1MP4(3)                      MP4 File Format Library                     MP4(3)
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NAME

6       MP4GetHintTrackRtpPayload  - Get the RTP payload parameters of the hint
7       track
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SYNTAX

10       #include <mp4.h>
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12       bool MP4GetHintTrackRtpPayload(
13            MP4FileHandle hFile,
14            MP4TrackId hintTrackId,
15            char** ppPayloadName = NULL,
16            u_int8_t* pPayloadNumber = NULL,
17            u_int16_t* pMaxPayloadSize = NULL
18       )
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ARGUMENTS

21       hFile  Specifies the mp4 file to which the operation applies.
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23       hintTrackId
24              Specifies the hint track to which the operation applies.
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26       ppPayloadName
27              Specifies a pointer to the variable to receive  the  string  RTP
28              payload name.
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30       pPayloadNumber
31              Specifies  a  pointer to the variable to receive the RTP payload
32              number.
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34       pMaxPayloadSize
35              Specifies a pointer to the variable to receive the  maximum  RTP
36              payload size in bytes.
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RETURN VALUES

39       Upon success, true (1). Upon an error, false (0).
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DESCRIPTION

42       MP4GetHintTrackRtpPayload  gets the RTP payload parameters for the hint
43       track. The RTP payload is the set of rules by which media  samples  are
44       packed  into  RTP  packets. This call is typically used in constructing
45       the SDP media level description for the hint track.
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47       The payloadName identifies which RTP payload is being used for the  RTP
48       packets created from the hint track. This value is sent to the receiver
49       in the SDP description. For example, MP3 audio sent  according  to  the
50       rules in IETF RFC 2250 uses the name "MPA" for the RTP payload.
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52       The  payloadNumber  is a shorter form of the payloadName. This value is
53       associated with the payload name in the SDP description and  then  sent
54       in  every RTP packet. Payload numbers 1 thru 95 are statically assigned
55       in IETF RFC 1890, numbers 96 thru 127 are dynamically assigned within a
56       session.
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58       The maxPayloadSize specifies the maximum number of bytes that should be
59       placed in the RTP payload section of the RTP packets.
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SEE ALSO

62       MP4(3) MP4SetHintTrackPayload(3)
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66Cisco Systems Inc.                Version 0.9                           MP4(3)
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