Android---视频模块需求-android M3U8格式视频解析

Posted 2022-12-15 怀化纱厂球迷

 最近做需求，视频看房，上传的视频，通过发送到亚马逊服务器，分片上传，上传成功后，在房屋详情页得到的url是一个M3U8格式的url，这个时候是需要自己去解析M3U8，然后获取到视频列表，以及视频清晰度内容的。

下面来介绍下M3U8

m3u8 文件格式详解 - 简书

这个网址的内容能解释 M3U8

这是后台返回的URL（含有M3U8后缀的url），可以看到有 720 480 360 格式

这是根据对应的M3U8打开后的文件内容

最后效果图

直接上代码：

class MainActivity : AppCompatActivity() 

    override fun onCreate(savedInstanceState: Bundle?) 
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        ParserThread().execute()
    





    private inner class ParserThread : AsyncTask<Void, Void, Map<String, Int>>() 
        internal lateinit var url: URL

        override fun doInBackground(vararg voids: Void): Map<String, Int>? 
            try 
                this.url = URL("https://video.591.com.tw/debug/target/house/hls/2021-07-14/130/master.m3u8")
                val urlConnection = this.url.openConnection() as HttpURLConnection
                urlConnection.connectTimeout = 60000
                urlConnection.readTimeout = 30000
                urlConnection.requestMethod = "GET"

                urlConnection.connect()

                return parseHLSMetadata(urlConnection.inputStream, this.url)

             catch (e: IOException) 
                e.printStackTrace()
            

            return null
        

        override fun onPostExecute(aVoid: Map<String, Int>?) 
            super.onPostExecute(aVoid)
            if (aVoid == null) return
            Log.d("Khaleel", "aVoid : " + aVoid)
        
    


/**
*
*这里通过正则来进行的解析匹配规则
**/

    private fun parseHLSMetadata(i: InputStream, url: URL): HashMap<String, Int>? 

        try 
            val r = BufferedReader(InputStreamReader(i, "UTF-8"))
            val segmentsMap: HashMap<String, Int>? = null
            val pattern = Pattern.compile("^#EXT-X-STREAM-INF:.*BANDWIDTH=(\\\\d+).*RESOLUTION=([\\\\dx]+).*")
            do 
                val line: String? = r.readLine() ?: break
                Log.d("M3U8Parser", "BufferedReader : " + line)
                val match = pattern.matcher(line)
                if (match.matches()) 
                    Log.d("M3U8Parser", "Output 1: " + match.group())
                    Log.d("M3U8Parser", "Output 2: " + match.group(1))
                    Log.d("M3U8Parser", "Output 3: " + match.group(2).split("x".toRegex()).dropLastWhile( it.isEmpty() ).toTypedArray()[0])
                    val renditionUrl = r.readLine()
                    Log.d("M3U8Parser", "Output 4: " + renditionUrl)
                    Log.d("M3U8Parser", "Output 5: " + url.host + "--" + url.protocol)
                    var rendition: URL
                    rendition = try 
                        URL(renditionUrl)
                     catch (e: MalformedURLException) 
                        URL(url.protocol + "://" + url.host + "/" + renditionUrl)
                    
                    Log.d("M3U8Parser", "Output 6:" + rendition.toString())
                
             while (line != null)
            r.close()
            return segmentsMap
         catch (e: IOException) 
            e.printStackTrace()
        

        return null