oRTP源码分析

最新推荐文章于 2021-07-28 17:19:27 发布

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最新推荐文章于 2021-07-28 17:19:27 发布

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本文链接：https://blog.youkuaiyun.com/jsn_ze/article/details/50780425

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oRTP源码分析

前言

本文主要是想在阅读oRTP协议栈时，为了以后的回忆，做些笔录。

一、AVProfile 模块

1.1 Pt的总结：

引用：http://en.wikipedia.org/wiki/RTP_audio_video_profile

RTP/AVP audio and video payload types

Payload type (PT)	Name	Type	No. of channels	Clock rate (Hz)	Description	References
0	PCMU	audio	1	8000	ITU-T G.711PCM µ-LawAudio 64 kbit/s	RFC 3551
1	reserved (previously 1016)	audio	1	8000	reserved, previously CELPAudio 4.8 kbit/s	RFC 3551,previously RFC 1890
2	reserved (previously G721)	audio	1	8000	reserved, previously ITU-T G.721 ADPCM Audio32 kbit/s	RFC 3551,previously RFC 1890
3	GSM	audio	1	8000	European GSMFull Rate Audio 13 kbit/s (GSM 06.10)	RFC 3551
4	G723	audio	1	8000	ITU-T G.723.1	RFC 3551
5	DVI4	audio	1	8000	IMA ADPCM Audio32 kbit/s	RFC 3551
6	DVI4	audio	1	16000	IMA ADPCM 64 kbit/s	RFC 3551
7	LPC	audio	1	8000	Experimental LinearPredictive Coding Audio	RFC 3551
8	PCMA	audio	1	8000	ITU-T G.711 PCM A-LawAudio 64 kbit/s	RFC 3551
9	G722	audio	1	8000	ITU-T G.722Audio	RFC 3551- Page 14
10	L16	audio	2	44100	Linear PCM16-bit Stereo Audio 1411.2 kbit/s,[2][3][4]uncompressed	RFC 3551,Page 27
11	L16	audio	1	44100	Linear PCM 16-bit Audio 705.6 kbit/s, uncompressed	RFC 3551,Page 27
12	QCELP	audio	1	8000	Qualcomm CodeExcited Linear Prediction	RFC 2658, RFC3551
13	CN	audio	1	8000	Comfortnoise. Payload type used with audio codecs that do notsupport comfort noise as part of the codec itself such as G.711,G.722.1,G.722, G.726,G.727, G.728,GSM 06.10,Siren, andRTAudio.	RFC 3389
14	MPA	audio	1	90000	MPEG-1 orMPEG-2 AudioOnly	RFC 3551, RFC2250
15	G728	audio	1	8000	ITU-T G.728Audio 16 kbit/s	RFC 3551
16	DVI4	audio	1	11025	IMA ADPCM	RFC 3551
17	DVI4	audio	1	22050	IMA ADPCM	RFC 3551
18	G729	audio	1	8000	ITU-T G.729and G.729a	RFC 3551,Page 20
25	CELB	video	1	90000	Sun'sCellB Video Encoding[5]	RFC 2029
26	JPEG	video	1	90000	JPEG Video	RFC 2435
28	NV	video	1	90000	XeroxPARC's Network Video (nv)[6]	RFC 3551,Page 32
31	H261	video	1	90000	ITU-T H.261Video	RFC 4587
32	MPV	video	1	90000	MPEG-1 and MPEG-2 Video	RFC 2250
33	MP2T	audio/video	1	90000	MPEG-2 transportstream Video	RFC 2250
34	H263	video		90000	H.263 video,first version (1996)	RFC 3551,

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