[FFmpeg-devel] Extracting NTP timestamp from RTCP
frothga at sandia.gov
Tue Oct 22 19:06:14 CEST 2013
Greetings FFMPEG developers!
It has been many years since I lurked this list, and perhaps few of you
will remember me after all this time.
I am working on a server that stores video from multiple IP cameras and
gives out clips based on time-of-day when the recording started. I need
to get the absolute timestamp contained in the RTCP messages from the
It seems the simplest way to do this is to read the field
RTPDemuxContext.first_rtcp_ntp_time (libavformat/rtpdec.h). Right now I
have an incredibly bad hack in my own code which includes copies of all
the necessary structs to upack the data (since these are not part of the
I would like to do this in a much cleaner manner. In order of preference:
* You tell me there is already an interface for it, and I am an idiot to
have missed it.
* I add the necessary AVOption structures to get at it, and submit a patch.
More information about the ffmpeg-devel