so what is happening here?

[MrKool]

I have captured about 15-16 hours of video footage so far and have converted it to mp4 using virtualDUB and this is the first time i am seeing this issue. As you can see in the picture if i turn on deinterlace on it cuts this section of the video like it is showing it only does this at some portions of the video. I have turned off all other filters MSU, crop, resize and they dont make a difference only the deinterlacer does this. Any ideas? I have also tried diffrent deinterlacing methods yadif, bob and the other one yadif is the best but when ever the camera spans fast this happens. if i load other videos i have captured using the same setting it looks beautiful in virtualdub side by side.

[jagabo]

Your capture has some fields that are half of one field and half of another. You can usually verify this by comparing the previous and next fields -- you'll see that one half that field matches one, the other half matches the other. Many capture devices do this on occasion.

[MrKool]

here is a video clip showing what is actually happening.

[MrKool]

this is the lossless interlaced video i think my source camera might be dying

there is a line in the middle of the videos in all tapes it kinda goes away on slow video but if there is fast action going on it shows up

[lollo]

Post a sample of the raw capture if you need help

ok, you did it while I was writing

[lollo]

The fields themselves are bad inside the capture, is not a deinterlacing problem:

[MrKool]

Thanks lolol I posted another question in camera help as I think it is a source play back issue my camcorder might be dying after 29 years

[jagabo]

I was able to fix the existing video with AviSynth:

LWLibavVideoSource("Pakistan Camera (20230728-1744).avi") 

top = Crop(0,0,-0,288).AssumeTFF()
bot = Crop(0,289,-0,-0).AddBorders(0,0,0,1).AssumeTFF() # shift the lower half up by one scan line

StackVertical(top, bot)
QTGMC() # or some other deinterlacer

You still have other severe problems with random frames popping up here and there.

[jagabo]

And with a few manual commands the intermittent backward jumps can be repaired too.

[MrKool]

wow jagabo you guys on this forum are amazing having said that i got no clue how to use avisynth i downloaded but there is no gui and i am a GUI guy i even ran the video through neat plugin and it still didnt look anything like what you showed in yours.