[vlc] VLC on Web page problem

[Jean-Paul Saman]

2009/11/12 Kaliszan, Mariusz (GE EntSol, Security) <mariusz.kaliszan at ge.com>

>  Hello!
>
> We are trying to use VLC plugin on our web page to display RTSP stream. We
> embeded plugin in such way:
> <OBJECT classid="clsid:9BE31822-FDAD-461B-AD51-BE1D1C159921"
>         codebase="
> http://downloads.videolan.org/pub/videolan/vlc/latest/win32/ax
>         <?php printScales()?>
>         id="vlc"
>         events="True">
>         <param name="MRL" value="" />
>         <param name="ShowDisplay" value="True" />
>         <param name="AutoLoop" value="False" />
>         <param name="AutoPlay" value="True" />
>         <param name="StartTime" value="0" />
>         <EMBED pluginspage="http://www.videolan.org"
>                 type="application/x-vlc-plugin"
>                 progid="VideoLAN.VLCPlugin.2"
>                 <?php printScales()?>
>                 name="vlc">
>         </EMBED>
> </OBJECT>
>
> <SCRIPT type="text/javascript">startPlay();</SCRIPT>
>
> And javascript function "startPlay()" looks like that:
> function startPlay() {
>         var vlc = document.getElementById("vlc");
>         var options = new Array(":aspect-ratio=4:3");
>         var itemName = document.getElementById('mrldropdown').value;
>         var itemId = vlc.playlist.add(itemName, null, options);
>         if( itemId != -1 ) {
>                 vlc.playlist.playItem(itemId);
>         }
> }
>
> 1) The first question (not so important and not the main reason of this
> email) is why VLC starts playing even if there is no
> vlc.playlist.playItem(itemId) in the code?
>
Answer 1) That is because you set the property "AutoPlay" to true inside the
<object> declaration
                 <param name="AutoPlay" value="True" />

Please read this page for a thorough understanding of your options:
http://wiki.videolan.org/Documentation:WebPlugin

> However the real problem we have when we open page that tries to play RTSP
> stream from device where there is no video source - camera cable is
> unplugged from device that generates RTSP stream so device is available
> under specified address, but video does not exist. When the page is opened
> it's ok until we try to do anything eg. click button or click link. Then web
> browse hangs up (Internet Explorer, Mozilla Firefox) - becomes not
> responding and we need to kill web browser process or... connect video
> source - then web browser becomes operational again.
>

Which vlc version do you use?


> It seems that vlc.playlist.add method is the reason of this behaviour -
> only when it is called in the code we have such situation.
>

Could you try the same rtsp link in a standalone VLC and turn up the
verbosity of messages (See menu Tools|Messages).? And sent the resulting
data to this list.

> 2) Can you explain how vlc.playlist.add works internally or point what we
> can do to avoid such situation with web browser not responding?
>

Internally vlc.playlist.add() works the same as giving rtsp://.... as
"network input" through the GUI or commandline.

Gtz
Jean-Paul Saman
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.videolan.org/pipermail/vlc/attachments/20091113/0e0cdba1/attachment.html>