Question

A RTP packet consists of a 12-byte RTP header and
subsequent RTP payload
The 3rd and 4th byte of the header contain the
Most-Significant-Byte and Least-Significant-Byte of
the sequence number of the RTP packet
Seq Num= (MSB<<8)+LSB

char pszPacket[12];

…

long lSeq = ???? – How to get the sequence number from a packet?

Answer 1

unsigned short seq = (packet[2] << 8) | packet[3];

Note that this assumes packet is an array of unsigned char.