Read H264 parameters from mediarecord recording

explain :

Many used to do a test project , Want to put android Mobile video access video server , This is how it works ：

hold android The real-time video of the mobile phone is uploaded to the background forwarding server , The forwarding server packages the audio and video streams into IPC rtsp Server form , Streaming media connecting to mobile forwarding server is like connecting IPC The equipment is the same , Use rtsp Pull stream mode to get video stream .

So as to realize the mobile phone --- Forwarding server --- Video server —PC Two way communication of client .

This scheme is a simplified scheme , The mobile terminal is only responsible for packet capture playback and remote playback , The forwarding server only implements one rtsp Encapsulation does not have any other functions , Other modules are unchanged . The mobile terminal uses the top mediarecorder object , While recording echo , Pass audio and video on one side .

The mobile terminal needs to use a custom protocol to communicate with the forwarding server , Inform the server of audio and video parameters , Among them, it is very important to obtain video parameters .

how Get video parameters ？ Actually ,mediarecorder（H264） The beginning of the recorded data of contains SPS and pps Parameters , Analyze it and take it out , And the same equipment 、 Obtained with the same configuration sps,pps It's all the same , Just get it when you start the interface , You don't need to get it later .

How to get H264 What about parameters? ？

Solution :

1、 Set the video decoding parameter of the recording to H264

2、 Skip the file header after obtaining the video data :

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 3、 The back is SPS and PPS:

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This will find the video parameters , And then it's packaged , Tell the server .

Reference resources ：

I seem to have written an article about sps,pps, At that time, I was doing h264 Slice transmission .

About ：

The editor ： Li Guoshuai

qq：9611153 WeChat lgs9611153

Time ：2022-6-26