[Mp4-tech] Needed Urgent Help

[Steinberg Erez-RM96322]

Hi,
I don't think the following is not correct:
   packet loss = (seq number of last rxd RTP packet - total rtp packets rxd).
Remember that the initial Sequence Number in RTP is random.
I think It should be:
   bPacketLost = (currentSequenceNumber != (previousSequenceNumber +1));
Regards,
Erez
p.s. RFC for H.264 is RFC-3984
________________________________
From: mp4-tech-bounces lists.mpegif.org [mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of Joshi
Sent: Tuesday, July 18, 2023 8:06
To: swapnil shingvi; mp4-tech lists.mpegif.org
Subject: Re: [Mp4-tech] Needed Urgent Help
Hello Mr. Swapnil,
You have to do RTP packetization for the H.264 frames according the IETF standards.  I have forgotten the RFC for H.264 frame format.  Plz google it.
In order to calculate the packet loss, you have to have logic at RTP level.
You have to use the sequence numbers in the rtp packet in order to know how packet loss
packet loss = (seq number of last rxd RTP packet - total rtp packets rxd).
You have to convey these information in the video session using RTCP packets, Such as Sender and Receiver reports.  Pls go through the RTP/RTCP rfc to know more detalis.
Hope this info has helped u a bit to pursue your project.
Thanks
Joshi
swapnil shingvi <swapnil_shingvi yahoo.com> wrote: 
Hello All,
I am working on a research project which is related to H.264 coder/decoder. I am trying to change the bit rate of the codec depending on the varying network conditions. I am new to this field and need to get this done in a week. 
I am using JM H.264 coder/decoder downloaded from link below
http://iphome.hhi.de/suehring/tml/download/
I have written a C program which changes the quantization parameters of the config file based on the bandwidth available. I wanted to further write it for changing the bit rate based on the packet loss.I only want to simulate it on a single machine. Does anyone konw how to calcualte the packet loss. Does anyone know how to send the H.264 video over the network. Do we neeed a streaming server, or just a file transfer mechanism.
Please advice,
All help will be appreciated.
Thanks
Swapnil
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