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raspberrypi / raspiraw

Example app directly receiving raw data from CSI2 sensors
BSD 3-Clause "New" or "Revised" License
259 stars 88 forks source link

Struggling to find information on how to adjust sensor exposure time to be able to take videos in only relatively light locations #63

Open AbrieJCronje opened 2 years ago

AbrieJCronje commented 2 years ago

This is a really cool tool, so firstly thanks to the maintainers.

I've gotten it to work and record at really high fps (>600fps), but all images are so dark that you can't see anything. I've read that this is to be expected, but even with my cellphone flashlight pointing right where the camera is looking you can only see edges sometimes.

For my use case, I want to take videos outside in daylight at around 200-300fps. I have read that you can change (increase) the sensor exposure time -eus, --expus : Set the sensor exposure time in micro seconds. to capture more light. But am having a tough time figuring out how to balance a desired fps (say 200) with a -eus value that can record video in broad daylight. I also can't find any information in the readme about this.

Any tips?

kyleboddy commented 2 years ago

What type of lens do you have? Is the aperture fully open and is it large enough to let in enough light for higher FPS rates? That's the first thing to analyze before tinkering with exposure and software fixes.