[MPlayer-users] PAL interlacing

[D Richard Felker III]

On Fri, Jan 23, 2004 at 03:52:15AM +0300, Vladimir Mosgalin wrote:
> Can somebody please explain how PAL video is interlaced? I searched on
> this a little, but it seems that almost everyone is writing about 50fps
> video for the TV. I want to know, what is found on regular 25fps
> DVDs with every frame (or every second frame) interlaced?
> 
> Pattern in source film is (T1 B1) (T2 B2) (T3 B3) (T4 B4), speeded up to
> 25fps; how exactly 25 fps interlaced video is produced from it? Is there
> way to reverse it without deinterlacing?

Interlaced video is NOT produced from film. It comes from TV/video
cameras. There's no process to be "reversed"; this is just how it was
originally recorded.

Rich