I have written an application which triggers an IP Camera to stream it’s data (MPEG4) over RTP. This works fine so far – I start to setup and start the stream with the corresponding RTSP commands ( DESCRIBE, SETUP and PLAY ).
While streaming I receive the usual Sender Reports and send my own Receiver Reports – Everything is working fine here.
Now with the application mentioned above, I do NOT read the stream. I have a seperate hardware , which just logs all the stuff going over the Ethernet ( a little bit like Wireshark ). Now when the whole streaming is finished I can download those logs from my hardware and extract data from them.
So what I have then is a logfile with all the data from the RTP stream as raw data.
My question would now is: How do I write this appropriately into a MPEG4 file? I know this is a very broad question and I don’t expect to get a step-by-step tutorial. But actually I am a bit overwhelmed and don’t know where to start.If I just memcpy all the Payload from the RTP messages sequentially into a MPEG4 file it doesn’t work. Now I am also a bit confused by SDP and stuff.
Well maybe someone has a link or some help for me..?
I actually changed from MPEG4 to H.264 – it actually was a little bit easier to write a video file like this. For H.264 this answer covers it pretty much:
How to process raw UDP packets so that they can be decoded by a decoder filter in a directshow source filter