[Live-devel] H264VideoRTPSource question

[Dong Liu]

Hi,

I'm trying to write a Microsoft DirectShow source filter based on live
media's RTP implementation. For mpeg4 it works perfectly. But for H264, the
video is always jumpy. Sometimes with a lot artifacts. I tried the source
filter with Cyperlink's H264/avc decoder,  mpc-hc's MPCVideo decoder and
ffdshow's software decoder. All have the same problem.

What I did was according to Microsoft's documentation

http://msdn.microsoft.com/en-us/library/dd757808(VS.85).aspx

I created mediatype with 'AVC1' as the media type, and use the
sprop-parameter-sets from SDP as the the extra data form video format. set
dwFlags to 4.  Then call fSource->getNextFrame to get the next NALU, in the
callback function with the NALU, I put 4 bytes length before it and pass
them to the decoder.

BTW, sources are from vlc and Haivision encoder. vlc play them perfectly.
And vlc is using livemedia as well :(

Thanks,

Dong
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