|
Atom type
|
Data Size
|
Description
|
|
'trpy'
|
64 bits
|
Total number of bytes that will be sent, including 12-byte RTP headers, but not including any network headers
|
|
'nump'
|
64 bits
|
Total number of network packets that will be sent (if the application knows there is a 28-byte network header, it can multiply 28 by this number and add it to the 'trpy' value to get the true number of bytes sent
|
|
'tpyl'
|
64 bits
|
Total number of bytes that will be sent, not including 12-byte RTP headers
|
|
'maxr'
|
8 bytes
Two 32-bit values
|
Maximum data rate in bits per second. This atom contains two numbers:
g
, followed by
m
(both 32-bit values).
g
is the granularity, in milliseconds.
m
is the maximum data rate for that granularity. For example, if
g
is 1 second, then
m
is the maximum data rate over any 1 second. There may be multiple 'maxr' atoms, with different values for
m
and
g
. The maximum data rate calculation does not include any network headers, but does include 12-byte RTP headers. Currently, movies hinted using the QuickTime hinter component include 'maxr' atoms for 1 second (
m
=1000) and 1 minute (
m
=60000).
|
|
'dmed'
|
64 bits
|
Total number of bytes from the media track to be sent
|
|
'dimm'
|
64 bits
|
Number of bytes of immediate data to be sent
|
|
'drep'
|
64 bits
|
Number of bytes of repeated data to be sent
|
|
'tmin'
|
32 bits
|
Smallest relative transmission time, in milliseconds. This is a signed 32-bit integer, typically from -2000 to 0. Packets which should be sent earlier than the expected transmission time--for data smoothing, for example--use a negative relative transmission time.
|
|
'tmax'
|
32 bits
|
Largest relative transmission time, in milliseconds. This is a signed 32-bit integer, typically 0.
|
|
'pmax'
|
32 bits
|
Largest packet, in bytes, including 12-byte RTP header
|
|
'dmax'
|
32 bits
|
Longest packet duration, in milliseconds
|
|
'payt'
|
variable
|
32-bit payload type number, followed by rtpmap payload string (Pascal string)
|
