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Unofficial VirtualDub Support Forums > VirtualDub Filters and Filter Development > Logo Filter And Transparent Logos


Posted by: JD56731 Feb 20 2003, 04:38 AM
I am wondering how can I make a transpernt logo?
If I must have a .bmp file how can I do this?
I thought this was not possible to do with this kind of file.
I know how to do it with a .gif file, but the other I have no clue.
I want to put some writing on my video, but I wish to have a transparent
background so there is not a big blackout area on the video.
The only other way I can see is putting the writting under the video.
I would like to have it over the top though. I have seen this done, so Can someone help with this issue?

Posted by: JD56731 Feb 28 2003, 07:47 AM
ok, well heres an update, and anyone can jump in if they have something
to contribute here.
I spoke to somone and they told me to that I didnt need an alpha
channel, and that I just needed to use a blue background for the image, and that v-dub would blend it automaticly.
Well I tried a blue back ground with yellow writing over it, and this did not work. I wound up with a blue box with the yellow writing on my video.
I must figure out how to make the background invisible and just see the writing.
Can Anyone Help??????????????

Posted by: Cerberus Feb 28 2003, 07:35 PM
ohmy.gif I dont use the logo filter thats in VDub i use another called LOGO 1.3 Beta 4 by Donald Graft. All you need to know is with this filter is the colour decimal code.
I use black as the background with white text so my R,G,B Code is 0,0,0. This will specify black to be the invis colour and then you select the level of alpha channel to be, this change how visable the logo is

Posted by: JD56731 Mar 1 2003, 12:26 AM
ok, I got this filter installed, but I can not figure out what I am doing wrong here.
I tired making an image with a black back gound like you said, and I tried to make one with a blue like the sample image.
In both cases, I can still see the background on my video.
This makes no sense to me.
I must be making the image incorrectly.
Cna anyone help me do this correctly?


Posted by: jcsston Mar 1 2003, 07:27 AM
In the Filter Settings for Logo by Donald Graft. You need to enter the color values under Transparent Color and check the Enable box.
Hope this helps smile.gif

Posted by: JD56731 Mar 1 2003, 08:23 PM
I got It Working!!!!!!!!!!!!!!!!
WOOOOHOOOOOOOOOOOOOOOOOOOO

Posted by: Cerberus Mar 2 2003, 12:21 AM
ohmy.gif You got it to Work...........................Rocking huh!!! when you get it to work biggrin.gif

Posted by: JD56731 Mar 2 2003, 02:34 AM
ok now I found a new problem sad.gif

Now that this thing is working, its making videos come out really poorly.
The image on the video and any thing on screen has a weird blocky or fuzzness around it. So if people walk into the scene this apears around them, as well as where I put my image.
Even the words that apear in the video that are part of the video and not something I added have this same thing.
Its made the encode verry poor to view.
On top of all that, I can't advance the video with out having the picture get stuck now in the encoded avi.
IS there an adjustment I can make that will fix this?

Posted by: JD56731 Mar 2 2003, 06:08 PM
heres an update.
I have found that the problem only happens when I select second pass
on the divix 5.0.2 codec.
IF I use 1st pass then the video comes out clean.
Why is that?

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