VLC and VBrick

[Talbert, Scott]

> -----Original Message-----
> From: Christophe Massiot [mailto:massiot at via.ecp.fr] 
> Sent: Tuesday, July 09, 2002 6:59 PM
> To: vlc at videolan.org
> Subject: RE: VLC and VBrick
> 
> >- The size of the UDP packets sent varies.  Most packets are 4136 
> >bytes.
> 
> 4136 ??? What sort of network are you working on ? VLC expects a MTU 
> of 1500 bytes (such as Ethernet), and that is the problem.
> 
> A temporary workaround would be to change in plugins/network/ipv4.c 
> DEFAULT_MTU to 4136. However, if you find a clean way to retrieve the 
> MTU of the interface, I'm interested.

We actually _are_ working on an Ethernet right now.  The VBrick is sending
out 4136 byte datagrams, which are getting fragmented into Ethernet frames
and reassembled into 4136 byte datagrams on the client and passed to VLC.

Why not set DEFAULT_MTU to 64K, which is the maximum size for UDP datagrams.
Then, VLC would work in all cases.  Would this cause too much of a
performance hit?

Alternatively, I wrote a function which will determine the maximum size of
UDP datagrams on a given machine.  It's not exactly pretty, but it should be
portable.  http://www.techie.net/~talbert/max_udp_datagram_size.c

Scott

-- 
This is the vlc mailing-list, see http://www.videolan.org/vlc/
To unsubscribe, please read http://www.videolan.org/lists.html
If you are in trouble, please contact <postmaster at videolan.org>