deinterlace first or after filtering

[gavo]

Should you deinterlace first or after filtering. I useing before because I not sure what you do for filtering interlace, if it any differnece.

[theReal]

Deinterlace before filtering and resizing.
If you change the picture information before the deinterlacing, the deinterlacer cannot do its job anymore.

If you had any filters that worked only field-based you should use them before the deinterlacing, of course. I don't know any such filters, though...

[communist]

You could aswell SeparateFields then do you filtering then weave them back to interlaced frames.

[theReal]

You could aswell SeparateFields then do you filtering then weave them back to interlaced frames...but only of course if your desired destination video is interlaced (otherwise it would be a waste of time - cpu and yours ;) )

[gavo]

So deinterlace first? Then filter?

[theReal]

Yep :)