For example, if I was on a rocket to mars and transmitting a video stream back to earth non-stop for the duration of the journey…
At the begining when I am leaving earth, the lag between me transmitting the video and earth recieving it would be basically nothing. But by the time I get to mars there is a delay of 3 minutes or whatever between send and recieve.
What happens to the video during the journey? Do some frames randomly drop? Does the video have to buffer constantly? Is there an incremental decrease in quality over time?
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Moving away will result in an apparent reduction in frame rate. The faster you go the greater the reduction. The reduction is relative to the speed of the ship. At typical human speeds the frame rate will probably be a reduction of a fraction of a frame per second. You wouldn’t really be able to notice it if the video were continuously streamed. The reduction in the frame rate would make it so that the cumulative delay could be significant so that what you are watching happened minutes to hours before (depending how far you are from the Earth). Each change in time was so small you wouldn’t notice it. It’d be like watching the hour hand of an analog clock. It doesn’t move if you watch it, but if you look at it an hour later it’s moved 1/12 of a revolution.
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