[Cin] dvdcreate and filempeg patches

[Andrew Randrianasulu]

пн, 5 июн. 2023 г., 17:14 Andrew Randrianasulu <randrianasulu at gmail.com>:

>
>
> пн, 5 июн. 2023 г., 15:34 Andrew Randrianasulu <randrianasulu at gmail.com>:
>
>>
>>
>> пн, 5 июн. 2023 г., 15:31 Terje J. Hanssen <terjejhanssen at gmail.com>:
>>
>>>
>>>
>>> Den 04.06.2023 21:58, skrev Andrew Randrianasulu:
>>>
>>>
>>>
>>> вс, 4 июн. 2023 г., 15:07 Terje J. Hanssen <terjejhanssen at gmail.com>:
>>>
>>>>
>>>>
>>>> Den 31.05.2023 07:24, skrev Andrew Randrianasulu via Cin:
>>>> > I ......
>>>> >
>>>> > ===
>>>> >
>>>> > and mpeg2enc line looked like this
>>>> >
>>>> > FileMPEG::open_file: Running
>>>> > /dev/shm/cinelerra/cinelerra-5.1/bin//mpeg2enc -v 0  -b 8000 -q 1 -a 2
>>>> > -F 3 -H -c -I 1 -M 4 -z b -f 8 -g 15 -G 15 -R 0 -o
>>>> > '/dev/shm/tmp/dvd_20230531-081921/dvd.m2v'
>>>> >
>>>> >
>>>>
>>>> Is it possible to get the mpeg2enc command line to test it with a dv
>>>> input file directly outside Cinelerra?
>>>>
>>>
>>> try line like this?
>>>
>>> ffmpeg -i input.dv -f yuv4mpegpipe - \
>>>
>>>  |mpeg2enc {flags and output file as shown }
>>>
>>>
>>>
>>> Yes, this fixed the BFF issue, but still Interlaced and 4:3 format.
>>> Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, bt470bg, bottom
>>> first), 720x576 [SAR 16:15 DAR 4:3], 25 fps, 25 tbr, 1200k tbn
>>>
>>> What I want is to get and try Progressive and 16:9 wide format. By
>>> cropping 720x576 to 720x405, bottom 65 and top 106 (top) preserves the
>>> displayed timestam at bottom.
>>>
>>
>>
>> Then you should try ffmpeg's deinterlacing and cropping before passing it
>> to mpeg2enc.
>>
>
>
> http://macilatthefront.blogspot.com/2021/05/which-deinterlacing-algorithm-is-best.html?m=1
>
> talks about some algos on ffmpeg I never considered:
>
> Estdif / Bwdif
> TS. bwdif             V->V       Deinterlace the input image.
>  TSC estdif            V->V       Apply Edge Slope Tracing deinterlace.
>

this one page talks about znedi3 neural network deinterlacer (need
vapoursynth and nerves to debug, apparently)

http://wp.xin.at/archives/5287

mentions bwdif line like this:

-vf bwdif=”mode=send_field:deint=all:parity=bff”

next forum recommend

https://forum.mrmc.tv/viewtopic.php?t=1615

"Whenever I do any off-line deinterlacing in ffmpeg I use the video filter
"w3fdif=complex:all" these days."

And shotcut users found sometimes  even "pp" subfilter may work.

https://forum.shotcut.org/t/technical-discussion-interlacing-revisited/8311

Note, I might be not fan of adding deint permanently exactly because field
still not reached absolute maximum quality. What if you want to re-visit in
5 years with new state of art deinterlacing algo? I hope sources will still
be around ....




>
>
>>
>> Can you clarify even with my patches AND deinterlacing checkbox set in
>> dvd creation window and "use ffmpeg" unchecked you still get interlaced?
>>
>>
>>
>>
>>>
>>> quite amazing ffmpeg in this most basic case still works after nearly 20
>>> years, line stolen (and modified)  from
>>>
>>> https://avva.livejournal.com/1188593.html
>>>
>>>
>>> Creating DVD with typical ffmpeg decoding to raw video piped to mpeg2enc
>>> for encoding has been the usual way as described in the Cin-CV manual
>>> http://cinelerra-cv.wikidot.com/cincv-manual-en:rendering-files#11
>>>
>>> and is also included in Ruh's dvd guid sec. 3.4
>>> https://www.qsl.net/n1gg/linux/video/linuxdvdguide.html#3
>>>
>>> mpeg2enc is said to give some higher quality at high bitrate that ffmpeg.
>>> The drawback is it is slow and audio and to be added and multiplexed
>>>
>>>
>>> For ffmpeg as I said cingg does NOT  use command line ffmpeg, so you
>>> need to modify profile parameters in dvd.dvd file.
>>>
>>>
>>> And preferably also a corresponding ffmpeg command line.
>>>>
>>>> I had already created a .mpg video file, interlaced and bff, and it was
>>>> no better, so I think deinterlaced (progressive) will be best.
>>>>
>>>
>>> your call!
>>>
>>> Happy coding!
>>>
>>>>
>>>>
>>>>
>>>>
>>>
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