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+--- Thread: DeInterlace QTGMC-Bob strange frame issue (/thread-1096.html)
DeInterlace QTGMC-Bob strange frame issue - SupermanTV - 25.07.2019
Hi Selur, I'm new to Hybrid, quite liking it so far... (latest version 2019.06.09.2)
I'm having a strange issue when De-interlacing (QTGMC Bob) DV captured videos.
Doing ProRes, preset 'very slow', and 'order 2' for Lower field first..
After analyzing frame by frame, I noticed the following:
Every 'x' amount of frames, seems like it adds a 'prior' frame (so the video kind of rewinds momentarily before continuing)...
When I try it without the Bob option (29.97), instead of adding a 'prior' frame, it 'repeats' a frame, giving a momentary pause to the video.
Hopefully you can point me in the right direction as to a any settings I can adjust...
Thank you in advance.
Here's a link to both test videos (41 sec), as well as the original, and debug files:
(29.97) https://drive.google.com/file/d/1nif8-2mQlyviry_43eCRYtiBv8iBdH9h/view?usp=sharing
(59.94) https://drive.google.com/file/d/1sTVhzfaIRJXSkrKGAkiQ0KYh9Oa3PAwK/view?usp=sharing
(Source) https://drive.google.com/file/d/1_N2nKAqiCF2oh6E0pMKRQIZ68ZC1gJDD/view?usp=sharing
RE: DeInterlace QTGMC-Bob starnge frame issue - Selur - 26.07.2019
Had a quick look:
Try using QTGMC Bob in combination with (Other->Restore)sRestore with a target frame rate of 23.976 fps.
Seems to give the best results (tweaking the sRestore settings might offer some further improvement)
RE: DeInterlace QTGMC-Bob starnge frame issue - SupermanTV - 26.07.2019
Thank you for looking into this..
Indeed, your workaround yields a better result, though I feel funny about dropping frames/info...
I'll keep tweaking with sRestore then.
But still puzzled as to why that happens...
RE: DeInterlace QTGMC-Bob starnge frame issue - Selur - 26.07.2019
Quote:But still puzzled as to why that happens...The frame jumps seems to be related to QTGMC when using for example:
# Deinterlacing
clip = core.yadifmod.Yadifmod(clip=clip, edeint=core.nnedi3cl.NNEDI3CL(clip=clip,field=2), order=1, mode=1)the result looks 'okay', but with lots of ghosting in some scenes maybe additionally using sRestore might help,...
All in all I guess that the source was original telecined and then captured to interlaced or something similar,...
Cu Selur
RE: DeInterlace QTGMC-Bob starnge frame issue - SupermanTV - 26.07.2019
(26.07.2019, 17:56)Selur Wrote:Quote:But still puzzled as to why that happens...The frame jumps seems to be related to QTGMC when using for example:
(YadifMod, Mode=1, Order=1, Edint = NNEDI3CL, NNEDI mode 2)# Deinterlacing
clip = core.yadifmod.Yadifmod(clip=clip, edeint=core.nnedi3cl.NNEDI3CL(clip=clip,field=2), order=1, mode=1)
the result looks 'okay', but with lots of ghosting in some scenes maybe additionally using sRestore might help,...
All in all I guess that the source was original telecined and then captured to interlaced or something similar,...
Cu Selur
Good enough!!
As a side note, the original was VHS but it was captured through a DV camcorder...
Maybe something got altered in that process...
Again, thank you very much for your help!!
Randall
RE: DeInterlace QTGMC-Bob starnge frame issue - SupermanTV - 27.07.2019
(26.07.2019, 22:31)SupermanTV Wrote:(26.07.2019, 17:56)Selur Wrote:Quote:But still puzzled as to why that happens...The frame jumps seems to be related to QTGMC when using for example:
(YadifMod, Mode=1, Order=1, Edint = NNEDI3CL, NNEDI mode 2)# Deinterlacing
clip = core.yadifmod.Yadifmod(clip=clip, edeint=core.nnedi3cl.NNEDI3CL(clip=clip,field=2), order=1, mode=1)
the result looks 'okay', but with lots of ghosting in some scenes maybe additionally using sRestore might help,...
All in all I guess that the source was original telecined and then captured to interlaced or something similar,...
Cu Selur
Good enough!!
As a side note, the original was VHS but it was captured through a DV camcorder...
Maybe something got altered in that process...
Again, thank you very much for your help!!
Randall
An interesting observation:
- I tried QTGMC-Bob (Field Order 0) with x264/x265 mp4, and I get a very good output with NO frame jumping...
But I need ProRes for further editing...
RE: DeInterlace QTGMC-Bob strange frame issue - Selur - 28.07.2019
Output format should have no influence on the 'jumping' frames (doesn't here) only the filtering.
I use the Vapoursynth Preview to check whether there are such frames.
Seeing that half of the frames seem to be near duplicates I still would use sRestore (maybe with a target frame rate of 29.97).
Cu Selur
RE: DeInterlace QTGMC-Bob strange frame issue - SupermanTV - 28.07.2019
(28.07.2019, 08:10)Selur Wrote: Output format should have no influence on the 'jumping' frames (doesn't here) only the filtering.
I use the Vapoursynth Preview to check whether there are such frames.
Seeing that half of the frames seem to be near duplicates I still would use sRestore (maybe with a target frame rate of 29.97).
Cu Selur
Ok, I'll keep tweaking sRestore then..
Thank you!