Video Filters

Slate (color bars)

Slate creates an NTSC style color bar pattern


 

De-interlace

Images captured from video footage will likely be interlaced. Interlace is the way images are stored as 2 even and odd planes (or fields) in a single image. This allows video systems to display 60 images per second with only 30 frames. But the side effect, if you look at individual frames of video, is that that images that contained movement appear to jitter on a TV monitor. This is because the two fields of the frame are actually being displayed one at a time, switching back and forth very quickly. The De-Interlace filter uses a vertical-only blur convolution to blend the two fields of the image together and removes the flicker. A plugin called Field pack is provided that provides much more sophisticated handling of interlace video. It also allows sequences of frames to be processed.


 

Reverse fields

As the name implies, this filter reverses the order of fields in an interlaced image.  There isn't a hard standard for what order video fields appear in, so sometimes it is necessary to reverse them to display them correctly.


 

Reduce flicker

Reduce flicker is similar to de-interlace filter, but does not remove as much high frequency detail.


 

Video lines

The video lines filter simulates the visible scan lines found on a television monitor.


Countdown



The countdown filter renders an NTSC color slate and animates a 10 second countdown, over 10 frames of animation. The filter will initialize the animation for you, so you don't have to create one.



Doggy FX



Doggy FX is a 3rd party plugin, and if installed, will show up in the video menu.



TV Pixels

TV pixels re-interprets you image to look as if it is being viewed on an old-fashioned cathode ray tube television set.


TV pixels zoomed 6 times.


Raster lines

The raster line filter makes you image look like a grayscale version of a TV scaneline image.






Shift RGB



The Shift RGB filter shifts pixels in each color channel by a given amount, which can be positive or negative.

Shift RGB can be used to simulate color aberration in bad video, or it can also correct it.

Occasionally, you may find an image that has been corrupted by loading it into a program that does not fully understand its format, and the pixels may have become shifted by a certain amount. This can be corrected with Shift RGB.





The Red, Green, and Blue channels shifted by 20, 0, and -20 pixels.


Repair Dropout

This filter can help repair dropout that has occurred on old-fashioned video tape. Video recorded on magnetic tape was susceptible to dropout, that manifested in horizontal lines, or sometimes rolling lines that appeared like white-noise.

If the dropout lines appear only on a few frames, it is easy to fix with the “Repair dropout” filter. It's assumed that you have loaded the video frames into memory as an animation, by either loading an image sequence, or an AVI. Now, simply select the area where the dropout appears using the rectangle selection tool, and select the Repair Dropout” filter. The area from the previous frame will now be used in that small selected area.