Been experimenting a bit with Avisynth the past days, I've initiated a project where i will be digitizing all of my VHS-C tapes, i have enough time with Avisynth to the point where i can operate it and know a few settings and what they do and have so far been able to derive some what i would consider really good results. However i thought i would share my current settings on Avisynth where i use QTGMC for deinterlacing which has done a fantastic job so far, you will find the parameters below, if there is anything i should change, add or remove let me know, feel free to butcher it if needed, after all all i want is to optimize my results to the best of my capability with the equipment i have. Spite feeling satisfied i feel like i am potentially missing out on some great features there is just so much to choose from, so some advice from the experts would be nice.
Recording software used: Bandicam configured with Lagarith lossless, YUY2 (720, 576) 25fps PCM audio. Pal
Avisynth parameters: SetfilterMTMode ("QTGMC", 2)
QTGMC(preset="Slower", EdiThreads=2, SourceMatch=3, LossLess=2, Sharpness=1.0, TR0=2, TR1=2, TR2=3)
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Last edited by HansensUniverse; 19th Oct 2021 at 15:48.
Otherwise I think that a not lossles setting is more effective for pure deinterlaced output at double frame rate.
Interesting, i will try and change the parameters and do a few runs without, would be nice if i could save my self some processing time, it's worth mentioning that the playback deck i use is the Sony SLV D900 which has been an incredibly good reliable unit so far, i believe it's a mid range deck, i cannot find any details regarding an inbuilt TBC so i assume it doesn't have one but it's hard to believe otherwise because it manages to keep even the most worn tapes i have stable, never had more than 1 dropped frames, that was from a 31 min video, very happy with this deck and can recommend if anyone is looking for one for digitization without breaking the bank.
I prefer NOT do deinterlace my VHS captures. I process the grouped fields individually and don't alter the original interlaced structure. But that's perhaps just me ....
QTGMC is an excellent bobber, no doubt, but I got better results without it (even with lossless=2), especially for somewhat noisy VHS sources.
It is not just you, I do the same!
In general, I do not interlace for the final version too; I deinterlace lossless with nnedi3(field=-2) or QTGMC lossless just to apply the spatial/temporal filtering in a more effective way, and then interlace back. And I also keep HuffYUV file to watch, no loss compression with whatever codec!
However, for youtube videos I want to share with some friends, I deinterlace with QTGMC (not lossless), and then YT compresses to whatever it uses...
I got better results without it
But when the final result is double framerate and progressive, i guess it would be a very good choice
Last edited by emcodem; 23rd Oct 2021 at 07:25.