Re: 24 fps
> No content is interlaced at source (film is not interlaced, contrary to what you imply by mentioning de-interlacing it). The whole interlacing issue only arises when recording from broadcast TV source. If it's analogue, the definition will typically be poor by today's standards anyway. If it's digital and the broadcaster is using interlaced format to squeeze more bandwidth out of their cable network, they are almost certainly also over-compressing the video to the point where it looks horribly blocky anyway.
Many (all?) European broadcasters doing live events come straight out of the back of the camera in 1080i, keeping it interlaced throughout the entire broadcast chain, and long before there's any compression done.