. color, font, alpha, size, png, bold, italic, blink,
. ul, caps, sup(super/sub script), fixed, nudge.
Special characters are <, >, \, /, # (see manual).
+Tracer: Trace an outline of an object for a mask like operation.
Translate: Allows displacing, cropping and/or scaling video
horizontally/vertically.
Unsharp: Applies a traditional darkroom technique, unsharp
F_lut1d: Adjust colors using a 1D LUT.
F_lut3d: Apply a 3D LUT (look up table) to an input video.
F_lutrgb: Compute and apply a lookup table to the RGB input video.
-F_lutyuv: Combine and apply a lookup table to the YUV input video.
+F_lutyuv: Compute and apply a lookup table to the YUV input video.
F_mandelbrot: Render a Mandelbrot fractal.
F_mcdeint: Applies motion compensating deinterlacing.
F_mestimate: Generate motion vectors.