends BaseActivity {    private static final boolean USE_TEXTURE_VIEW = false;    private static final boolean ENABLE_SUBTITLES = true;    private static final String ASSET_FILENAME = "bbb.m4v";
    private VLCVideoLayout mVideoLayout = null;
    private LibVLC mLibVLC = null;    private MediaPlayer mMediaPlayer = null;    private String mRemoteUrl;
    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);
        if (null == getIntent() || !getIntent().hasExtra("url")){            ToastUtil.showToast(getApplication(), R.string.config_bundle_miss_data_tip);            finish();            return;        }				// 格式为：http://ip:port/xxx.ts        mRemoteUrl = getIntent().getStringExtra("url");        LogUtil.printE(PlayerActivity.class, "播放地址: "+mRemoteUrl);
        setContentView(R.layout.activity_vlc);
        final ArrayList<String> args = new ArrayList<>();        args.add("-vvv");        mLibVLC = new LibVLC(this, args);        mMediaPlayer = new MediaPlayer(mLibVLC);
        mVideoLayout = findViewById(R.id.video_layout);
    }
    @Override    protected void onDestroy() {        super.onDestroy();        mMediaPlayer.release();        mLibVLC.release();    }
    @Override    protected void onStart() {        super.onStart();
        mMediaPlayer.attachViews(mVideoLayout, null, ENABLE_SUBTITLES, USE_TEXTURE_VIEW);        final Media media = new Media(mLibVLC, Uri.parse(mRemoteUrl));        mMediaPlayer.setMedia(media);        media.release();        mMediaPlayer.play();    }
    @Override    protected void onStop() {        super.onStop();
        mMediaPlayer.stop();        mMediaPlayer.detachViews();    }}