Video Blending
When creating video, Turbo Play can blend your tracks in various ways. Video information is written by parts that export video (Animation, Image, Video, Text, Visualization) and all audio parts that have
Visualization enabled.
When there is only one active track, either because you only have one track or other tracks are muted or disabled by a
Track selection marker, there is no blending.
When you have more than one track but the blending mode is "Direct Blend", there is no blending. Tracks are drawn one on top of the other in the order they appear on the sequence. This is the fastest mode for simple blending scenarios, for example, a video and some subitles over it.
When you have more than one track and the blending mode is not "Direct Blend", Turbo Play blends the tracks with Direct2D with either the Blend effect or the Composite effect. For more on these two effects, click
here and
here.
Blending options for a track include, except the blending mode, the opacity and a destination rectangle. Using e.g. 0,0,0.5,0.5 for destination rectangle allows you to render a track to upper left quarter of the display.