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
Wow, this one is nearly 300 pages when saved as pdf (yay for firefox mobile devs for re-including 'save as pdf' in mobile ff too!)
According to this page, some cameras used 1-254 digital levels, as opposed to 16-235 ...
===
IEC 61966-2-4 standard is based upon the older ITU-R BT.709-5 standard and encompases a range of colors that is approximately 1.8 times greater than the older standard, essentially including the full gamut of colors that can be understood by the human visual system. Instead of 8-bit color representation being limited to a range of values extending from 16 (black) to 235 (white), a value range of 1 through 254 is used. Values of 0 and 255 don't carry color information, as they are used for synchronization purposes. The HDMI 1.3 specification includes support for the IEC 61966-2-4 standard, and Sony now offers HDTVs that can display 61966-2-4 color. The Sony BDP-S1 BD (Blu-ray Disc) player also supports IEC 61966-2-4 color.
====
so this battle for wider color was already on for quite some time!