[Live-devel] UDP packets appear to be empty, forcing switch to TCP in VLC

[Ross Finlayson]

> Thanks for the quick response.  I have upgraded both the client and server to the May 3rd 2015 edition and the result appears to be the same.  On the receiving side I am still getting packets which appear to contain data (or random garbage), and the head == tail, so the frame size is zero.  VLC still does the switching to TCP thing.  I suspect I am doing something wrong in sending my frames, not sure what.  And if so, why would it work over TCP?
> 
> 

If the problem were with the data that you were streaming, then it’s unlikely that streaming would work over TCP, but not UDP.  But to be sure, I suggest first running the (unmodified) “LIVE555 Media Server” application <http://www.live555.com/mediaServer/ <http://www.live555.com/mediaServer/>>, to test streaming from a file.  I suspect, though, that you’ll see the same result: streaming RTP/RTCP-over-TCP will work, but RTP/RTCP-over-UDP won’t.

In my experience, problems with receiving RTP/RTCP-over-UDP are almost always caused by the presence of a firewall - somewhere between the server and client - that’s blocking UDP packets.


Ross Finlayson
Live Networks, Inc.
http://www.live555.com/

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