Deinterlacing of overlaid titles only

[Serg Belyansky]

Well, here is the problem. I have a film sourced PAL DVD, progressively transferred. The DVD have ingrained subtitles with "fadein-fadeout" effect, and those fades are interlaced. The suibtitles are overlaid with transparent background.

Can you recommend a deinterlacer which will deinterlace those fades only, sparing all other parts of the frame?

[scharfis_brain]

you could separate the video into 5 parts usinf crop.


+----------------+
| Top |
+----+-----+-----+
|Left| Mid |Right|
+----+-----+-----+
| Bottom |
+----------------+


then only deinterlace the mid - part with kerneldeint.

and finally stack the parts back together again.

using stackvertical and stackhorizontal.

be sure choosing the value for cropping being MOD 4 and covering the whole area subs can occur in.

[sh0dan]

Couldn't it just be split in a top and bottom part?

Also - if you feel lik experimenting, you could also try on deinterlacing the frames that are detected as combed - for instance:
cropheight = 400
top = crop(0, 0, 0, cropheight)
bottom = crop(0, cropheight, 0, 0)
b_deinterlaced = kerneldeint(bottom, 1)
new_bottom = conditionalfilter(bottom,b_deinterlaced, bottom,"IsCombed(bottom,7)", "=", "true", show=true)
stackvertical(top, new_bottom)

set "show=false" to hide the IsCombed values.