【OSS排查方案-4】OSS+RTMP推流的JAVA方法

張醫博發表於2018-01-29
Java

背景：目前有很多直播愛好者使用的是 OSS + RTMP 做的推流直播，其中不乏一些企業級別應用，由於 OSS 作為推流的接收略微有一些複雜，故單獨開篇講一下。其實不建議使用 OSS+RTMP 做直播推流，因為功能性相比專業的阿里雲直播幾乎為 0 ，而且效能上並不好。建議大家使用單獨的直播服務。


首先：
看下官網對於 OSS 推流的過程定義

  • 只能使用RTMP推流的方式，不支援拉流。
  • 必須包含視訊流，且視訊流格式為H264。
  • 音訊流是可選的，並且只支援AAC格式，其他格式的音訊流會被丟棄。
  • 轉儲只支援HLS協議。
  • 一個LiveChannel同時只能有一個客戶端向其推流。
RTMP 的推流格式：
rtmp://your-bucket.oss-cn-hangzhou.aliyuncs.com/live/test-channel
  • live 等同於 RTMP 的 APP 掛載點
  • test-channel 等同於 RTMP 的 stream name

RTMP URL 推流簽名：

  • rtmp://${bucket}.${host}/live/${channel}?OSSAccessKeyId=xxx&Expires=yyy&Signature=zzz&${params}
  • 推流前 LiveChannel有兩種Status：enabled和disabled，使用者可以使用本介面在兩種Status之間進行切換。處於disabled狀態時，OSS會禁止使用者向該LiveChannel進行推流操作；如果有使用者正在向該LiveChannel推流，那麼推流的客戶端會被強制斷開（可能會有10s左右的延遲）
我們現在用 java 的 SDK 演示一下如上的推理過程，在跑 SDK 之前，需要先搭建好一套本地的 eclipse 環境，如下是我用的 eclipse，如果有沒搭建請網上搜尋一下 eclpse 的搭建方式（之前需要安裝 JDK 且配置環境變數）

  • Eclipse 版本：Version: Neon.3 Release (4.6.3)
  • JDK 版本：jdk1.8.0_144
  • OSS：公開讀（為了驗證推流功能是否正常，我們用公開讀的方式快速測試）

我們採用主函式入口的方式，例項化其他類進行呼叫，這樣方便類的拆分，不用都集合在主函式中。
主函式 domain，例項化 OSSClient 物件傳入到 RtmpTest 類中測試。

所有的 jar 都會通過官方的 maven 解決的依賴關係，https://help.aliyun.com/document_detail/32009.html?spm=5176.doc32008.6.672.HR4Dbr

package javasdk;

import java.io.FileNotFoundException;
import java.text.ParseException;
import java.util.HashMap;
import java.util.Map;

import com.aliyun.oss.OSSClient;

public class domain {
	public static void main( String[] args ) throws ParseException, FileNotFoundException
    {
    	
        System.out.println( "Hello World!" );
        String accessid = "AK";
        String secretkey = "SK";
        String objectpath = "C://Users//hanli.zyb//Desktop//running.png";
        String bucket = "bucket";
        String object = "running";
        String endpoint = "http://oss-cn-hangzhou.aliyuncs.com";

        
        // OSS + rtmp 推流
        String bucketName = "ali-hangzhou";
        RtmpTest pushoss = new RtmpTest();
        OSSClient ossClient = new OSSClient(endpoint, AK, SK);
        pushoss.testCreateLiveChannel(bucketName,ossClient);

    }
}
​

RtmpTest

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package javasdk;

import java.text.ParseException;
import java.util.Date;
import java.util.List;
import junit.framework.Assert;

import org.junit.Ignore;
import org.junit.Test;

import com.aliyun.oss.OSSClient;
import com.aliyun.oss.OSSErrorCode;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.common.utils.DateUtil;
import com.aliyun.oss.model.CannedAccessControlList;
import com.aliyun.oss.model.CreateLiveChannelRequest;
import com.aliyun.oss.model.CreateLiveChannelResult;
import com.aliyun.oss.model.ListLiveChannelsRequest;
import com.aliyun.oss.model.LiveChannel;
import com.aliyun.oss.model.LiveChannelInfo;
import com.aliyun.oss.model.LiveChannelListing;
import com.aliyun.oss.model.LiveChannelStat;
import com.aliyun.oss.model.LiveChannelStatus;
import com.aliyun.oss.model.LiveChannelTarget;
import com.aliyun.oss.model.LiveRecord;
import com.aliyun.oss.model.PushflowStatus;
import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.profile.DefaultProfile;
import com.aliyuncs.profile.IClientProfile;

