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22nd April 2018, 16:49 | #1 | Link |
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Is there a complete decimate function? bit depths, chroma subsampling ?
Is there a more complete decimation function that supports other bit depths, chroma subsampling somewhere?
vapoursynth's vdecimate is limited (missing some modes and functions of tdecimate) avisynth's tdecimate, decomb decimate work in 8bit YV12 or YUY2 only Or is there a way to calc the metrics on a YV12/YUY2 clip and apply to another clip in the native pixel format? Or I would like to request a tdecimate mod which supports other bit depths/sampling/pixel types |
22nd April 2018, 17:09 | #2 | Link |
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Use clip2 in vdecimate. Done. Maybe I should add other formats too some day...
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VapourSynth - proving that scripting languages and video processing isn't dead yet |
22nd April 2018, 20:22 | #5 | Link | |
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Quote:
The other being that some people will want some kind of cyclic decimation with the dropped frames evenly spaced out, some will want most similar frames dropped and some want enormous cycles. It's almost easier to dump the difference and scenechange metrics from vdecimate and calculating which frames to drop from that then. Use a bit of python scripting and get the best results on your source!
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VapourSynth - proving that scripting languages and video processing isn't dead yet |
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22nd April 2018, 20:27 | #6 | Link | |
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Quote:
But I'm curious and willing to learn Do you have any practical usage examples ? |
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23rd April 2018, 19:33 | #8 | Link |
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I guess it more or less does that. For some reason I've never really liked that 2 pass stuff.
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VapourSynth - proving that scripting languages and video processing isn't dead yet |
24th April 2018, 06:22 | #9 | Link |
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I've found out that for example with MacGyver NTSC DVDs, it's the only way to get at least close to a non-stuttering output. The telecine pattern is a bit random probably due to the editing made back in the 80s. A normal IVTC looks mostly fine but when you notice the incorrect dupes or frame drops, you cannot unsee it anymore.
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