Hi all, I am using ffmpeg C++ libraries for connecting to network IP cameras and retrieve the video stream through RTSP. I need to synchronize the video frames to another video stream whose frames have timestamps that come from a GPS signal. The problem is that I am not able to find the absolute timestamp of the frames I get from the cameras. pts/dts values are zero-based relative to the first frame, but I don't know how to know the absolute timestamps (for instance, relative to 1 Jan 1900). In addition, I don't know if it is actually possible.
Please, I am stuck in this point and I need urgent help with this, and I will really appreciate any help from you. Thank you so much. Kindest regards, Dídac Pérez
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