scotth

go http 下载视频(TS码流文件)(推荐一个网站学习 go example)


视频  http下载代码 dn.go(注意:代码很ugly,没怎么花时间)

总体感觉特别简单,网上看了下 net/http ,io这2个库的使用, 几分钟就写完了,感觉cpp 在做工具这块 开发效率的确差太多(没有轮子的话)。

 

 

再放一个 go example 网站,https://gobyexample.com/

 

 

 

package main  
      
    import (  
        "fmt"  
        "io"  
        "net/http"  
        "os"  
        "strconv"  
    )  
/*
    var (  
        //url = "http://flv5.bn.netease.com/live163/store/208588/serverpush_18783_1521024752481_208588_0-1.ts"
        url  string = "http://flv5.bn.netease.com/live163/store/208588/serverpush_18783_1521024752481_208588_0-"
        url_suffix string = ".ts"
    )  
*/      
    func main() {
        fmt.Println("download begin.....")

        url := "http://flv5.bn.netease.com/live163/store/208588/serverpush_18783_1521024752481_208588_0-"
        url_suffix := ".ts"

        for i := 180; i <= 180; i++ {
            
            str_index := strconv.Itoa(i)        // 通过Itoa方法转换  
            //str2 := fmt.Sprintf("%d", i)      // 通过Sprintf方法转换  
            //fmt.Println(str_index)   // 打印str1  
    
            strFinal := url+str_index+ url_suffix

            res, err := http.Get(strFinal)  
            if err != nil {  
                panic(err)  
            }  
            f, err := os.Create(str_index+url_suffix)  
            if err != nil {  
                panic(err)  
            }  
            fileSize,writeErr := io.Copy(f, res.Body)

            fmt.Println(strFinal + " download done,", "file size(byte)=", fileSize)
            if writeErr != nil {  
                fmt.Println(strFinal + " download failed ",  "errorInfo=", writeErr.Error())
                panic(err)  
            }  
        }

        
        fmt.Println("download finish.")

    }  

 

 

 

-------------------

因为有些m3u8不是有规则的,

所以又写了新版本 ,按行 读取m3u8,逐行读取 ts文件(ffmpe  concat 合并文件,所以还要写  merge.txt)

ffmpeg文件合并
merge.txt 格式

```txt
file 1.ts
file 2.ts
...

file 100.ts

```

 

 


 
> .\ffmpeg.exe  -y -f concat -safe -1 -i .\record.m3u8-merge.txt -c copy -bsf:a aac_adtstoasc dst.mp4

 

代码

package main  
      
    import (  
        "fmt"  
        "io"  
        "net/http"  
		"os"  
		//"strconv"  
		"bufio"	
		"strings"
		"os/exec"

		"log"
	)
	
	func MergeVideo(mergeFile, videoName string) int{
		var nRetsult int
		nRetsult=0

		fmt.Printf("Merging video parts into %s\n", videoName)
		cmd := exec.Command("ffmpeg", "-y", "-f", "concat", "-safe", "-1",
			"-i", mergeFile, "-c", "copy", "-bsf:a", "aac_adtstoasc", videoName,
		)
		err := cmd.Run()
		if err != nil {
			log.Fatal(err)
		}

		nRetsult=1
		return nRetsult
	}

	func downloadByM3u8File(strM3u8FilePath string) int{
		var nRetsult int
		nRetsult=0

		var strSlices []string
		var strFilename string

		M3u8file, err := os.Open(strM3u8FilePath)//打开文件   //check m3u8 Is Exist

		//create ffmpeg merge file
		mergeFile := strM3u8FilePath + "-merge.txt"


		file, _ := os.Create(mergeFile) //if exist ,truncate


		defer M3u8file.Close() //打开文件出错处理 
		if nil == err {
			buff := bufio.NewReader(M3u8file) //读入缓存   		
			for {
				//line, isPrefix,err := buff.ReadLine()
				
				httpAddress, err := buff.ReadString(\'\n\') //以\'\n\'为结束符读入一行
				if err != nil || io.EOF == err {
					break
				}

				//if(strings.Contains(httpAddress, ".ts")){
				if(strings.Contains(httpAddress, "http")){
					httpAddress = strings.TrimSpace(httpAddress)
					httpAddress = strings.TrimRight(httpAddress,"\n")

					strSlices = strings.Split(httpAddress,"/")  //分离成多个 slices
					strFilename = strSlices[len(strSlices)-1]    //取最后 的文件名
					
		
					//write ffmpeg merge file
					file.Write([]byte(fmt.Sprintf("file %s\n", strFilename)))

					res, err := http.Get(httpAddress)  //获取失败?
					if err != nil {  
						panic(err)  
					}  
					


