"Ghostly" movements in BT8x8 capturing

[SuperFresko]

Hello everybody!

I bought a BT8x8 card, I installed it on a new P IV system with W2K, Virtual Dub, BTWinCap drivers and Huffyu codec.

I connected the capture card to the VCR via composite and tried to capture some tapes.

Everything is ok, except for fast movements.

In the clip, fast movements have a "ghost" effect.

I tried to lower the resolution (from 720x576 to 352x288), but ghosts were still there.

During the capture, there are no dropped frames and the CPU load is never above 50%. The HDD is ATA-100, so there shouldn't be any speed issue.

I don't know what to do...

Has anybody any idea?

Thanks for your help.

Bye,
Massi.

[dilly]

Could be many things.

Are you deinterlacing? If you're using shipped software (like what comes with my Leadtek bt8x8) it may have a built in deinterlacer. If you read 100fps.com, you'll realize why deinterlacing isn't always the way to go, as you end up losing temporal resolution (= ghostly movements, instead of 60 images in a second it is 30 instead) - high motion is best kept in its original, interlaced form. SVCD, XviD, and DivX 5.03 (i believe) support interlaced video natively. If you're using a bob deinterlace filter (which increases the framerate by 2x) then you don't have to worry, you're keeping the proper temopral resolution.

It could also be the tape. Capturing VHS tapes can prove harder than you think, especially if an old/many times played/VCR recorded(not store bought) tape.

[SuperFresko]

Originally posted by dilly
Are you deinterlacing?

Nope. I set no filters during capture.

If you're using shipped software (like what comes with my Leadtek bt8x8) it may have a built in deinterlacer.

No. I'm using Virtual Dub. I capture with the following settings:

720x576 (PAL system) interlaced
25 fps
44.1 KHz PCM Stereo
Huffuy codec (YUY2)

That's it.

It could also be the tape. Capturing VHS tapes can prove harder than you think, especially if an old/many times played/VCR recorded(not store bought) tape.

Yeah... I'm starting to believe it... It seems that there is no ghost effect when I capture directly from TV (from VCR via composite cable, not using the capture card built in TV tuner), and it appears when I capture from VHS tape. And it seems that when it appears, it remains also on TV captures, as if it is "activated" and it cannot be turned off... I have to run some other tests...

Bye,
Massi.