I'm trying to calculate timestamps for picamera relative to the system clock in as precise a way as possible but it's not clear to me from the documentation how this can be done.
I can set the clock_mode to "raw" and get times relative to camera initialization time but I don't see a method to query the initialization time or I can use "reset" to get timestamps relative to the recording start but likewise I don't see a good way of getting a precise (ms resolution) timestamp for when recording started. I am guessing there is too much latency between my call to camera.start_recording(...) and the actual start of recording to use the system time before this call as the recording start time.
