Dealing with interlaced video.

Digitizing old video sources (stuff made in the 20th century) is a hassle for multiple reasons. Probably the biggest is that old video was stored in an interlaced format. This Wikipedia article digs into the details about interlaced video, but the short version is interlaced video is captured and stored as half-frames instead of full frames, and combining those half-frames for playback on modern displays (which are almost all progressive instead of interlaced ) can get messy. This is true for material that originated as video, and it’s also true of material that originated as motion picture film. The film-to-interlaced-video process often involved a hack known as three-two pulldown . That hack was necessary because of differences between motion picture film frame rates and video frame rates. Adding to the hassle of dealing with old video material is the fact that modern video editing software (stuff like Adobe Photoshop and DaVinci Resolve) just “fixes” the interlacing behind the...