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OMAP3530 SIP/rtp

pengfei zhan1
Intellectual 255 points
Other Parts Discussed in Thread: OMAP3530

Hi everyone,

 I'm usingsip / rtp protocol  to  receive network video data, and then decoding. BUT I encounter a problem now. I found that only when the rtp packet data size is less than 20K, the receiver is stable .but a lot of data is about 25K. I opened up for receiving data buffer size is about 800K . I do not know the reason. Please give some advise? Thank you very much!! By the way my platform is OMAP3530 .

Thank you again!

  • 0
    TI__Guru 65405 points

    Hi Pengfei,

    I recommend you to use wireshark program to analyze whether the big RTP packets arrives to your hardware. The tool allow to check the jitter between the RTP packets in the stream. If the jitter is very big the packets will be dropped but your receiving data buffer seems big enough for 40 packets of 20K.

    If the packets arrives to your hardware you could analyze on which layer are dropped.

    I will recommend you an workaround if you have the source of SIP implementation: Look at the SDP part of the INVITE and OK packets and select such packetization time (ptime) which correspond to RTP packet size less then 20K.

    BR

    Tsvetolin Shulev