我之前曾问过有关如何检索视频文件的嵌入式 url 的问题,并已成功完成。现在我有一个不同的问题。WUnderground API 网络摄像头响应的 json 响应提供了以下 url:
https://www.wunderground.com/webcams/cadot1/902/show.html
使用 JSoup 并根据我最初问题的答案,我能够获得这个嵌入式链接:
https://www.wunderground.com/webcams/cadot1/902/video.html?month=11&year=2016&filename=current.mp4
在尝试将视频从该网址“流式传输”到 VideoView 时,我不断收到错误“无法播放视频”。查看该链接的源代码后,我注意到需要播放的视频文件没有在 html 中引用,而是在 javascript 中引用。如何获取需要播放的视频文件的直接链接?使用 JSoup 还是其他进程?
url 的来源在括号https://www.wunderground.com/webcams/cadot1/902/video.html?month=11&year=2016&filename=current.mp4
内显示了所需视频文件的以下内容:<script>
网址:“//icons.wunderground.com/webcamcurrent/c/a/cadot1/902/current.mp4?e=1480377508”
我正在使用 JSoup 从响应 url 中获取视频的嵌入 url,如下所示:
private class VideoLink extends AsyncTask<Void, Void, Void> {
String title;
@Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog.setTitle("JSOUP Test");
mProgressDialog.setMessage("Loading...");
mProgressDialog.setIndeterminate(false);
mProgressDialog.show();
}
@Override
protected Void doInBackground(Void... params) {
try {
// for avoiding javax.net.ssl.SSLProtocolException: handshake alert: unrecognized_name
System.setProperty("jsse.enableSNIExtension", "false");
// WARNING: do it only if security isn't important, otherwise you have
// to follow this advices: http://stackoverflow.com/a/7745706/1363265
// Create a trust manager that does not validate certificate chains
TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager(){
public X509Certificate[] getAcceptedIssuers(){return null;}
public void checkClientTrusted(X509Certificate[] certs, String authType){}
public void checkServerTrusted(X509Certificate[] certs, String authType){}
}};
// Install the all-trusting trust manager
try {
SSLContext sc = SSLContext.getInstance("TLS");
sc.init(null, trustAllCerts, new SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
} catch (Exception e) {
;
}
// Connect to the web site
Document doc = Jsoup.connect(TEST_URL).get();
Elements elements = doc.getElementsByClass("videoText");
// Get the html document title
for (Element link : elements) {
String linkHref = link.attr("href");
// linkHref contains something like video.html?month=11&year=2016&filename=current.mp4
// TODO check if linkHref ends with current.mp4
title = linkHref;
}
} catch (IOException e) {
e.printStackTrace();
mProgressDialog.dismiss();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
// Set title into TextView
resultTxt.setText(title);
String resVid = TEST_URL;
Log.d(TAG, "URL: " + resVid);
Uri resUri = Uri.parse(resVid);
try {
// Start the MediaController
MediaController mediacontroller = new MediaController(
MainActivity.this);
mediacontroller.setAnchorView(resultVidVw);
// Get the URL from String VideoURL
Uri video = Uri.parse(resVid);
resultVidVw.setMediaController(mediacontroller);
resultVidVw.setVideoURI(video);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
resultVidVw.requestFocus();
resultVidVw.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
// Close the progress bar and play the video
public void onPrepared(MediaPlayer mp) {
mProgressDialog.dismiss();
resultVidVw.start();
}
});
}
}
请注意,我需要对响应数组中的每个 JSONObject 执行此操作。