raspistill waiting

[makgab]

Hi!

If I run:

Code: Select all

~# raspistill -o test.png -e png -t 0

then it makes an image (~8MB) but wait 7-8 seconds. It is the time for making the image file?

[jamesh]

-t 0 means it should run forever without taking a picture, so I am not sure what is going on.

Do you have the latest camera software?

[ethanol100]

When requesting "-t 0" the "state->frameNextMethod" is set to "FRAME_NEXT_FOREVER" this has a hard coded sleep time of 10sec. Each ten seconds MMAL_PARAMETER_CAPTURE is set to 1.

If you want to take an image as fast as possible, you need to specify a value greater 0.
It will take a minimum of 3 seconds to record a full frame image and save it to PNG. But the timeout should not be set to a value lower than 500, else the auto exposure will not be able to adjust the parameters.

(My pull request https://github.com/raspberrypi/userland/pull/200 addresses an issue, that if -t 0 is set after the "-tl" option the value for the time lapse is ignored and each ten seconds an image is generated...)

[makgab]

Do you have the latest camera software?

Yes, latest. (Rapsbian-2014-09-09 image with updates)

[makgab]

When requesting "-t 0" the "state->frameNextMethod" is set to "FRAME_NEXT_FOREVER" this has a hard coded sleep time of 10sec. Each ten seconds MMAL_PARAMETER_CAPTURE is set to 1.

If you want to take an image as fast as possible, you need to specify a value greater 0.
It will take a minimum of 3 seconds to record a full frame image and save it to PNG. But the timeout should not be set to a value lower than 500, else the auto exposure will not be able to adjust the parameters.

So, I need to take an image. Do I need to use it with parameter "-t 1"?

[gordon77]

When requesting "-t 0" the "state->frameNextMethod" is set to "FRAME_NEXT_FOREVER" this has a hard coded sleep time of 10sec. Each ten seconds MMAL_PARAMETER_CAPTURE is set to 1.

If you want to take an image as fast as possible, you need to specify a value greater 0.
It will take a minimum of 3 seconds to record a full frame image and save it to PNG. But the timeout should not be set to a value lower than 500, else the auto exposure will not be able to adjust the parameters.

So, I need to take an image. Do I need to use it with parameter "-t 1"?

Normally a value > 500

[makgab]

Normally a value > 500

Do you mean "-t 600"? And parameter "-tl"?

[gordon77]

Normally a value > 500

Do you mean "-t 600"? And parameter "-tl"?

t sets the time the camera waits to take a picture, 500 is the minimum so 600 should work, tl is used for timelapses, see

http://www.raspberrypi-spy.co.uk/2013/0 ... pi-camera/