[Cin] dvdcreate and filempeg patches
Terje J. Hanssen
terjejhanssen at gmail.com
Tue Jun 6 15:54:08 CEST 2023
Den 05.06.2023 20:51, skrev Andrew Randrianasulu:
>
>
> 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 .....
>
Here were a lot to sort out:
The dvd-wide-ffmpeg+mpeg2enc.m2v from here is also scaled or streched
too high in vertical direction.
VLC deinterlaced on playback (keyboard D) on interlaced m2v gives
better quality.
>
>
> 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:
> 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?
VLC Deinterlaced ON playback of Progressive dvd-wide-dv01.mpg results
in more coarced jagged or saw-toothed round edges
>
> Have you tried to add interlaced flags manually to ffmpeg's command line?
-flags +ilme+ildct gives interlaced bff
>
>
> 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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