Kernel deinterlacer in ffdshow - fields question

[aabxx]

There is a checkbox called "swap fields" in the kernel deinterlacer included with ffdshow.

In the avisynth-version, field order is defined by 0 (bottom first) og 1 (top first)... how do these values correspond with "swap fields"? Ie. is swap fields checked equal to "0" or "1" in the avisynth-version?

[aabxx]

there are quite a few places where you can check "swap fields" in ffdshow... no-one knows what exactly is swapped from what?

[unskinnyboy]

Like the name implies, enabling that option will swap the fields of a frame. Use it if your video has a wrong field order (TFF vs. BFF).

P.S: Don't bump threads. Read the rules.

[neuron2]

The problem is that swap fields is NOT equivalent to just changing the field order. It also reverses the spatial orientation of lines pair-wise.

So, if you had a proper picture that is TFF, and you cropped one line from the top and added one to the bottom, it would still be a good picture but now BFF. But if you did swap fields, it would be BFF but all the lines would be in improper positions.

[aabxx]

Thx for the replies guys... but what I was wondering was...

My video is TFF.

If we assume I don't do any cropping and stuff, and just want to use the kernel deinterlacer included with ffdshow... should i check or not check the "swap fields" box?

[unskinnyboy]

No, you shouldn't check it. It will look ugly if you do (flickering). Try it to be satisfied though.