CRT-TV Effect

[Ancalagon]

Does anybody know if there is any method to apply a "CRT-TV effect" to a video? The purpose of the effect is to make the output look like a video coming from a CRT TV ("teletube").

Here's a good comparison between a normal monitor and CRT TV output:
http://upload.wikimedia.org/wikipedia/commons/5/59/CGA_CompVsRGB_Text.png

I would like to apply the same kind of effect to my videos as you can see in the picture on the right.

My rough guess is that this sort of effect (or filter) cannot be found anywhere for VirtualDub or Avidemux because few people would need it.


Further suggestions and comments (please notice that I'm not particularly tech-savvy) :
I do not mean any old cathode ray tube television with a crappy screen quality but a decent CRT TV, which is PAL, not NTSC. Besides, I believe that I would not have to alter the output resolution because CRT TV's are analogue, and I do not know how to measure the analogue quality in the form of pixel density.


Additional information:
The only video processing utilities that I am familiar with are VirtualDub, Avidemux, Avisynth, DebugMode Wax, and Windows Movie Maker (both "Live" and version 2.6).

If the output is easiest to produce with the help of a real CRT TV, I still have a 30" Philips CRT TV which I bought in 2004. Moreover, I happen to have a nice gadget called CMP-Telview 2 which is a PC-to-TV converter (I used it to connect my old laptop to the Philips TV between 2004 & 2008)

http://www.sunelectronics.gr/index.php?SCREEN=products_detail&ProductID=20724
http://www.nedis.com/Show3D.php?ARTLID=1098942&vmode=3D


I can connect my laptop to the CRT TV with this gadget, but I don't know how to record the output from the TV. Furthermore, I don't know which one of these I should use to connect my laptop to the CRT TV so as to make the output as close to the normal CRT TV quality as possible:

RGB OUT
S-VIDEO OUT
VIDEO OUT
Y OUT
U/Cb OUT
V/Cr OUT

(Y OUT, U/Cb OUT & V/Cr OUT seem to be a part of RGB, red-green-blue)

These are the output connections that I have in the gadget! You can see them in the pictures as well (see the links above).

(Just to let you know, I have all the cables needed for using CMP Telview 2 in order to connect my laptop to the CRT TV...)

[guns1inger]

You could try using some of the de-ghosting filters in virtualdub, such as ghost or exorcist to actually create ghosting effects. You only need to offset by a pixel or two to get a good effect

[jagabo]

You could try something like:

ImageSource("CGA_CompVsRGB_Text.png")
Blur(0.5,0)
R=ShowRed().Crop(3,0,-0,-0).AddBorders(0,0,3,0).RGBAdjust(r=1.3)
G=ShowGreen()
B=ShowBlue().Crop(0,1,-2,-0).AddBorders(2,0,0,1).RGBAdjust(b=1.2)
MergeRGB(R,G,B)

Or a variation. Adding some noise might help too.

If you want to do it in hardware you'll need to use the s-video or composite output from the computer (or your VGA/composite scan converter) and record that with a video capture device. Or maybe a DVD recorder.

[Ancalagon]

You could try something like:

ImageSource("CGA_CompVsRGB_Text.png")
Blur(0.5,0)
R=ShowRed().Crop(3,0,-0,-0).AddBorders(0,0,3,0).RGBAdjust(r=1.3)
G=ShowGreen()
B=ShowBlue().Crop(0,1,-2,-0).AddBorders(2,0,0,1).RGBAdjust(b=1.2)
MergeRGB(R,G,B)

Or a variation. Adding some noise might help too.

If you want to do it in hardware you'll need to use the s-video or composite output from the computer (or your VGA/composite scan converter) and record that with a video capture device. Or maybe a DVD recorder.

@jagabo

Your method seems to work very well! Thanks!

I saved the text as an .avs file (Avisynth script), loaded it in VirtualDub and voilá! The result is just like any video from a normal CRT TV. (I guess that most people could not tell the difference between the result of that script and any output recorded directly from a CRT TV.) Perhaps the main difference is the lack of any sort of flicker but I think I don't need it.