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MrMax

pixelchecksum

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MrMax

Trying to use pixelchecksum to check if something is happening in Adobe Premiere.

Problem is that minute changes are screwing the entire thing up, since its a video I am editing there are always fluctuations in the pixels.

My question is:

How is pixelchecksum calculated and are there different values for different colours?

From what I can tell, the larger the area to be scanned is the larger the checksum becomes.

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Melba23

MrMax,

I would not recommend using PixelCheckSum on a video for the very reason you state - too sensitive to minor colour variations. As the function is in the core code you would have to ask a Dev for details, but my understanding is that the result is some form of addition of the pixel colour values within the area scanned. :)

I once wrote this UDF to return the average colour of an area - you might want to try it and see if you can use it instead of PixelCheckSum. It returns a 6-char string with the RGB hex values of the average colour - perhaps you could look for a major change in one of these values to trigger your code, while ignoring any minor changes that were within a certain percentage of the initial value. :huh:

But why not give it a try - and by all means ask again if you need any assistance in getting it to work. :)

M23


Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind._______My UDFs:

Spoiler

ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area

 

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