I'm having a weird issue with my captures, where the colors look like they have incorrect field order, but the luminance channel is fine. Example - deinterlace a regular video with incorrect field order, though the problem will be on both Y & C.
Is there any way of fixing this through Avisynth? (I spent hours finding a script, but it only caused a headache).
And this has been an issue with 2 VCRs and 3 capture devices, I have no idea what causes it.
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A GIF is not a great way to show the problem because the video is converted from interlaced YUV to progressive RGB. Many errors can occur from that conversion. That's why it's important to have the original cap. Or use a program like AviDemux or VirtualDub to COPY (remux) a section of the video to a new file. In VirtualDub use Video -> Direct Stream Copy mode. In AviDemux set the video mode to COPY.
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You are right, the chroma has the opposite field order from the luma. I've never seen that before. Here's a fix:
Code:LWLibavVideoSource("Sample.mkv", cache=false, prefer_hw=2) AssumeTFF() SeparateFields() swapped = SelectEvery(2,1,0) # a video with the field order swapped MergeChroma(last, swapped) # use the original video for the luma, the swapped video for the chroma Weave() # weave the fields back into frames. QTGMC() # deinterlace for display
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Here's something a little simpler:
Code:LWLibavVideoSource("Sample.mkv", cache=false, prefer_hw=2) MergeChroma(AssumeTFF().SeparateFields(), AssumeBFF().SeparateFields()) Weave() QTGMC()
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