The best deinterlacing process I've used in the past is the QTGMC
script. The quality of the de-interlaced videos it produces can be quite
spectacular (it introduces virtually no visible artifacts) when pushed
to its maximum quality.
However, it is very complex to use and requires a very long computing time.
Apparently, it's possible to use it natively under linux through the
VapourSynth software, but I've never been able to find simple
instructions (within my limited line-of-code skills) for using it under
this software...
Every time I've used this script to deinterlace my DV NTSC or HDV video
edits, I've done it under Windows with Avisynth and the long list of
recommended plugins to integrate with VirtualDub.
It's therefore too cumbersome a process to be directly integrated into
Cinelerra-GG, but it can be a valuable intermediate step if you're
looking for maximum deinterlaced video quality.
Le 23-05-30 à 17 h 41, Terje J. Hanssen via Cin a écrit :
Den 30.05.2023 15:19, skrev Terje J. Hanssen:
Interlaced and/or Deinterlaced continued:
- I'll add a good reference and some old background threads:
What is deinterlacing? The best method to deinterlace movies
http://www.100fps.com/
[CinCV TNG] Deinterlacing or not?
https://lists.cinelerra-cv.org/pipermail/cinelerra/2016q2/004926.html
[CinCVS] Interlacing, DVD
https://www.mail-archive.com/cinelerra@skolelinux.no/msg06692.html
https://www.mail-archive.com/search?q=interlace&l=cinelerra%40skolelinux.no
https://www.mail-archive.com/search?q=deinterlace&l=cinelerra%40skolelinux.no
Den 30.05.2023 03:34, skrev Terje J. Hanssen:
Den 29.05.2023 22:47, skrev Phyllis Smith:
More feedback to add to Andrew's reply.
Using Deinterlace creates a dvd.mpg file only marginally larger
than without deinterlacing.
But the result is visually better than without deinterlacing, which
is awful jagged at camera movements zoom/pan, at least on my
2560x1440 res monitor using VLC.
I do not understand the above sentence. Which result is better?
with deinterlacing or without deinterlacing? So Progressive is
better? which makes more sense to me in this day and age. As far as
I read on the internet, DVDs can be either Progressive or Interlaced.
Leaving it dvd rendering interlaced is worst jagged; selecting
deinterlaced is better both with default mpeg2enc ("TFF, interlaced")
and optional FFMpeg (progressive). Some of the jagged edges and lines
is expected to be caused by the scaled up low vertical SD wide
resolution.
I didn't notice visible +/- chroma difference by selecting "use
yuv420p dvd deinterlace format"
I will try to compare with DeVeDe's deinterlace YADIF filter and two
pass rendering.
(DeVeDe's second FFMPEG deinterlace filter exited the dvd rendering.)
In comparision with Cin rendering, the DeVeDe dual pass with YADIF
deinterlacing did compress the movie_0.mpg more and it was verified as
progressive. All progressive dvd video qualities were visual comparable.
du -sh dvd-wide-*/*.mpg dvd-wide-*/*/movie*.mpg
598M dvd-wide-dv01_20230526-225332/dvd.mpg
598M dvd-wide-dv01-ffmpeg_20230527-000911/dvd.mpg
380M dvd-wide-dv01-dualpass-yadif/movies/movie_0.mpg
mediainfo dvd-wide-*/*.mpg dvd-wide-*/*/movie*.mpg | grep Scan
Scan type : Progressive
Scan type : Progressive
Scan type : Progressive
Regarding Dvd Interlaced Chroma:
Possibly PAL dv 4.2.0 is more pleasant for MPEG-2/DVD 4.2.0 than NTSC
dv 4:1:1 (?
Add also two references to the latter:
CinCV manual: Notes on mpeg video encoding (mpeg2enc)
http://cinelerra-cv.wikidot.com/cincv-manual-en:loading-saving#11
Frank's thougt on HDV: Comments on transcoding from DV25 to MPEG-2 for
DVD-Video
https://web.archive.org/web/20080125111318/http://www.humanvalues.net/hdv/#dv25
The latter is also a valuable recource to several, now legacy HDV
camcorders (my Sony HDR-FX7E included)
https://web.archive.org/web/20080125111318/http://www.humanvalues.net/hdv/
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