					TsFile, err := os.Create(strFilename)  
					if err != nil {  
						panic(err)  
					}  

					fileSize,writeErr := io.Copy(TsFile, res.Body) 
					TsFile.Close()

					fmt.Println(strFilename + " download done,", "file size(byte)=", fileSize)
					if writeErr != nil {  
						fmt.Println(strFilename + " download failed ",  "errorInfo=", writeErr.Error())
						panic(err)  
					}  

					


					//此行有ts文件,应该下载
					nRetsult++
					fmt.Print(httpAddress)  //可以对一行进行处理
				}
				//fmt.Print(line)  //可以对一行进行处理

			}
		}else{
			fmt.Println(strM3u8FilePath , " file do not exist")
		}

		file.Close()

		return nRetsult
	}



	/*
// M3u8URLs get all urls from m3u8 url
func M3u8URLs(uri string) []string {
	html := request.Get(uri)
	lines := strings.Split(html, "\n")
	var urls []string
	for _, line := range lines {
		line = strings.TrimSpace(line)
		if line != "" && !strings.HasPrefix(line, "#") {
			if strings.HasPrefix(line, "http") {
				urls = append(urls, line)
			} else {
				base, _ := url.Parse(uri)
				u, _ := url.Parse(line)
				urls = append(urls, fmt.Sprintf("%s", base.ResolveReference(u)))
			}
		}
	}
	return urls
}
*/
    func main() {


		//要设置launch.json的 argv 才能debug 用参数
		if( len(os.Args)!= 2 ){
			fmt.Println("参数不正确,请确认输入m3u8文件。 格式如: 1.exe a.mau8")  
			return
		}


		/*
		argsWithProg := os.Args
		argsWithoutProg := os.Args[1:] 
		*/

		arg := os.Args[1] //第二个参数  
		fmt.Println(arg) 

		//还需要 判断输入的参数个数,

		fmt.Println("download begin.....") 

		nRet := downloadByM3u8File(arg)
		fmt.Println("已下载共 %d 个ts文件",nRet) 

		//MergeVideo("1.mp4","record.m3u8-merge.txt")

		

		fmt.Println("download finish.") 

	}

 

1.代码可以用格式处理下,

2.代码比较基础,没时间写异常, 简单能用就行。

 

附: 一些网站如何获取m3u8 文件

 

1> 学堂在线( 用flash 播放器)


1.打开网站http://www.xuetangx.com/event/cvpr2017
F12查看html代码

<div class="video_container">
                <div class="wrap">
                    <div class="title" id="videoTitle">微软亚洲研究院创研论坛 CVPR 2017 论文分享会</div>
                    <div class="video_wrap cf" id="video_container"><iframe src="http://cloud.quklive.com/cloud/a/embed/1497351554750965" allowfullscreen="" width="720" height="460" frameborder="0"></iframe></div>
                    <div class="video_function cf">
                        <ul class="video_function_btn fr cf">
                            <li><a href="javascript:" id="infoShare"><span class="icon_share"></span><span>分享到...</span></a></li>
                        </ul>
                    </div>
                </div>
            </div>


注意:
"video_container" div 中有  <iframe src="http://cloud.quklive.com/cloud/a/embed/1497351554750965"

http://cloud.quklive.com/cloud/a/embed/1497351554750965就是码流地址,但是 是js加密的,


2. 打开 http://cloud.quklive.com/cloud/a/embed/1497351554750965
F12查看js 代码


在

 function onJSBridge(playerId, event, data) {
                switch(event) {
                    case "onJavaScriptBridgeCreated":
                    case "ready":
                        DM.watching("1497351554750965","http://recordcdn.quklive.com/broadcast/activity/1497351554750965/record.m3u8","record");
                        break;
                    default:;
                        break;
                }
            }

这个就是我们的码流 文件了, 用http下载把上面TS文件下载   下来,再用ffmpeg 合并就可以了。

 

2>上直播(HTML5)

http://shangzhibo.tv/watch/5833145
网站html 直接查找m3u8(当然用video, player src,等关键字 搜索)
https://shangzhibo-img.b0.upaiyun.com/client/user/100994/1526289188264/1526289188242_Session1GANandSynthesis-processed.m3u8

3>网易云音乐(HTML5)

 

 

网易云直播

http://live.163.com/room/173789.html

视频解析,可以得到 flv5.bn.netease.com/live163/store/208588/serverpush_18783_1521024752481_208588_208588_20180314185233_20180314202528_0.m3u8

 

 

4> 抖音 (HTML5)

 

 

5> bilibili

 

 

 

 

再附上一个github 项目,里面有一些其他网站  视频下载方式 

 

https://github.com/iawia002/annie

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