在 android 视频视图中流式传输视频
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【中文标题】在 android 视频视图中流式传输视频【英文标题】：streaming video in android video view 【发布时间】：2013-04-16 08:13:09 【问题描述】：我想在视频视图中播放视频，我问如何将 url 转换为 rstp 我收到了将 url 转换为 rstp 的好人代码。 实施此代码时，我收到质量差的视频。
当我搜索如何修复质量时，我喜欢这个链接 Get the download URL for YouTube video (android/Java)
我的问题是如何让这段代码工作...... 我将此代码复制到我的 Eclipse 并在这些行中收到错误编译器：
ArrayList 视频 = 新的 ArrayList();
progressDialog = ProgressDialog.show(ARViewer.this, "", "正在连接到 YouTube...", true);
任何建议如何解决此错误？？？？ 这对我很有帮助……
谢谢...
【问题讨论】：
请具体说明您遇到的编译器错误？您也可以尝试清理并构建项目。 这是一个编译器错误，我无法运行此代码，在这一行： ArrayList 这个链接会帮助你***.com/questions/16005009/… 我有同样的问题，如果有人找到答案，请分享。这个问题应该怎么解决！？ 【参考方案1】：将 ARViewer.this 替换为 YourActivityName.this，因为 ARViewer 只是代码所在的类名。
【讨论】：
【参考方案2】：RAViewer It Just Activity Name 用您的 Activity 名称替换 Like 这个
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.CoreProtocolPNames;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MainLauncher extends AppCompatActivity
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_launcher);
new YouTubePageStreamUriGetter().execute("https://www.youtube.com/watch?v=4GuqB1BQVr4");
class Meta
public String num;
public String type;
public String ext;
Meta(String num, String ext, String type)
this.num = num;
this.ext = ext;
this.type = type;
class Video
public String ext = "";
public String type = "";
public String url = "";
Video(String ext, String type, String url)
this.ext = ext;
this.type = type;
this.url = url;
public ArrayList<Video> getStreamingUrisFromYouTubePage(String ytUrl)
throws IOException
if (ytUrl == null)
return null;
// Remove any query params in query string after the watch?v=<vid> in
// e.g.
// http://www.youtube.com/watch?v=0RUPACpf8Vs&feature=youtube_gdata_player
int andIdx = ytUrl.indexOf('&');
if (andIdx >= 0)
ytUrl = ytUrl.substring(0, andIdx);
// Get the html response
String userAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0.1)";
HttpClient client = new DefaultHttpClient();
client.getParams().setParameter(CoreProtocolPNames.USER_AGENT,
userAgent);
HttpGet request = new HttpGet(ytUrl);
HttpResponse response = client.execute(request);
String html = "";
InputStream in = response.getEntity().getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder str = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
str.append(line.replace("\\u0026", "&"));
in.close();
html = str.toString();
// Parse the HTML response and extract the streaming URIs
if (html.contains("verify-age-thumb"))
Log.e("Downloader","YouTube is asking for age verification. We can't handle that sorry.");
return null;
if (html.contains("das_captcha"))
Log.e("Downloader","Captcha found, please try with different IP address.");
return null;
Pattern p = Pattern.compile("stream_map\": \"(.*?)?\"");
// Pattern p = Pattern.compile("/stream_map=(.[^&]*?)\"/");
Matcher m = p.matcher(html);
List<String> matches = new ArrayList<String>();
while (m.find())
matches.add(m.group());
if (matches.size() != 1)
Log.e("Downloader","Found zero or too many stream maps.");
return null;
String urls[] = matches.get(0).split(",");
HashMap<String, String> foundArray = new HashMap<String, String>();
for (String ppUrl : urls)
String url = URLDecoder.decode(ppUrl, "UTF-8");
Pattern p1 = Pattern.compile("itag=([0-9]+?)[&]");
Matcher m1 = p1.matcher(url);
String itag = null;
if (m1.find())
itag = m1.group(1);
Pattern p2 = Pattern.compile("sig=(.*?)[&]");
