Net::RTSP and checking for remote files

[geektron]

today's my day of research, it seems.

another task for this same client is to test whether or not a media file exists on a remote server. i've tried to use the "example" out of the perldoc for Net::RTSP (cargo-cult, i know, but it's a start), but there's a subroutine that's not exported referenced in the example:

use Net::RTSP;

my $rtsp = new Net::RTSP;
my $presentation = $rtsp->initialize($uri);

my $stream_uri;
$presentation->describe(
    SuccessCallback => sub {
        my $response = shift;
        my ($stream_uri, $transport_method) =                         
+   extract_sdp_info($response->content);

        my $session = $presentation->setup_session($stream_uri);

        $session->play;
        }
    );

$rtsp->run;

and that's the only code sample in the entire perldoc ... the extract_sdp_info() method/sub isn't in the exportables. (i get a "sub not found" warning trying to run that as-is. and i just get back a "1" from $presentation->describe(), even if i feed it a bogus media loction.

i did search the monestary, and RTSP/RTP streaming server in Perl! is about the most helpful node. i did grab the rtsp-ping script mentioned, but it's returning failures, though if i create the SMI files needed, i *can* stream the media in question.

i've not found anything seemingly relevant on the Helix Community site ...

i'm just looking for some analogue to LWP::head() to check for the existence of a media file on the server, but rtsp doesn't work like http.

UPDATE: looks like RTSP::Lite will do the job.

[Anonymous Monk]

extract_sdp_info is a function you need to write.