All things related to multicast

[Frank Fulchiero <>]

On Feb 20, 2008, at 2:32 PM, Dan Oachs wrote:
> > what mime type should be given to .sdp files in apache?
> > When you click on Media:Multicast1.sdp in
> > http://nutmeg.conncoll.edu/wiki/index.php/Multicast_testing
> I have been using application/sdp as the mime type.  You can test  
> that here:  https://gustv.gac.edu/sdpfiles/arena.sdp  If I have the  
> quicktime plug in installed, that is what usually opens it but I  
> can tell VLC to open those files instead.

Thanks, will try it. Someone also suggested using application/x-sdp

> > SECOND
> > I can receive the stream fine in VLC when I download it and drag  
> > it in the playlist, but is there any syntax to use in the Add  
> > Network (WinXP) or Open Network (OSX) dialog boxes? I tried a lot  
> > of variations, but nothing worked.
> > Can someone that is multicast-enabled try to download the file and  
> > see it if will play?
> On my Mac, I can choolse File -> Open File and paste in the sdp  
> files URL and it works.

Thanks again!


> > THIRD (will reserve the miniSAPserver questions for later)
> > Is the sdp syntax that Wirecast creates for the file something  
> > that VLC can understand, or should I write my own?
>
> Yes the sdp file that Wirecast creates works with VLC.  I know in  
> the past I have had Wirecast export the sdp file and then I upload  
> it to our server and it works.

I guess to me the remaining challenges, for this phase, is if there  
is any way to enter the multicast IP and port directly in VLC's  
File>Open Network, or Add>URL>Network (WinXP) dialog. For example,  
the H.264 multicast is on IP 233.88.214.139, audio port 5432, video  
port 5434, but there does not seem any entries that work. Is the  
video port supposed to be lower than the audio port?

Posting to wg-multicast so I don't bother anyone for more testing of  
the sdp.

Thanks,
Frank Fulchiero
Digital Media Specialist
Connecticut College