/**
 * Test rtmp
 */
public class RtmpTest  {
	String bucketName = "bucket";
	final String liveChannel = "stream name";
    @Test
    public void testCreateLiveChannelDefault(String bucketname,OSSClient ossClient) {

        try {
            CreateLiveChannelRequest createLiveChannelRequest = new CreateLiveChannelRequest(
                    bucketName, liveChannel);
            CreateLiveChannelResult createLiveChannelResult = ossClient.createLiveChannel(createLiveChannelRequest);
            LiveChannelInfo liveChannelInfo = ossClient.getLiveChannelInfo(bucketName, liveChannel);

            
            ossClient.deleteLiveChannel(bucketName, liveChannel);
        } catch (Exception e) {
            Assert.fail(e.getMessage());
        }
    }
    
    @Test
    public void testCreateLiveChannel(String bucketname,OSSClient ossClient) {
        final String liveChannel = "normal-create-live-channel";
        final String liveChannelDesc = "my test live channel";

        try {
            LiveChannelTarget target = new LiveChannelTarget("HLS", 100, 99, "myplaylist.m3u8");
            CreateLiveChannelRequest createLiveChannelRequest = new CreateLiveChannelRequest(
                    bucketName, liveChannel, liveChannelDesc, LiveChannelStatus.Enabled, target);
            
            CreateLiveChannelResult createLiveChannelResult = ossClient.createLiveChannel(createLiveChannelRequest);
            System.out.println(createLiveChannelResult.getPublishUrls());
            /*Assert.assertEquals(createLiveChannelResult.getPublishUrls().size(), 1);
            Assert.assertTrue(createLiveChannelResult.getPublishUrls().get(0).startsWith("rtmp://"));
            Assert.assertTrue(createLiveChannelResult.getPublishUrls().get(0).endsWith("live/" + liveChannel));
            Assert.assertEquals(createLiveChannelResult.getPlayUrls().size(), 1);
            Assert.assertTrue(createLiveChannelResult.getPlayUrls().get(0).startsWith("http://"));
            Assert.assertTrue(createLiveChannelResult.getPlayUrls().get(0).endsWith(liveChannel + "/myplaylist.m3u8"));*/
            
           /* LiveChannelInfo liveChannelInfo = ossClient.getLiveChannelInfo(bucketName, liveChannel);
            Assert.assertEquals(liveChannelInfo.getDescription(), liveChannelDesc);
            Assert.assertEquals(liveChannelInfo.getStatus(), LiveChannelStatus.Disabled);
            Assert.assertEquals(liveChannelInfo.getTarget().getType(), "HLS");
            Assert.assertEquals(liveChannelInfo.getTarget().getFragDuration(), 100);
            Assert.assertEquals(liveChannelInfo.getTarget().getFragCount(), 99);
            Assert.assertEquals(liveChannelInfo.getTarget().getPlaylistName(), "myplaylist.m3u8");*/
            
            
           // ossClient.deleteLiveChannel(bucketName, liveChannel);
        } catch (Exception e) {
            Assert.fail(e.getMessage());
        }
    }
}

其中我們最關注的是 testCreateLiveChannel 類，建立了推流地址，其中引數 LiveChannelStatus.enable 是要讓推流變為可用狀態。


public void testCreateLiveChannel(String bucketname,OSSClient ossClient) {
        final String liveChannel = "normal-create-live-channel";
        final String liveChannelDesc = "my test live channel";

        try {
            LiveChannelTarget target = new LiveChannelTarget("HLS", 100, 99, "myplaylist.m3u8");
            CreateLiveChannelRequest createLiveChannelRequest = new CreateLiveChannelRequest(
                    bucketName, liveChannel, liveChannelDesc, LiveChannelStatus.Enabled, target);
            
            CreateLiveChannelResult createLiveChannelResult = ossClient.createLiveChannel(createLiveChannelRequest);
            System.out.println(createLiveChannelResult.getPublishUrls());
            /*Assert.assertEquals(createLiveChannelResult.getPublishUrls().size(), 1);
            Assert.assertTrue(createLiveChannelResult.getPublishUrls().get(0).startsWith("rtmp://"));
            Assert.assertTrue(createLiveChannelResult.getPublishUrls().get(0).endsWith("live/" + liveChannel));
            Assert.assertEquals(createLiveChannelResult.getPlayUrls().size(), 1);
            Assert.assertTrue(createLiveChannelResult.getPlayUrls().get(0).startsWith("http://"));
            Assert.assertTrue(createLiveChannelResult.getPlayUrls().get(0).endsWith(liveChannel + "/myplaylist.m3u8"));*/
            
            
           // ossClient.deleteLiveChannel(bucketName, liveChannel);
        } catch (Exception e) {
            Assert.fail(e.getMessage());
        }
    }​

running 主函式，列印出推流地址。
rtmp://hangzhou.oss-cn-hangzhou.aliyuncs.com/live/normal-create-live-channel
請網友們自己親自搭建環境動手實際測試，有問題可隨時留言帖子。


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