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Joseph Wu's frame grabbing software

This particular piece of software was written to be FAST. It does not have frame averaging capabilities, it simply grabs one frame, the instant you click on a mouse button.

To run this you must switch to /imager/white/jwu/VLI and type:

./get [filename] [start-frame].

You may want to create a symbolic link to this executable so that the file name you have to use doesn't have to have the full path name to the directory you want to write it to. Each time a frame is grabbed the current frame number, starting with the start-frame, is tacked on to the filename you specify. After each grab (get?) the current frame will be incremented.

Basic Functions

Left Mouse button: grab current frame.

Right Mouse button: bring up application menu.

Note: this can be done anywhere in the program's window.

How it works

Each time you click the left mouse button a new frame is grabbed to memory. To write all of these files out to disk click on the right mouse button and choose the 'Write Frames' option in the pop up menu.

There are several other options that one can use on the pop up menu, since they are all fairly self explanatory I will not explain all of them here.

Zoom

Fixed: This keeps the size of the image fixed when you resize the window. Get grabs everything in the window, i.e. it also grabs the black border.
Variable: This makes the image fill the window not matter how you resize it, i.e. the image is distorted by resizing the window.
Aspect: This forces the shape of the video screen to be maintained (the aspect) when the window is resized. The allows the image to be resized but not be distorted in the process.

Report

Off: This option turns the report function off.
FPS: This option displays the frames per second in the window with the video.
FPS & Zoom: This option displays both the frames per second and the zoom in the window with the video.

NOTE: If these is text in the window it too will be grabbed. In order not to grab any text, report should be turned off.

This file was last updated Jan 5, 1994 by Marcello Lioy