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Full Intra Request

The "Full Intra Request" items are identified by the item Type "FIR" (96).

0                   1                   2                   3
  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 |F|   FIR=96    |  length = 1   |           reserved            |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

These packets indicate that a site has lost all video synchronization, and requests the source to send the next image in "Intra" coding mode, i.e. without using differential coding to speed the recovery. The various fields are defined as follows:

________________________________________________
      | F      |   Last option bit, as defined by RTP.|
      |________|______________________________________|
      | FIR    |   Full INTRA Request (96)            |
      |________|______________________________________|
      | Length |   In 32-bits word.                   |
      |________|______________________________________|