Den 05.06.2023 20:51, skrev Andrew Randrianasulu:

пн, 5 июн. 2023 г., 20:23 Andrew Randrianasulu <>:

    пн, 5 июн. 2023 г., 20:18 Terje J. Hanssen <>:

        Den 05.06.2023 16:14, skrev Andrew Randrianasulu:

        пн, 5 июн. 2023 г., 15:34 Andrew Randrianasulu

            пн, 5 июн. 2023 г., 15:31 Terje J. Hanssen

                Den 04.06.2023 21:58, skrev Andrew Randrianasulu:

                вс, 4 июн. 2023 г., 15:07 Terje J. Hanssen

                    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
        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

        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.
        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


                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

                and is also included in Ruh's dvd guid sec. 3.4

                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!

Cin mailing list

Reply via email to