Regarding deinterlacing. When using, for example, "dgbob" or "Kernel Deint.", the value input for "threshold", is a lower value more precise, or better, than a higher value? More specifically, is a higher or lower threshold value going to give better results?
Same question for different filters. "Threshold" in other fields, for example, "Luma Stabilizer" (reduce flickering)... for optimal results should a lower or higher threshold value be used? Generally speaking, I'm sure there are anomalies or outliers depending on the video being edited. :)
Lastly, does anyone have any recommendation(s) for best deinterlacer available on avidemux?
Thanks for reading & thanks in advance for any feedback. :)
WbD
Quote from: WeBeDazzling on August 09, 2024, 07:37:10 PMLastly, does anyone have any recommendation(s) for best deinterlacer available on avidemux?
VDPAU in frame-for-field mode (doubling the frame rate) on Linux with NVIDIA graphics card and proprietary drivers.
On all other operating systems, never used for processing anything other than Yadif.
I don't bother deinterlacing much, because I do not use interlaced media.
For Mp4 you could use Libavedec Deinterlacers. I would try also Decomb Telecide with No Strategy unless you also have 3:2 pulldown. The default settings are pretty good.
Field order: top
None but compute
Never
7.00
50.00
10.00
50.00
Turn blend on.
Some things to consider: Interlaced 640 x 480 is recorded with 0.9 rectangular pixel size. So you need to pull out the interlace before resizing the height to the correct 4:3. Ideally, you take the original 640 x 432 and remove the interlace then resize to 640 x 480, not the other way around. The most important part is using the blend to soften the edges.
Better solution would be to see if the original media is available in a non-interlaced copy.
Hope that helps.
Thank you @alexstorm! Same, I don't use deinterlace but when I was playing around with it on a video, for eg., this one,
deinterlace example (https://gofile.io/d/UJSLwo)
....there seemed to be better upscale results when I tinkered with deinterlace. Yet all the various deinterlace options are a bit much to the layperson.
* "Threshold", does a lower threshold or higher threshold value, when time is not an issue, create more optimal results?
Thanks for the tips @alexstorm :)
WeBe,
Finally found info on threshold.
https://ffmpeg.org/ffmpeg-filters.html#vaguedenoiser
===
threshold
The filtering strength. The higher, the more filtered the video will be. Hard thresholding can use a higher threshold than soft thresholding before the video looks overfiltered. Default value is 2.
===
Higher you go, apparently is softer. It probably doesn't take that much more processing time. The tech underneath of the interlacer, I believe, is with ffmpeg.
Hope that helps. Have fun with your deinterlacing.