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  1. Member
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    Feb 2022
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    United Kingdom
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    Hi,

    I'm using VirtualDub2 to deinterlace a capture from a camcorder. I recorded the capture at the source resolution (720x576i) and framerate (50fps). All deinterlacing was disabled during recording in order to deinterlace in VirtualDub.

    The deinterlacing filter is working successfully, so I choose the "duplicate frame" option because I want to preserve the opposite field of information. It does work in splitting the fields into separate frames, but it does so twice. So I get two pairs of the same frames in a row, where I'm expecting one pair. Like a "1-2-1-2-3-4-3-4" kind of thing.

    What could be causing this? This is the only filter or setting I've made.
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  2. Originally Posted by The Pack Rat View Post
    I'm using VirtualDub2 to deinterlace a capture from a camcorder. I recorded the capture at the source resolution (720x576i) and framerate (50fps).
    It should be 25fps . 50fps will double the number of frames

    720x576i25 is 25 frame per second, or 50 fields per second
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  3. Member
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    Feb 2022
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    United Kingdom
    Search Comp PM
    I understand now, I chose the wrong framerate from the info, it said 25 and 50fps next to each other.

    I went with the higher framerate for safety, this is still quite new to me. Thanks for the patience.

    Would it be possible to lower the framerate as part of the processing order of a video before deinterlacing?
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  4. If your cap was ok, you should be able to use video=>frame rate=> process every other frame (decimate by 2)
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  5. Member
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    Feb 2022
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    I've found converting down to 25fps, then taking that file and deinterlacing is smoother.

    Thanks for all the help!
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