Research Time Lapse Photography

UTCSheffield / thelongwellwalk

"The Backpack of Awesome" Raspberry Pi based system for recording and transmitting data from a lone long distance walker. Being built for http://thelongwellwalk.org/

Apache License 2.0

3 stars 1 forks source link

Research Time Lapse Photography #2

Closed mr-eggleton closed 10 years ago

mr-eggleton commented 10 years ago

Find raspberry pi timelapse software python for preference every 90 seconds rasp pi camera How much data in 16 hours?

@EdwardA @10senderst @GeorgeLaver

EdwardA commented 10 years ago

some sources for reference https://docs.google.com/document/d/1gwvbEPPyH23qPsboBUx4ITTDbot_95pMiAX_-4o6oGc/edit?usp=sharing

mr-eggleton commented 10 years ago

I don’t appear to be able to get to that document on google docs (a permissions issue I think)

From: Edward [mailto:notifications@github.com] Sent: 20 November 2013 22:19 To: UTC-Sheffield/thelongwellwalk Cc: Martyn Eggleton Subject: Re: [thelongwellwalk] Research Time Lapse Photography (#2)

some sources for reference https://docs.google.com/document/d/1gwvbEPPyH23qPsboBUx4ITTDbot_95pMiAX_-4o6oGc/edit?usp=sharing

— Reply to this email directly or view it on GitHubhttps://github.com/UTC-Sheffield/thelongwellwalk/issues/2#issuecomment-28937272.

EdwardA commented 10 years ago

Sorry, thought I changed it. Whenever you click on the link now it should work, I have changed it.

mr-eggleton commented 10 years ago

good sources for pi camera time lapse (from Ed)

http://www.designspark.com/blog/time-lapse-photography-with-the-raspberry-pi-camera

https://www.tindie.com/products/tmhrtly/airpi-kit/

http://www.jiscdigitalmedia.ac.uk/guide/print-size-and-file-size-calculator

https://www.modmypi.com/raspberry-pi-camera-board

memory capacity calculations:

24_60_60= 86400 (1 day in seconds)

86400/90= 960 (total seconds / time between photos)

3.6960= 3456mb (size of photo \ total photos)

3456*7= 24192 (1 day of use times by 1 week)

24192/1024= 23.625 (1 week use in gb) This is running 24 hours a day

EdwardA commented 10 years ago

--Corrections-- still photos actually have a Resolution of: 2592 x 1944 (not the 1920 by 1080 that is for moving images) 86400/90= 960 (total seconds / time between photos) 8.8_960= 8448mb (size of photo * total photos) 8448_7= 59136 (1 day of use times by 1 week) 59136/1024= 57.75 (1 week use in gb) running for 24 hours a day approx. 35GB for 16 hours use)

mr-eggleton commented 10 years ago

Python library for working with the camera http://picamera.readthedocs.org/en/release-0.7/recipes1.html

10penab commented 10 years ago

Can be used to set up the camera. http://thepihut.com/pages/how-to-install-the-raspberry-pi-camera

10senderst commented 10 years ago

We will need a solid state hard drive with the minimum of 100GB with the smallest power output.

1leyon-fordj commented 10 years ago

Chromebooks have an SSD

From: Tom Senders notifications@github.com Sent: 10 December 2013 16:58 To: UTC-Sheffield/thelongwellwalk Subject: Re: [thelongwellwalk] Research Time Lapse Photography (#2)

We will need a solid state hard drive with the minimum of 100GB with the smallest power output.

Reply to this email directly or view it on GitHubhttps://github.com/UTC-Sheffield/thelongwellwalk/issues/2#issuecomment-30245801.

10senderst commented 10 years ago

Whats the power output of that and how much space dose it have?

10crapperg commented 10 years ago

Does this work for responding to issues

Sent from my iPad

On 17 Dec 2013, at 16:16, "Tom Senders" notifications@github.com wrote:

Whats the power output of that and how much space dose it have?

\ Reply to this email directly or view it on GitHub.

stretchyboy commented 10 years ago

New technique for taking still and video at same time (need to upgrade to version 0.8) http://picamera.readthedocs.org/en/release-0.8/recipes2.html#capturing-images-whilst-recording

stretchyboy commented 10 years ago

New technique for splitting video file whilst recording (need to upgrade to version 0.8) http://picamera.readthedocs.org/en/release-0.8/api.html#picamera.PiCamera.split_recording

Could that mean we change to a continuous record method so we are always recording but then throwing away if nothing interesting happened?

Possible techniques:-

Every minute (or 5) we check if the button is selected for video mode. if it is keep recording on current file (do nothing), if not start a new one with the current time stamp "split_recording(output)" and add the last file to a list to delete later (can't do it straight away as the split is not instantaneous.
Every minute we split the video and also store when anything interesting happened (from the record button) a little while later we discard minute long files when nothing interesting happened (possibly keeping 5 minutes before and a few after each button press).

10penab commented 10 years ago

Everyone voted in the Thursday group, the result was, we have decided to go with the second option.