Details and Options

• OverlayVideo is also known as picture in picture.
• Video overlay is typically used to give a talking head together with a presentation, add logos and other graphics onto a video, or replace a background with another video.

• The background can be a video or an image.
• The overlays o_i can be any of the following:
• imagean Image or Graphics placed at the bottom-right corner videoa Video object placed at the bottom-right corner texta string or styled text expran arbitrary expression, rasterized at its normal display size Placed[expr,pos]an object placed at pos Placed[expr,{pos,opos}]places position opos in expr at position pos Placed[expr,{pos,Inherited}]uses specified position pos for opos fan arbitrary function generating any valid overlay
• The position pos in background or the position opos in overlay can be specified in the following ways:
• {x,y}absolute pixel offset from the bottom-left corner Scaled[{s_x,s_y}]scaled position from 0 to 1 across the object posfuncan arbitrary function returning a position {pos_x,pos_y}named positions Top, Bottom, Left, Right or Center
• Time intervals interval_i can be any of the following:
• {t₁,t₂}starting at t₁, ending at t₂ t₁starting at t₁, ending when overlay or background end
• OverlayVideo always gives a video with the same pixel size as background.
• By default, OverlayVideo places the new video under the "Video" directory in $WolframDocumentsDirectory.
• Options to control properties of the output video are:
• CompressionLevelAutomaticcompression level to use FrameRateAutomaticthe frame rate to use GeneratedAssetFormatAutomaticthe format of the result GeneratedAssetLocation$GeneratedAssetLocationthe location of the result OverwriteTargetFalsewhether to overwrite an existing file VideoEncodingAutomaticvideo encoding to use VideoTransparencyFalsewhether the output video should have a transparency channel
• Audio and subtitle tracks of all input video objects are copied over to the resulting video.