Hi,
I suspect that this question might have come up before and, if so, I apologise. I have almost completed my second Portsdown and decided to give it a quick test, video only, no RF. The RPi is the older version 3 running an early version of the Stretch Software. The display is the usual 3 inch waveshare.The camera is the latest RPi cam. but fitted with a 0.5Metre lead. (ribbon).I can see the cam's output on the touchscreen, its fine as a static picture but useless when there is any movement, the frame rate appears to be very slow, less than 10 frames per second I would guess and accompanied by what almost looks like hum bars but thats probably just the low refresh rate. The voltage on the RPi is 5.2V, obtained from a Buck regulator unit. I have not yet had an opportunity to view the picture on the RF receiver and, perhaps what I am seeing is normal. Any comments please?
Gordon (G3ZYL)
Low Frame rate on Touchscreen
Re: Low Frame rate on Touchscreen
Hi Gordon
The refresh rate on the 3.5 inch touchscreen is only about 3 or 4 frames per second. So it sounds like what you are seeing is perfectly normal. The transmitted picture is (normally) smooth.
Dave
The refresh rate on the 3.5 inch touchscreen is only about 3 or 4 frames per second. So it sounds like what you are seeing is perfectly normal. The transmitted picture is (normally) smooth.
Dave
Re: Low Frame rate on Touchscreen
Hi Dave,
Many thanks for your helpful reply; I can now stop worrying. I have, in fact, now been able to confirm that the composite video output is fine. The 4-way socket on the RPi does seem to be wired in a peculiar manner but I expect there is a good reason for that.
Gordon
Many thanks for your helpful reply; I can now stop worrying. I have, in fact, now been able to confirm that the composite video output is fine. The 4-way socket on the RPi does seem to be wired in a peculiar manner but I expect there is a good reason for that.
Gordon