How to support RTSP playback H.265 (HEVC) stream

With the popularity of H.265, more and more developers hope that the big bovine live SDK can support low-delayed RTSP H.265 play, and share relevant experience: Implementation: For RTSP, playing H265 as long as you correctly resolve SDP and RTP packages. Some of these related content will be made below. 1. H265 NAL Unit Header brief introduction: The H264 NAL Unit head is a byte, 265 becomes two bytes: F: 1 bit. Forbidden_zero_bit. 265 The requirement is 0, which is 1 point indicating syntax violation. TYPE: 6 BITS. NAL type. VPS is 32, SPS is 33, PPS is 34, the prefix SEI is 39. IDR is 19 and 20. Layerid: 6 bits. Nuh_layer_id. Now is 0, which may be expanded in the future. TID: 3 bits. Nuh_temporal_id_plus1. TemporalID is TID-1. 2. SDP parameter introduction: 2.1 IETF The media subtype assigned to H265 is as follows: Type Name: Video Subtype Name: H265 Optional Parameters: Profile-Space, Tier-Flag, Profile-ID, Profile-Compatibility-Indicator, Interop-Constraints, Level-ID, Sprro -Sub-layer-id, rv-sub-layer-id, max-recv-level-id, tx-mod, sprop-vps, sprop-sps, sprop-pps, etc., please refer to the relevant documentation, it is recommended to resolve Spropp -VPS, SPROP-SPS, Sprop-PPS. 2.2 SDP Example: M = Video 0 RTP / AVP 96 A = RTPMAP: 96 H265 / 90000 A = FMTP: 96 Profile-Space = 0; Profile-id = 0; tier-flag = 0; Level-id = 0; Interop -constraints = 000000000000; sprop-vps = QAEMAf // AIAAAAMAAAMAAAMAAAMAALUCQA ==; sprop-sps = QgEBAIAAAAMAAAMAAAMAAAMAAKACgIAtH + W1kkbQzkkktySqSfKSyA ==; sprop-pps = RAHBpVgeSA == encoding name must be noted: H265, Clock reate must be 90,000. 3. RTP packaging format In fact, in fact, in two formats, one is a NAL unit packaged into an RTP package. One is that the NAL unit is relatively large, the fragmentation is packaged in multiple RTPs. 3.1 Single NAL unit package: PayloadHDR fills the NAL unit head. 3.2 NAL unit shard package: PayLoadHDR or copy NAL unit head, but to replace Type to 49. Fu Header is a byte, the format is as follows: +------------- + | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | + - + + - + + - + + - + - + - + | S | E | FUTYPE | + --------------- + S: To 1 represents the first fragment. E: 1 means indicating the last fragmentation. Futype is the actual NAL TYPE type. 4. Summary: The H265 is similar to the H264, and there are SPS and PPS, and the NAL unit is separated by 00 00 00 01. Related Information Sharing: RTP PAYLOAD FORMAT for Hevc: http: //pike.lysator.liu.se/docs/ietf/rfc/77/rfc7798.xml

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