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YATTA, Yet Another Telecide Tool for Anime, is a tool used to IVTC video, usually anime.
It is used by a number of groups to achieve high quality MPEG-4 encodes of anime and other material. It enables the user to perform a series of video cleanup tasks, including but not limited to inverse telecine overriding, freeze frame assistance, and sectioned filter application.
The primary focus of YATTA is to perform IVTC (inverse telecine), which is the act of eliminating "combing" (so-called artificial interlacing) on the video source caused by the 3:2 pulldown process and lowering the frame rate to that of film. In YATTA's case, this is accomplished in two steps: by first aligning telecined fields back into full frames using a "current, current, next, next, current" (ccnnc) pattern, then "decimating" (removing) the duplicate frame left by the second "next" match. In addition to pure IVTC, YATTA also allows the combination of IVTC and traditional deinterlacing for sources mixing telecined and truly interlaced material, enabling variable frame rate manipulation to create VFR Matroska video files.
The secondary focus is on source improvements through a variety of means. The simplest involves freeze framing to replace bad frames, and moves into more intricate sectioned filtering.
External links
- YATTA Homepage - Tutorial and encoding guide
