[Live-devel] Fragmented intra frames
sampsa
sampsa.riikonen at dasys.fi
Thu Sep 1 10:24:22 PDT 2016
Hi,
I am casting a webcam as H264 with ffmpeg ..
.. and then I pass the sdp file (and mediasession/subsessions) to the
live555 library.
My sink is based on the example "DummySink" class and works ok with a
variety of webcams.
However, with ffmpeg casted stream, I get frames along these lines (this
is what "afterGettingFrame" of my modified DummySink passes me):
nal_unit_type : 7 ( Sequence parameter set )
nal_unit_type : 8 ( Picture parameter set )
nal_unit_type : 5 ( Coded slice of an IDR picture )
nal_unit_type : 5 ( Coded slice of an IDR picture )
nal_unit_type : 5 ( Coded slice of an IDR picture )
nal_unit_type : 5 ( Coded slice of an IDR picture )
nal_unit_type : 1 ( Coded slice of a non-IDR picture )
nal_unit_type : 1 ( Coded slice of a non-IDR picture )
It seems that the I frame is in multiple slices. I assumed that live555
would compose the slices and give me the I frames as a single slice/nal
unit.
Is there some H264DiscreteFramer kind of filter I should be using?
Regards,
S.
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