Hi all,*
*
*Problem:*
In my case, bit stream coming from h264 encoder which is feed by live
camera. Bitstream is sending by live555 library using RTSP protocol.
RTSP packets are received by one of rtsp client like vlc player( the
most important), totem player, mplayer. I need to know how to set lower
framerate because my camera produces 9 fps but most of RTSP clients are
expecting in default 25 fps and it cause that video stream is not played
properly ( buffered, dropping late packets etc.).
I am using testOnDemandRTSPServer example code from live555. I have
wrote my implementation of DeviceSource class. I have set presentation
time properly:
|gettimeofday(&fPresentationTime, NULL); fDurationInMicroseconds = 1100000; |
Sequence Parameter Set NAL also contains proper timing infos:
|timing_info_present_flag : 1 num_units_in_tick : 1001 time_scale : 9000
fixed_frame_rate_flag : 1|
According to
http://lists.live555.com/pipermail/live-devel/2010-August/012504.html
I have added to RTSP Header framerate param:
|a=framerate:9.0|
Unfortunately it doesn't help. I have thought that video player will be
calmly waiting for new frame and framerate will be correlated with
frequency of receiving another RTP packets (another NALs).
*Question:*
I would like to know how frame rate is read from bit stream (or
evaluated) by RTSP client (playback software). Where this informations
are stored and how are sending to playback software?
*More infos:*
http://stackoverflow.com/questions/36332455/how-frame-rate-is-calculated-or-read-from-h264-bitstream-sending-through-rtsp-pr
Best regards
--
Paweł Domagalski
Software Engineer
Mobica Ltd.
www.mobica.com
Mobica is a provider of innovative, cutting-edge software engineering, testing and
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