Building on the robust program assembly support, RadiantGrid has developed an innovative batch-mode video editing engine, which enables multitrack assembly of media content.
Multitrack assembly supports multiple composited video tracks, which can use 32-bit alpha channels or opacity assignment. Each track can be sourced from a video or image asset, or be generated dynamically from a graphics or text-rendering engine. Assets can be assembled into multiple tracks at any point in time and duration – there is no requirement to have end-to-end assembly. These video tracks are assembled frame by frame, compositing the frames together based on their opacity parameters, and then the frames are transcoded into the appropriate output codec.
Video assets can be overlaid, within the same track, and mixed with effects such as cross dissolves, wipes, or transitions. Multiple video tracks can also be assembled into arrangements such as PIP (picture-in-picture), promo over credits, or mosaic.
This new transcoding engine supports multiple mono audio tracks, which can be sourced from any channel within one or more audio assets. The final assembly can contain, for example, tracks Lt and Rt from an English language audio asset and tracks Lt and Rt from a Spanish language audio asset, which get transcoded into a four-channel audio stream in the output file.