[Cin] DV to DVD rendering - questions and issues

[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 (?)


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