[Live-devel] Adding a codec

[Luc Roels]

Hi,
 
Suppose a video server has been created that streams a non compliant H.264 stream ( a so called modified H.264 that's absolutely not compatible with the H.264 bitstream, no NAL's etc... )
 
I have to create a client application that can connect to such a server using RTSP, receive the modified H.264 video stream, decode it and render it on the screen.
 
How do I go about this? Since the MediaSubsession::initiate() function will not recognize the codec, I suppose I will have to change this function to create a 'ModifiedH264VideoRTPSource' and then create a ModifiedH264VideoRTPSource class derived from MultiFramedRTPSource. Am I correct? Is this the only thing I that needs to be done?
 
Bonus question. If the doNormalMBitRule is active, what happens if let's say an RTP packet belonging to the frame gets lost? Do you get a partial frame or non at all? How can you detect that a frame or part of the frame is lost?
 
best regards,
 
Luc Roels
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