lix blog

Here’s a quick howto which describes how to easily dump rtmp streams from dcpt.tv.
(You won’t need wireshark for it, just rtmpdump has to be installed on your *NIX system.)

1.) Go to the respective site, e.g. Abhören für Alle by Harald Welte and check the source code of the site (ctrl + u in Firefox). – Watch out for the following lines in the html source code:


$.ajax({
url: "/elastic_streaming_client/get_streaming_server/",
success: function(data) {
$("#stage").get(0).innerHTML = '< video id="player" width="' + width + '" height="' + height + '" controls="controls" src="http :// ' + data[0].server + '/vods3/_definst/mp4:dctp_completed_media/a2dd446bdf6a4c3584a320b7decc42f1_iphone.m4v/playlist.m3u8">Dieser Browser unterstützt kein HTML5 Video';
$("#player").get(0).play();
$('#play_button').hide();
}
});


2.) Extract the string in the line url: (e.g. “/elastic_streaming_client/get_streaming_server/) and consolidate it with “http://www.dctp.tv” to “http://www.dctp.tv/elastic_streaming_client/get_streaming_server/”. Visit the site and extract the information which appears in the browser window.


[{"endpoint": "rtmpe://ec2-107-22-34-75.compute-1.amazonaws.com/securestreaming", "type": "wowza", "server": "ec2-107-22-34-75.compute-1.amazonaws.com"}]


3.) Extract the information “src=” in the line #stage from the source code of the original page (e.g. “http://’ + data[0].server + ‘/vods3/_definst/mp4:dctp_completed_media/a2dd446bdf6a4c3584a320b7decc42f1_iphone.m4v/playlist.m3u8” and consolidate the info with the “endpoint” information from the second page. (substract “/playlist.m3u8” which isn’t needed.)


rtmpe://ec2-107-22-34-75.compute-1.amazonaws.com/vods3/_definst/mp4:dctp_completed_media/a2dd446bdf6a4c3584a320b7decc42f1_iphone.m4v


4.) Open a shell and enter the following command into the command line, whereas -r defines the rtmp url and -o the option of the output filename where the file is being dumped to.


rtmpdump -r rtmpe://ec2-107-22-34-75.compute-1.amazonaws.com/vods3/_definst/mp4:dctp_completed_media/a2dd446bdf6a4c3584a320b7decc42f1_iphone.m4v -o AbhoerenFuerAlle-HaraldWelte.flv --resume


5.) Use Arista transcoder or Miro converter to convert the dumped flv file into any format.

enjoy!

[Update 15FEB2014]
Georg wrote dctp-dl, a command line tool to download the video file as mp4 directly.