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UDP multicast in VLC 2.1 ?

Posted: 27 Sep 2013 11:18
by dbrb2
Hi,

Not sure if this is a bug or just that the new VLC works differently:

Previously, I could open a UDP SSM multicast stream using:

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udp://<unicast_address>@<multicast_address>:<multicast_port>
In the latest stable release, I now get:

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Your input can't be opened: VLC is unable to open the MRL Your input can't be opened: VLC is unable to open the MRL ''udp://<unicast_address>@<multicast_address>:<multicast_port>'. Check the log for details.
Looking at the logs, I have:

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main debug: processing request item: udp://<multicast_address>:<multicast_port>, node: Playlist, skip: 0 main debug: resyncing on udp://<multicast_address>:<multicast_port> main debug: udp://<multicast_address>:<multicast_port> is at 5 main debug: starting playback of the new playlist item main debug: resyncing on udp://<multicast_address>:<multicast_port> main debug: udp://<multicast_address>:<multicast_port> is at 5 main debug: creating new input thread main debug: Creating an input for 'udp://<multicast_address>:<multicast_port>' main debug: using timeshift granularity of 50 MiB, in path 'C:\Users\Admin\AppData\Local\Temp' main debug: `udp://<unicast_address>@<multicast_address>:<multicast_port>' gives access `udp' demux `' path `<unicast_address>@<multicast_address>:<multicast_port>' main debug: creating demux: access='udp' demux='' location='<unicast_address>@<multicast_address>:<multicast_port>' file='\\<unicast_address>@<multicast_address>:<multicast_port>' main debug: looking for access_demux module matching "udp": 19 candidates main debug: no access_demux modules matched main debug: creating access 'udp' location='<unicast_address>@<multicast_address>:<multicast_port>', path='\\<unicast_address>@<multicast_address>:<multicast_port>' main debug: looking for access module matching "udp": 16 candidates main debug: no access modules matched main error: open of `udp://<unicast_address>@<multicast_address>:<multicast_port>' failed main debug: dead input main debug: Destroying the input for 'udp://<multicast_address>:<multicast_port>' main debug: changing item without a request (current 5/6) main debug: nothing to play

Re: UDP multicast in VLC 2.1 ?

Posted: 27 Sep 2013 19:52
by Jean-Baptiste Kempf
Try RTP, but I never knew about this syntax

Re: UDP multicast in VLC 2.1 ?

Posted: 27 Sep 2013 20:13
by dbrb2
Cheers - I'll give that a go. In fact, the stream in question comes from a VLC offshoot - dvblast:

http://www.videolan.org/projects/dvblast.html

I initially used udp rather than rtp because it allowed me to differentiate between the cache applied to rtp and udp streams from a single instance of VLC

I understand that teh various cache flags have changed in VLC 2.1 anyway though, so I'll look into what they are now :-)

Thanks!