Matcher m2 = p2.matcher(url);
String sig = null;
if (m2.find())
sig = m2.group(1);
Pattern p3 = Pattern.compile("url=(.*?)[&]");
Matcher m3 = p3.matcher(ppUrl);
String um = null;
if (m3.find())
um = m3.group(1);
if (itag != null && sig != null && um != null)
foundArray.put(itag, URLDecoder.decode(um, "UTF-8") + "&"
+ "signature=" + sig);
if (foundArray.size() == 0)
Log.e("Downloader","Couldn't find any URLs and corresponding signatures");
return null;
HashMap<String, Meta> typeMap = new HashMap<String,Meta>();
typeMap.put("13", new Meta("13", "3GP", "Low Quality - 176x144"));
typeMap.put("17", new Meta("17", "3GP", "Medium Quality - 176x144"));
typeMap.put("36", new Meta("36", "3GP", "High Quality - 320x240"));
typeMap.put("5", new Meta("5", "FLV", "Low Quality - 400x226"));
typeMap.put("6", new Meta("6", "FLV", "Medium Quality - 640x360"));
typeMap.put("34", new Meta("34", "FLV", "Medium Quality - 640x360"));
typeMap.put("35", new Meta("35", "FLV", "High Quality - 854x480"));
typeMap.put("43", new Meta("43", "WEBM", "Low Quality - 640x360"));
typeMap.put("44", new Meta("44", "WEBM", "Medium Quality - 854x480"));
typeMap.put("45", new Meta("45", "WEBM", "High Quality - 1280x720"));
typeMap.put("18", new Meta("18", "MP4", "Medium Quality - 480x360"));
typeMap.put("22", new Meta("22", "MP4", "High Quality - 1280x720"));
typeMap.put("37", new Meta("37", "MP4", "High Quality - 1920x1080"));
typeMap.put("33", new Meta("38", "MP4", "High Quality - 4096x230"));
ArrayList<Video> videos = new ArrayList<Video>();
for (String format : typeMap.keySet())
Meta meta = typeMap.get(format);
if (foundArray.containsKey(format))
Video newVideo = new Video(meta.ext, meta.type,
foundArray.get(format));
videos.add(newVideo);
Log.d("Downloader","YouTube Video streaming details: ext:" + newVideo.ext
+ ", type:" + newVideo.type + ", url:" + newVideo.url);
return videos;
private class YouTubePageStreamUriGetter extends AsyncTask<String, String, String>
ProgressDialog progressDialog;
@Override
protected void onPreExecute()
super.onPreExecute();
progressDialog = ProgressDialog.show(MainLauncher.this, "",
"Connecting to YouTube...", true);
@Override
protected String doInBackground(String... params)
String url = params[0];
try
ArrayList<Video> videos = getStreamingUrisFromYouTubePage(url);
if (videos != null && !videos.isEmpty())
String retVidUrl = null;
for (Video video : videos)
if (video.ext.toLowerCase().contains("mp4")
&& video.type.toLowerCase().contains("medium"))
retVidUrl = video.url;
break;
if (retVidUrl == null)
for (Video video : videos)
if (video.ext.toLowerCase().contains("3gp")
&& video.type.toLowerCase().contains(
"medium"))
retVidUrl = video.url;
break;
if (retVidUrl == null)
for (Video video : videos)
if (video.ext.toLowerCase().contains("mp4")
&& video.type.toLowerCase().contains("low"))
retVidUrl = video.url;
break;
if (retVidUrl == null)
for (Video video : videos)
if (video.ext.toLowerCase().contains("3gp")
&& video.type.toLowerCase().contains("low"))
retVidUrl = video.url;
break;
return retVidUrl;
catch (Exception e)
Log.e("Downloader","Couldn't get YouTube streaming URL", e);
Log.e("Downloader","Couldn't get stream URI for " + url);
return null;
@Override
protected void onPostExecute(String streamingUrl)
super.onPostExecute(streamingUrl);
progressDialog.dismiss();
if (streamingUrl != null)
/* Do what ever you want with streamUrl */
【讨论】：
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