Why is same rate interlaced footage visually interlaced?

[LaserBones]

Same rate interlaced footage looks visually interlaced. Why doesn't it appear as progressive frames? I've attached a clip as an example of what I mean. If I double the framerate when deinterlacing there are some slight shifts but each frame is 98% the same. Why is some footage like this? If I use QTGMC() followed by SelectEven() is that the proper way to deinterlace this? Should I use a same rate deinterlacer?

[Alwyn]

I've attached a clip as an example of what I mean.

Nothing attached here, LB.

[LaserBones]

I've attached a clip as an example of what I mean.

Nothing attached here, LB.

Sorry! Here it is.

[Sharc]

Same rate interlaced footage looks visually interlaced.

Of course when you watch it on a progressive monitor (PC, TV) without prior deinterlacing. You see both fields simultaneously which show up as scanlines in motion scenes.

Corrected:
It is not true interlaced, so there's nothing to deinterlace. The video is phase shifted progressive video. One has to match the fields to restore the progressive frames. It can be done in Avisynth or Virtual Dub.

[Alwyn]

This look OK to me:

TFM()
TDecimate()

[Sharc]

This look OK to me:

TFM()
TDecimate()

No, but thanks. It's actually phase shifted progressive video. There is nothing to decimate, just match the fields. TFM() only.
(I will correct my post #4 accordingly)

[Alwyn]

One has to match the fields to restore the progressive frames. It can be done in ... or Virtual Dub.

How? Been looking for this for a while.

[Sharc]

One has to match the fields to restore the progressive frames. It can be done in ... or Virtual Dub.

How? Been looking for this for a while.

Don't know. Didn't try long. Maybe several steps are needed, something like
- separating the fields
- deleting the first field
- re-weaving
There should be a better solution though......

Edit:
Based on above thoughts, here we go:

[Attachment 82100 - Click to enlarge]


Edit:
or use ffmpeg:

ffmpeg  -i "%~1" -vf fieldmatch=order=tff:mode=pc -c:a copy -c:v libx264 -preset medium -crf 20 "%~1_matched.mp4"

[Sharc]

@Alwyn: I edited post#8 for the Vdub solution. The filter is field delay.

[Alwyn]

Thanks Sharc.