[Cin] DV to DVD rendering - questions and issues

[Pierre autourduglobe]

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/
> 
> 
> 
> 
>