Long question short, does plex support interlaced video files and properly play them or does it deinterlace on the fly?
I have some raw 8mm analog ntsc tapes i captured interlaced then h264ed them as interlaced in mp4 container and also did a deinterlaced version.
The deinterlaced version plays far smoother on plex (tv with firestick 4k) than the interlaced version. It is a bit choppy. Should i stick with deinterlacing? I fear that deinterlacing takes away from the image quality.
There are practically no displays today anymore, which can handle interlaced content.
So at some point, your material is going to be de-interlaced anyway.
You can only make sure that the deinterlacing process is done with the best quality you can achieve.
When Plex is doing it on the fly, the frame rate is halved. e.g. 60 Hz interlaced will turn into 30 fps progressive scan.
If your process is able to produce 60 fps de-interlaced output, the results might be more pleasing.
On the other hand, even today there are still many player devices which cannot handle 60 fps progressive scan content.
You will have to experiment and then decide.
Is yadif the best deinterlacer to use? I see it in handbrake with a few options. The other one is comb.
Handbrake nowadays recommend to use the “Decomb” filter, instead of a de-interlace filter.
(But I don’t know if this allows the filtered video to use the full frame rate of the source file.)
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