Screen Recording Project - timelapsed

So, I would like to record a whole working week, or maybe more, of work at my computer, but how?

Well, first off I think I want it to be time-lapsed. I think I would like 1 working day compressed into 1 minute:

1 working day = 8.5 x 60 = 510 minutes = 30600 seconds
1 minute = 60 seconds = 60 x 24fps = 1440 frames
30600 / 1440 = 21.25 seconds between each frame

Well, Quicktime does come with screen recording capabilities, but these are a bit hefty on the old processor/ram/disk space.

What I will probably do is make an Automator workflow which takes a screenshot every 21 seconds. Here it is:

Automator workflow which takes a screenshot every 22 seconds

By default "Take a screenshot" saves a file in a location but calls it something. For the next screenshot it overwrites the first. I had to use variables to change this.

Firstly I got a location variable and this contained the folder to save it to. I then got the time variable. I then made a text variable and dragged both of these other variables in, with a "/" in between. I dragged this variable into  the "Save to:" box. It then saves it to the location folder, with the name of the time it was taken.

I think you also need the "Get Value of Variable" before so it updates the variable "time".

Each screenshot is about 1.7MB:

1.7MB x 1440 = 2448MB per day.

I converted this into a quicktime movie using MPEGStreamClip  and it made a 17MB file! (15fps). Sorted!

To anonymise reducing it by 1/3rd (600 x 400 px) seems to render the text unreadable!


After a while of running this I got slightly annoyed at the screencapture noise. To run it silently I figured changing the preferences for it would work. Nope. Next I found the plist file:
com.apple.screencapture

But firstly it didn't exist, and next I couldn't find full documentation of it! Just the simple stuff like file format and location.

The command line for it is:

screencapture -x filelocation/filename.png

So I modified the automator workflow to use this command line instead of the screencapture object. It took 5 mins to work out how to access the variables in Run Shell Script but here's how I did it:

Screencapture workflow with automator using command line argument and passing variable

To access variables I think the only way is to pass them into the run shell script. I found this helpful page on it

The main points were:

1. Make sure you ignore the inputs unless you really need them.
1. i.e. I only really needed the full path name and filename combined so this was only passed into the "Run Shell Script"
2. To use the passed variable you type:
1. "$@"
1. I don't think you need the speech marks but I needed them in the shell script

Now I'm thinking about it I don't think I need the workflow at all, could just run it using a simple shell script. But I think Automator is a nice way of introducing people to programming.

Making an Application which fixes all the little things

Fix Everything Please Application

A while ago I had the idea of making a little application which fixes any little problems we have in the college with the Apple Mac accounts. Part of the trouble is to do with the Active Directory accounts, but a lot of the trouble comes from Applications coming up with errors related to the preferences.

Basically, this program deletes preferences and folders to all the programs which cause the most problems.

I made the program in Automator, and it basically just runs a shell script with a lot of 'rm' for removing stuff. I originally tried using a lot of the options in the library to find certain files and put them in the trash. This doesn't work for different users though, as they have a different location for their home drive. So I ended up using the '~' option to specify the users home drive:

these three lines remove anything related to Adobe:

rm -R -f ~/Library/Application\ Support/Adobe/
rm -R -f ~/Library/Preferences/Adobe*
rm -R -f ~/Library/Preferences/com.adobe*

this removes the key Firefox preferences, which cause it to say "A copy of Firefox is already open"
rm -R -f ~/Library/Application\ Support/Firefox/

this removes any ScanWizard preferences
rm -R -f ~/Library/Preferences/com.microtek*
rm -R -f ~/Library/Preferences/Microtek\ Preferences/
rm -R -f ~/Library/Preferences/Microtek*
rm -R -f ~/Library/Preferences/ScanWizard*
rm -R -f ~/Documents/ScanMaker\ 8700/

this removes any HP Scanner preferences
rm -R -f ~/Library/Preferences/HP*
rm -R -f ~/Library/Preferences/com.hp*
rm -R -f ~/Library/Preferences/ScanExpert\ Folder/

This removes Nikon references for the Nikon browser
rm -R -f ~/Library/Preferences/Nikon/
rm -R -f ~/Library/Application\ Support/Nikon/

This removes the Network Home Relocation for the Caches folder and makes a new one

rm -R -f ~/Library/Caches

mkdir ~/Library/Caches

I added the -R so that it would force the removal, and the -f so it doesn't come up with an error if the file/folder doesn't exist.

Here's a screenshot of the workflow in Automator:

Automator workflow for "Fix Everything Please"

It proves very popular amongst the students and staff here, and I just add to the list when another program has this sort of problem. I just have to work out a quick way of deploying it to all the workstations, hopefully make a '.pkg' file and put it to the task server.