[Cin] dvdcreate and filempeg patches

[Andrew Randrianasulu]

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:
>>
>>
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>> 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.



>
> 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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