[Cin] dvdcreate and filempeg patches

[Terje J. Hanssen]

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

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

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!
>>
>>
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20230605/131b931e/attachment-0001.htm>