RFC 3551 定义的rtp header的payload type

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最新推荐文章于 2025-05-15 11:59:54 发布

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RFC 3551定义了RTP数据头部的Payload Type，其中0-127号Payload Type有静态和动态两种，96-127号可动态定义。Payload Type 13用于Comfort Noise，19号已被预留。音频、视频和音频视频混合三类Payload Type不能混用在同一RTP会话中，但可并行使用多个会话发送不同媒体类型。

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https://www.ietf.org/rfc/rfc3551.txt

6.  Payload Type Definitions

   Tables 4 and 5 define this profile's static payload type values for
   the PT field of the RTP data header.  In addition, payload type
   values in the range 96-127 MAY be defined dynamically through a
   conference control protocol, which is beyond the scope of this
   document.  For example, a session directory could specify that for a
   given session, payload type 96 indicates PCMU encoding, 8,000 Hz
   sampling rate, 2 channels.  Entries in Tables 4 and 5 with payload
   type "dyn" have no static payload type assigned and are only used
   with a dynamic payload type.  Payload type 2 was assigned to

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