[MEncoder-users] Encoding to DVD: to deinterlace or not?

[James Hastings-Trew]

Rich Felker wrote:
> 720p over HDMI link can surely be 60 fps... If the original content is
> 60i 
No, because that would be counter productive. There are only 29.97(25) 
frames per second on any DVD. With interlaced material, each frame is 
composed of 2 fields, each separated by both space and time. On an NTSC 
DVD, each field has 240 lines of information. On a PAL DVD, each field 
has 288 lines of information. The odd fields are just a little bit 
lower, spatially than the even fields. If you were to take each field 
and send it as a full frame at 60 fps, it will have half the vertical 
resolution, stretched up to fit the screen which would look ugly. 
Because of the spatial differences between the fields, you would have 
annoying bobbing artifacts. It is not a solution that any DVD player or 
TV set uses that I am aware of.