[Mp4-tech] regarding H.264
Basim Javed
basimjaved gmail.com
Tue Feb 26 19:16:12 EST 2008
Hello all
First of all, I wonder if I can post my queries regarding H.264?
I am student and need to get RTP info from JM 13.2 reference encoder.
This info might be somethig like this:
Seq. no, Frame #, Slice #, Slice type, Slice size, Slice time stamp
The idea is to put one slice in one NALU/RTP packet. I am using
configuration file encoder1.cfg, in which the following 6 lines are
changed as following (as compared to the encoder.cfg provided in the
JM package):
FramesToBeEncoded = 10 # Number of frames to be coded
OutFileMode = 1 # Output file mode, 0:Annex B, 1:RTP
SliceMode = 2 # Slice mode (0=off 1=fixed #mb in
slice 2=fixed #bytes in slice 3=use callback)
SliceArgument = 1000 # Slice argument (Arguments to modes 1
and 2 above)
RateControlEnable = 1 # 0 Disable, 1 Enable
Bitrate = 64000 # Bitrate(bps)
I am not sure of many aspects of this config, e.g. if one slice is
really being placed in each NALU and RTP packet. Also using the
rtpdump tool, I generate an info file which has info about RTP
packets, does not contain a priority field of NALU (2 bits in NALU
header, called NRI), which I am looking forward to.
Could somebody help me in this stuff. I am a newbie to work in this domain.
thanks many.
regards
basim
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