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  1. hello guys good afternoon, a favor if I want to create a 1080i from this video 4k (60 FPS), but be really a 1080i at 29.970, how could I create it in avisynth someone will have some example please, first time I try this. The point is to use the output file to create a real 1080i bluray.
    Is interpolation necessary?

    thanks for your help

    this is the original source :

    Code:
    Vídeo
    ID                                       : 1
    Format                                   : AVC
    Format/Info                              : Advanced Video Codec
    Format profile                           : Main@L5.2
    Format settings                          : CABAC / 3 Ref Frames
    Format settings, CABAC                   : Sí
    Format settings, RefFrames               : 3 fotogramas
    Codec ID                                 : avc1
    Codec ID/Info                            : Advanced Video Coding
    Duration                                 : 3 h 9 min
    Source duration                          : 3 h 9 min
    Bit rate mode                            : Variable
    Bit rate                                 : 35,0 Mb/s
    Width                                    : 3 840 píxeles
    Height                                   : 2 160 píxeles
    Display aspect ratio                     : 16:9
    Frame rate mode                          : Variable
    Frame rate                               : 59,940 (59940/1000) FPS
    Minimum frame rate                       : 59,940 FPS
    Maximum frame rate                       : 60,000 FPS
    Original frame rate                      : 59,940 (60000/1001) FPS
    Standard                                 : NTSC
    Color space                              : YUV
    Chroma subsampling                       : 4:2:0
    Bit depth                                : 8 bits
    Scan type                                : Progresivo
    Bits/(Pixel*Frame)                       : 0.070
    Stream size                              : 46,2 GiB (99%)
    Source stream size                       : 46,2 GiB (99%)
    Encoded date                             : UTC 2017-11-09 13:42:29
    Tagged date                              : UTC 2017-11-09 13:53:24
    Color range                              : Limited
    Color primaries                          : BT.709
    Transfer characteristics                 : BT.709
    Matrix coefficients                      : BT.709
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  2. Member
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    Should be quite straightforward... ???Resize (not too sharp) to 1080p; AssumeFrameBased; AssumeTFF; SeparateFields; SelectEvery(4, 0, 3); Weave. Possibly AssumeFPS(30000,1001): I believe Select does not reduce the frame rate. Encode interlaced (TFF).

    The only point where I am not really sure is if the new fields should slightly bob by half a line height.
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  3. Member
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    Spline36Resize(1920,1080)
    AssumeTFF()
    SeparateFields()
    SelectEvery(4,0,3)
    Weave()
    AssumeFPS("NTSC_video")
    - My sister Ann's brother
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  4. It would be interesting how it is going to be comparable to HD 60p to DVD, because a certain degree of low pass was needed in that case, or special resize, or both. To avoid horizontal line flickering in the footage.
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  5. Originally Posted by LMotlow View Post
    Spline36Resize(1920,1080)
    AssumeTFF()
    SeparateFields()
    SelectEvery(4,0,3)
    Weave()
    AssumeFPS("NTSC_video")
    I took a screenshot, maybe you can confirm if it would work, in the image has the info

    thanks so much

    https://forum.videohelp.com/images/imgfiles/RTRbOwq.jpg

    by chance you will have at hand some method to do the inverse but in a real way with interpolation, etc.

    let say to go from 23.976 or 29.970 = 60 FPS, so that it has greater fluidity, starting from a DVD NTSC or PAL for example to perform an upscale.

    I tried a lot of scripts that are on the net, interframe, etc. but nothing really looks good... do you know any effective methods?
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  6. Of course it will work. Just be sure to encode it interlaced, top field first.
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  7. Originally Posted by jagabo View Post
    Of course it will work. Just be sure to encode it interlaced, top field first.
    where I can encode it like this? I thought I'd put it in the virtualdub or simple x264 launcher,

    How does the final script look, please?, and with which program I encode it.

    thanks so much
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  8. You need to add a source filter to the start of the script. If your source is mp4 try LSmashVideoSource(). Otherwise try LWlibavVideoSource(). Both are part of the LSMash plugin for AviSynth.

    I use the x264 command line encoder where the option is "--tff" (for top field first video, --bff for bottom field first). I haven't used Simple x264 launcher -- I don't know if it supports interlaced encoding via the UI. But it appears to support custom encoding options. You probably want to enter --tff there.
    Last edited by jagabo; 10th Nov 2017 at 08:38.
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  9. Originally Posted by jagabo View Post
    You need to add a source filter to the start of the script. If your source is mp4 try LSmashVideoSource(). Otherwise try LWlibavVideoSource(). Both are part of the LSMash plugin for AviSynth.

    I use the x264 command line encoder where the option is "--fff" (for top field first video, --bff for bottom field first). I haven't used Simple x264 launcher -- I don't know if it supports interlaced encoding via the UI. But it appears to support custom encoding options. You probably want to enter --tff there.
    thanks so much for your help i ll try right now
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  10. Member
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    ^ correction: "--tff"

    VirtualDub-FilterMod supports x264 as internal encoder, and is able to output MP4. That could be a simple solution. Other advanced AviSynth based converters with technical focus and support for the x264 CLI encoder are StaxRip x64 and MeGUI.
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  11. My personal advice is - don't go over HP@L4.0 and force BD compatibility - even less capable HW decoders should work fine with such settings.
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  12. Originally Posted by LigH.de View Post
    ^ correction: "--tff"
    Fixed the typo.
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  13. Originally Posted by jagabo View Post
    Originally Posted by LigH.de View Post
    ^ correction: "--tff"
    Fixed the typo.

    Thanks so much
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