hls官方地址：https://developer.apple.com/streaming/

IDR: Instantaneous Decoding Refresh (IDR)

start code emulation prevention：3个零，插入一个‘3’： 0x00 00 00 -> 0x00 00 03 00，消除对nalu的起始码的干扰。

详细讲解：Possible Locations for Sequence/Picture Parameter Set(s) for H.264 Stream - Stack Overflow (https://stackoverflow.com/questions/24884827/possible-locations-for-sequence-picture-parameter-sets-for-h-264-stream)

ADTS: audio data transport stream

WebVTT: Web Video Text Tracks

 

苹果官方的hls工具：https://developer.apple.com/download/more/?=http%20live%20streaming%20tools

爱分享的网友：https://github.com/creeveliu/HTTPLiveStreamingTools