Hi,
You can always detect when packets are lost or out of order via
checking the sequence numbers that are contained within each packet, these are
just sequential numbers contained in the packet header. The header will also
typically tell you whether this packet is the start or end of a frame.
However, usually you would not want to get the missed frames re-sent if you
have already processed more recent frames, these would be of no use to you. You
could wait for the missing data to be re-sent if it's been missed, but
typically applications such as this would use TCP to ensure reliable data
delivery. As the other reply to this mail also stated, what would you show the
user while the video was stalling? Packet loss is an inevitable part of
transmitting data over networks using UDP and some applications handle the loss
better than others.
Cheers,
Tony.
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