[Cin] dvdcreate and filempeg patches

Mon Jun 5 20:51:05 CEST 2023

пн, 5 июн. 2023 г., 20:23 Andrew Randrianasulu <randrianasulu at gmail.com>:

>
>
> пн, 5 июн. 2023 г., 20:18 Terje J. Hanssen <terjejhanssen at gmail.com>:
>
>>
>>
>> Den 05.06.2023 16:14, skrev 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:
>>>>
>>>>
>>>>
>>>> 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.
>>>
>>
>> I tried
>> ffmpeg -i dv01.dv -aspect 16:9 -vf crop=iw-0-0:ih-106-65:0:106 -f
>> yuv4mpegpipe -
>> that resulted in interlaced bff:
>> Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, bt470bg, bottom
>> first), 720x404 [SAR 101:135 DAR 4:3], 25 fps, 25 tbr, 1200k tbn
>>
>
> I think mpeg2enc part of full cmd line need their own tweaks relative to
> one you get from cingg, for progressive and aspect ratio corrected output
> .....
>
>
>
>> In comparision the ffmpeg command line I have used is:
>> ffmpeg  -i dv01.dv -f dvd -target pal-dvd -aspect 16:9 -vb 8000k -mbd rd
>> -trellis 1 -cmp 0 -subcmp 2 -vf crop=iw-0-0:ih-106-65:0:106
>> dvd-wide-dv01.mpg
>> which results in progressive and DAR 16:9, but still not so good edge
>> quality
>>
>
May be "progressive" here is error, and ffmpeg still encodes
interlaced-as-progressive, so VLC for example does not enable deinterlacer
at playback automatically?

Have you tried to add interlaced flags manually to ffmpeg's command line?

Did you also tried to force deinterlacer in VLC? (or may be xine).

I hope my next mail contain enough of filtering lines for you to try after
interlaced crop.

>> Stream #0:0[0x1bf]: Data: dvd_nav_packet
>>   Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, progressive),
>> 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn
>>     Side data:
>>       cpb: bitrate max/min/avg: 9000000/0/0 buffer size: 1835008
>> vbv_delay: N/A
>>   Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 448 kb/s
>> Unsupported codec with id 98312 for input stream 0
>>
>>
>>
>>
>>
>> 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.
>>
>>
>>
>> Yes, of interest if I knew how to put this into the ffmpeg command line
>> above, with reference to the blog:
>> *Bwdif (FFMPEG): *
>> *Good at reconstructing smooth lines and retaining overall image detail
>> with SD content, faster than QTGMC but not as good. *
>>
>> *QTGMC
>> <https://macilatthefront.blogspot.com/2021/01/deinterlacing-with-avisynth-and-qtgmc.html>:
>> Best retention of original image detail and handling of edge case
>> artifacts, *
>>
>>
>>>
>>> Can you clarify even with my patches AND deinterlacing checkbox set in
>>> dvd creation window and "use ffmpeg" unchecked you still get interlaced?
>>>
>>>
>>>
>> I can do it, when it is included with the next Cin apps.
>>
>>
>>>
>>>>
>>>> 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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