XML to descirbe a video composed of video clips, sound clips, and HTML -- sequentially and overlaid.
NB: Overlays are acheived by having multiple items in a sequence have the same start value, optionally setting the blend, width, height, top, left positions.
Project: contains a sequence. Sets global output options.
Sequnce: a series of items in chronoligcal order; all items have to be in a sequence. Any item can contain any other item.
- sequence
- video
- sound
- html
All have properties as below: If not specified, they inherit the parent properties. If no ancestor has a particular attribute, it defaults to the subject's full duration,
- start: milliseconds by which to delay the start, relative to parent; defaults to 0, ie synced with the parent
- duration: set to clip this and all children if any duration exceeds this figure. If not set, renders the whole file and any children.
- Cards render for the specified number of milliseconds, or so long as their parent is rendering.
- width: see
height - height: a percentage or pixel value to specify the dimension of the item
- top: see
left - left: a percentage or pixel value to specify the position of the item
- alpha: alpha value of the media as a float between 0-1.
- blend: blending mode for composition operation, defaults to
none.