H264类型
需要从硬压卡上获取的NALU封装成RTMP协议格式发送给RED5/FMS进行实时发布.
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RTMP中传送 H.264使用的视频封装格式既是 FLV规范 中的 VideoTag
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Frame Type?UB [4]
Type of video frame. The following values are defined:
1 = key frame (for AVC, a seekable frame)
2 = inter frame (for AVC, a non-seekable frame)
3 = disposable inter frame (H.263 only)
4 = generated key frame (reserved for server use only)
5 = video info/command frame
CodecID?UB [4]
Codec Identifier. The following values are defined:
2 = Sorenson H.263
3 = Screen video
4 = On2 VP6
5 = On2 VP6 with alpha channel
6 = Screen video version 2
7 = AVC
AVCPacketType?F UI8
The following values are defined:
0 = AVC sequence header
1 = AVC NALU
2 = AVC end of sequence (lower level NALU sequence ender is
not required or supported)
CompositionTime?SI24
IF AVCPacketType == 1
Composition time offset
ELSE
0
See ISO 14496-12, 8.15.3 for an explanation of composition
times. The offset in an FLV file is always in milliseconds.
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在第一个RTMP Message的数据包中,需要发送?AVC sequence header, 也就是AVCDecoderConfigurationRecord
其中就包含有Profile / Level / SPS / PPS 等解码需要的信息
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然后就开始发送NALU了。
NALU在一个RTMP Message可以发送1个或者多个。
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根据 NALU的?reference idc?可以得出 帧类型
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????FrameType_VideoInfo?=?5,???
