Jeremy,
Thanks.
It works on some h264 sources but not on some other sources.
I came cross this message on the vlc list,
http://mailman.videolan.org/pipermail/vlc-devel/2005-July/018249.html
and a reply
http://mailman.videolan.org/pipermail/vlc-devel/2005-July/018262.html
It mentioned you need to to gather a whole frame before give it to ffmpeg
decoder. Maybe I should take look at that.
BTW, the decoder I'm interested to use is the MPCVideoDecoder from mpc-hc
project, it supports hardware acceleration but it also use ffmpeg code.
Thanks,
Dong
Jeremy Noring wrote:
I've written something similar using FFDShow's decoder filter that works
fine, so it sounds like something in your directshow filter
implementation is wrong; I'd try the dshow newsgroups.
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
<http://msdn.microsoft.com/en-us/library/dd757808%28VS.85%29.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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Where are we going?
And why am I in this hand-basket?
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