[MEncoder-users] rip dvd to mkv, ogm, mp4 script

[James Hastings-Trew]

Martin Matusiak wrote:
> And this one just seems like an anomaly from the rule.
>
> You make a distinction between film and video, could you explain that?
>   
Note that these are NTSC distinctions. PAL is different.

"Film" is material that was shot in camera, or digitally produced, to be 
played at 23.976 frames per second (the same rate movies are played at 
in a theatre). It is stored on the DVD with pulldown flags so that it 
can be displayed properly on an NTSC television at 59.94 fields per 
second. Basically, it is a series of progressive and interlaced frames 
that can be "inverse telecined" back to the original 23.976 progressive 
frames.

"Video" is material that was shot with a 59.94 fields per second video 
camera, or edited on equipment designed to work with video-rate 
material. Generally, for playback on a standard definition television, 
the interlaced nature of this material does not matter, but for the 
purposes of playback on progressive display devices (computers, hand 
held devices, hi-def television sets) this material is deinterlaced, 
either at the time of compression, or by the display device itself. Even 
in a de-interlaced state, this material is 29.97 frames per second.

PAL is either 25 progressive frames per second, or 50 fields per second. 
I have not found a way to detect if a PAL title is interlaced or not 
(using mplayer - I can certainly detect it with my eyes), so I generally 
just use the yadif filter in there to catch it in a "one size fits all" 
way of dealing with the material.