Real experiments

Hi Hongzi,

I am trying to run a real experiment using pensive. What I want to do is 1, setting up a server on one real PC 2, setting up another client who will watch the video from the server via the Internet

I have followed the steps in the README file under the folder “real_exp”, but it doesn’t work. The error message in the chrome_retry_log is listed as follows:

` robustMPC_0

Message: u’unknown error: unhandled inspector error: {“code”:-32000,“message”:“Cannot navigate to invalid URL”}\n (Session info: chrome=84.0.4147.105)\n (Driver info: chromedriver=2.27.440175 (9bc1d90b8bfa4dd181fbbf769a5eb5e575574320),platform=Linux 4.15.0-1067-oem x86_64)’ ` So, I tried to directly load the video from my chrome via URL of “serverIP/myindex_FIXED.html”. I also tried other algorithms. What I get is that the web load correctly, the video displayed for around 2 seconds, and then the video player freezes. I guess it successfully downloads the first chunk and the streaming doesn’t work after that.

I also check the console and get the following error message

I feel the error comes from the following code in the AbrController.js case 3: var xhr = new XMLHttpRequest(); xhr.open("POST", "http://localhost:8333", false); ... xhr.send(JSON.stringify(data));

Can I ask, am I doing the right thing if I want to achieve my goal of setting up a video server and client? If so, shall I modify the URL of “http://localhost:8333” to the IP of the server? Do you have any suggestions?

[YaxiongXiePrinceton]

Thanks, Hongzi. Yes, the problem is the server.

Also, I found another problem about the chrome_retry_log. The error message is: Message: u'unknown error: unhandled inspector error: {"code":-32000,"message":"Cannot navigate to invalid URL"}\n Such an error has also been observed by other users of Pensive in another issue.

I debugged a little bit and found that the reason is because of the URL. For example, I change the URL to url = '192.168.1.1/' + 'myindex_' + abr_algo + '.html' which is actually not correct. It should add the HTTP://, like the following: url = 'http://192.168.192.27/' + 'myindex_' + abr_algo + '.html' Hope this helps other users when they met the same problem.

[YaxiongXiePrinceton]

I saw similar questions asked in issue #65