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13th January 2021, 18:22 | #22 | Link | |
Software Developer
Join Date: Jun 2005
Location: Last House on Slunk Street
Posts: 13,248
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QTGM evolved from TempGaussMC, originally created by Didée. It is "a motion-compensated bob deinterlacer, based on temporal gaussian blurring".
It is a highly complex Avisynth script, using all sorts of plug-ins. Most notably but not limited to MVTools2 (motion compensation), MaskTools v2 (masking), NNEDI3 (interpolation) as well as RemoveGrain (denoising). Quote:
NNEDI/2/3 and EEDI2/3 "only" are interpolators. Simply put, they take an image with only half the lines (one field) and interpolate the missing lines. That alone would not make good deinterlacer, but it is an important "ingredient" for implementing stuff like QTGMC. (Well, I think NEEDI3 alone would make a decent half-rate deinterlacer, but you do not want to use "pure" NEEDI3 for bobbing)
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19th January 2021, 21:59 | #23 | Link |
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Join Date: Nov 2004
Location: Poland
Posts: 2,843
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BWDIF is "based on yadif with the use of w3fdif and cubic interpolation algorithms".
Could we replace w3fdif/cubic part for nnedi3 (or this filter described below) to have less jagged lines? There is also very new deinterlacing filter in ffmpeg called estdif which is based on "Edge Slope+Tracing Deinterlacing Filter". It seems to be some new approach and results are quite good, but can still produces jagged lines for static parts of image (this is where yadif is good). For actual combing removal it works very well- smooth diagonals and speed is not crazy bad. Actually yadif could be bumped to yadifmod and then new interpolation filter. Could be best speed vs quality filter out there. Last edited by kolak; 20th January 2021 at 01:11. |
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