RGBVideo

The RGBVideo user interface has its standard place in menu opt 4. The upper half of the Group deals with video related options and the activating buttons. The lower part controls image sizing and control rulers.

Main time indicator, which is linked with the manag menu maintime. Choose start times for previewing here.

Start time of video-scene.

End time of video-scene.

Total number of frames to be written.

Only show value frames in preview mode. 1 means: all frames are shown.

Backward preview.

Forward preview.

Start video recording from start time to end time. A wait layer will pop up which indicates the progress in a % bar.

Caution: Moving the mouse inside the graphics window or overlapping windows destroy the images.

Save one single arbitrary sized image. The image may be displayed in segments if it does not fit to screen. Check the output files: sometimes there are errors like gray lines. Before drawing the image you have to select a region. A rectangle appears in the graphics window, pull the nodes to resize it.

The mouse buttons are described in the main message area.

left:

Drag the corner nodes and the edge middle nodes to move them. Click into the center to adjust the size with mouse movements. Click and drag somewhere else to move the frame.

The aspect ratio is constant. It is calculated from the image dimensions (the image pels are squares).

middle:

Cancel. The region values are reset to the previous state.

right:

Accept the region and create the file. The drawing process cannot be stopped by the user.

ESC:

Exit the region editor. The values are preserved.

SPACE:

Reset the region values to the previous state.

C-SPACE:

Reset the region to the default values.

The mouse has to stay inside the graphics window to accept clicks.

There is no antialising for single images because there is no size limit. You can write a single image with n*size and apply a scaling filter afterwards.

Antialiasing for video sequences. This option is a bit experimental and does not work properly on all machines. It is optimized to reduce flickering. n points on an ellipse around the real value are sampled.

Aspect ratio of the ellipse.

Weight of the extra pixel values in respect to the center value.

Distance between center and extra pixels. The unit is screen pixel distance.

Number of extra pixels. 0 means antialiasing is off. Good values are >4.

Enter the output file size in pixels. The default values are PAL resolution.

GL optimizes drawing patches by omitting partly seen ones at the border. Leave a safety border to reduce this effect if image segments are merged.

Writing files needs a lot of memory. The more space available the bigger the chunks the faster the program -- if it fits into real RAM and no swapping occurs. There is no C-function to get a proper value, enter the size of free memory here.

The default value is 5MB which should be available on most machines.