Print Page - Filming a CPC monitor: eliminating flicker?

Title: Filming a CPC monitor: eliminating flicker?
Post by: duncan_bayne on 03:17, 29 January 13

Hi All,

I intend to create a selection of YouTube videos featuring my Amstrad CPC 464 with GT-65 green screen; I've already put a few recordings up, e.g.:

Sorcery (http://www.youtube.com/watch?v=2yswANPMayA#)

I was wondering if anyone knows a way of eliminating the annoying flicker on the monitor that shows up in the video? I imagine it's to do with a difference in scan rate between the monitor and the camera, but I've no idea how to solve it.

Yours,
Duncan Bayne

Title: Re: Filming a CPC monitor: eliminating flicker?
Post by: Gryzor on 10:42, 29 January 13

Yeah, that's the strobe effect indeed. What is the framerate of the GT anyway? I forget!

Anyhow, video processing programs can remove the filtering for you - I've seen it with Adobe's products, though there are obviously others. What you can easily do is turn off image stabilisation in your camera settings, if there is an option. Also, if you do get an fps setting, try playing with it, if there's a setting with a multiple of the monitor's refresh rate it should help greatly.

Title: Re: Filming a CPC monitor: eliminating flicker?
Post by: lynwen on 17:54, 29 January 13

Those ghost things are mighty fast! Not seen this game before

Title: Re: Filming a CPC monitor: eliminating flicker?
Post by: Gryzor on 15:54, 30 January 13

Quote from: lynwenThose ghost things are mighty fast! Not seen this game before

Check out Sorcery+ too, its sequel. At first it looks like Sorcery, but it gets impressive :)

Title: Re: Filming a CPC monitor: eliminating flicker?
Post by: IanS on 21:25, 30 January 13

Quote from: Gryzor on 10:42, 29 January 13
What is the framerate of the GT anyway? I forget!

Same as the colour monitor as it's set by the CPC, so normally 50Hz.

Title: Re: Filming a CPC monitor: eliminating flicker?
Post by: duncan_bayne on 03:52, 31 January 13

Thanks - I'll try fiddling with the camera rate first, and failing that, try post-processing the video. Pity YouTube doesn't do it automagically ...

Title: Re: Filming a CPC monitor: eliminating flicker?
Post by: Bryce on 09:36, 31 January 13

Connect the CPC to an LCD monitor, then you don't have that issue.

Bryce.

Title: Re: Filming a CPC monitor: eliminating flicker?
Post by: Gryzor on 10:47, 31 January 13

Well, then why not just run it in an emulator and capture the video?

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General Category => General Discussion - Introductions => Topic started by: duncan_bayne on 03:17, 29 January 13