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RTP payload类型
PT Encoding Name Audio/Video (A/V) Clock Rate (Hz) Channels Reference
0 PCMU A 8000 1 [RFC3551] 1 Reserved 2 Reserved 3 GSM A 8000 1 [RFC3551] 4 G723 A 8000 1 [Vineet_Kumar][RFC3551] 5 DVI4 A 8000 1 [RFC3551] 6 DVI4 A 16000 1 [RFC3551] 7 LPC A 8000 1 [RFC3551] 8 PCMA A 8000 1 [RFC3551] 9 G722 A 8000 1 [RFC3551] 10 L16 A 44100 2 [RFC3551] 11 L16 A 44100 1 [RFC3551] 12 QCELP A 8000 1 [RFC3551] 13 CN A 8000 1 [RFC3389] 14 MPA A 90000 [RFC3551][RFC2250] 15 G728 A 8000 1 [RFC3551] 16 DVI4 A 11025 1 [Joseph_Di_Pol] 17 DVI4 A 22050 1 [Joseph_Di_Pol] 18 G729 A 8000 1 [RFC3551] 19 Reserved A 20 Unassigned A 21 Unassigned A 22 Unassigned A 23 Unassigned A 24 Unassigned V 25 CelB V 90000 [RFC2029] 26 JPEG V 90000 [RFC2435] 27 Unassigned V 28 nv V 90000 [RFC3551] 29 Unassigned V 30 Unassigned V 31 H261 V 90000 [RFC4587] 32 MPV V 90000 [RFC2250] 33 MP2T AV 90000 [RFC2250] 34 H263 V 90000 [Chunrong_Zhu] 35-71 Unassigned ? 72-76 Reserved for RTCP conflict avoidance [RFC3551] 77-95 Unassigned ? 96-127 dynamic ? [RFC3551] 除了上表中明确指定PT值的负载类型,还有些负载类型由于诞生的较晚,没有具体的PT值,只能使用动态(dynamic)PT值,即96到127,这就是为什么大家普遍指定H264的PT值为96。具体PT值的负载类型可以在这里查询到: RTP Payload Type
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