This data raises some interesting questions about how the sensor/camera/memory electronics works. The most obvious question is the one raised by @randomguy, why does the buffer not fill and slow the frame rate to 5 FPS when running at 30 FPS or slower? In order to make this more clear I have added a couple of lines to the frames vs time chart. It seems that the buffer that can hold ~236 frames empties at a rate of 5 FPS when data is coming in at a rate of 120 FPS or 60 FPS, but empties at a rate of ~13 FPS when data is coming in at 30 FPS or slower. Consequently at 30 FPS the buffer does not fill at ~9.3 sec with ~280 frames but fills at ~13.5 sec and 406 frames.
There is also another buffer that fills when running at 120 FPS or 60 FPS. It has a capacity of ~156 frames and empties at a rate of ~22 FPS. When running at 30 FPS or slower is never fills. That buffer is first in the data flow.
Since Sony does not share any details with us we are left to speculate about exactly how the electronics works. But at least we can measure what the result is in terms of how data flows at various camera frame rates.
May 05, 2024 at 10:50 AM
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