[MEncoder-users] 720p to 480i

[Loren Merritt]

On Fri, 25 Jan 2008, RC wrote:
> On Thu, 24 Jan 2008 20:58:13 -0800 Kevin Bailey wrote:
>
>> I need to convert a raw video file from 720p to 480i.
>
> Use tinterlace, and scale in interlaced-mode to get the proper
> dimentions.

Scale first in progressive mode, then tinterlace.

Vertical scaling of interlaced video (even with an interlace-aware scaler) 
always looks bad, because interlaced video is aliased, and aliased content 
can't be interpolated well. The only good way to vertically scale 
interlaced video is to deinterlace it first. And since in this case you 
start out with progressive content, you can skip the deinterlace step.

--Loren Merritt