Flicker

[cyclone5]

Hi

I recorded a presentation on my PAL DV video camera over the weekend. The presentation included a segment that was shown on a large plasma screen Television that was hooked up to a DVD player.

I have taken the DV footage off the camera, and watched it back on my PC. You can clearly read and see all the images and text on the plasma screen, but there is an annoying flicker. Obviously this is some digital feedback, but I would like to know if there is a filter for Virtualdub that will remove this.

Also, if the DVD source was NTSC/region one (I have strong reason to believe it was), could that have been what caused the flicker (remembering I recorded it using a PAL DV video camera)? If so, could I re-encode the video with an NTSC frame rate to eliminate the flicker?

[guns1inger]

Can you post a small section so we can see the flicker ? Otherwise you need to be more specific regarding exactly what you are seeing. There are many types of flicker, from interlace flicker (which you shouldn't get on a progressive display), field order problems, etc.

If I am reading this correctly, you have filmed the display with a digital camera, rather than feeding it in directly (through av cables). The image now has whatever flaws were broadcast embedded in it. Slowing the framerate down to NTSC won't have any effect. You would need to have the original footage to make any fixes like that.

In fact, it could well be the single frame per second difference between the NTSC broadcast and the PAL recording that has created this flicker. Either way, there is little you can do to fix it.

[cyclone5]

Can you post a small section so we can see the flicker ?

Here is a DivX of the part with the flicker:

http://homepage.ntlworld.com/p.bull/Robotech_Panel_London_Expo.avi

[Baldrick]

http://electronics.howstuffworks.com/question336.htm

But I haven't seen any filters for it.