Deinterlacing TV recordings or not?

[umbada]

Hello!

I have been recording sports events off DVB/IPTV for last decade. Now I have been trimming out different clips in order to make highlights compilation later. My question is whether I should deinterlace them (with AviSynth) before feeding them to video editing software (Davinci Resolve) or not?

There are two types of videos and I have attached them to this post:
1) 576i SDTV (2010-2018)
2) 1080i HDTV (since 2018)

[Selur]

I would always bob deinterlace interlaced content, before doing any further editing.
If interlaced output is needed I would (curse the reason that forces me to use interlacing and) just reeinterlace at the end of the filtering.

Cu Selur

[jagabo]

It depends on what you plan to do with the video and your final delivery format.

[umbada]

My final format would be:

576i -> 720p 16:9
1080i -> 1080p 16:9

All of them would be for later usage in Youtube, Facebook etc.

[jagabo]

Then your best option is to QTGMC() in AviSynth.

576i25 to 720p50
1080i25 to 1080p50

If QTGMC is too slow, Yadif(mode=1) is a faster but lower quality option.

[Alwyn]

Yadif(mode=1) is a faster but lower quality option.

What are your thoughts on the quality difference between AVISynth/Yadif verses Virtual Dub/Yadif 50fps (ie VD internal deinterlace filter)?

[jagabo]

Yadif(mode=1) is a faster but lower quality option.

What are your thoughts on the quality difference between AVISynth/Yadif verses Virtual Dub/Yadif 50fps (ie VD internal deinterlace filter)?

I haven't done any filtering in VirtualDub in many years. So I don't know if there's any significant difference between AviSynth Yadif and VirtualDub Yadif. I hardly use Yadif anyway. Just occasionally when I'm working on some other slow filters and want to speed up the processing. I'll usually switch to QTGMC for the final processing.

[Alwyn]

Thanks Jagabo.

[rrats]

bwdif is better than yadif

[jagabo]

Yes, bwdif is better than yadif and about the same speed. bwdif doesn't leave little "droppings" all over the picture.