RTP数据包丢失处理

Question

I am writing a jitter buffer program in c to handle rtp packets.Here RTP uses UDP for transportation so connection is not reliable and packets will not be in order and also there will be some packet loss.In case of change in packet order,i will arrange them through sequence number(in RTP header information) but how can i handle or compensate packet loss?(because packet loss is not in my hand)

Note: I am handling h264 as payload and they asked me to use only RTP header

Answer 1

You can't. Short of fabricating the lost data there's nothing you can do.

Hopefully the actual encoding used within the RTP packets can help the actual recipient deal with packet loss a little better. Short of you decoding the RTP payload and acting as a codec for the payload there's nothing that you can do that the codec wont do anyway.

With H.264 each RTP packet will contain either a whole NAL unit, a NAL unit fragment or, perhaps, multiple NAL units. The H.264 codec will just expect to be fed the stream of NAL units and IT will know what to do if there is packet loss.

Answer 2

In short, as others said it as well, you can't.

If packets are lost randomly following a uniform distribution, you can protect your stream by adding FEC to it.