I found those methods still yield better overall output when your final goal is upscale.
For me (my videos), this one provides the best overall quality
the problem is not that TVAI de-interlace good/bad, they use ffmpeg Bwdif which is reasonable de-interlacing method all most in par with “Decomb” (i did an extensive de-interlacing compare between few types of de-interlacing methods on few SD vids, few days ago, was interesting finding) , but for some reason their de-int + upscale is not the greatest combination in one pass.
I think @ForSerious found that those settings (posted below) are best for him, you might also want to give it a shot.
I am still testing his settings prior to upscaling compared to mines to see who generates the best quality at the end of the upscale for my use cases.
The default preset is “Slower” . Don’t be obsessed with using the slowest settings, the differences can be very small for a huge increase in time. In particular HD material benefits less from extreme settings. HD is 6-8 times as slow as SD. Quote / Reference: http://avisynth.nl/index.php/QTGMC
