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Clean-up a Video with VirtualDub and DeLogo

Clean-up a Video with VirtualDub and DeLogo By saby - Last updated on Saturday, January 14, 2012
18606 Views :: 7 Comments :: Article Rating (Total Votes: 15)
Category: Studio 1-15 Tutorials / General  -  Previous tutorials  -  Associated File(s)
Published on Sunday, January 25, 2009
Created on Monday, January 5, 2009 3:11 AM

Preamble :

Imagine that when viewing a video that is very important to you, you discover that you did not see the big "http://declic-video-fx.com" was stuck on the lens of your camera. It looked something like this :

Oh darn !

Don't panic, we have the solution. This tutorial will show you that by using VirtualDub and the DeLogo filter from Karel Suhajda you can remedy this unfortunate situation.

Step 1 : Softwares installation

You may refer to Step 1 of our tutorial Video Transcoding with VirtualDub. The only difference is that there will be no need to create the plugins32 directory. You can get the delogo121.zip file available in the « Associated Files » section below. Extract the .ZIP file and copy/paste its contents in the VirtualDub plugins directory.

Let's start VirtualDub by selecting VirtualDub.exe or launching its shortcut from the desktop. In the Menu File we load our video with Open video file...

Open video in VirtualDub

Step 2 : Filter application

Apply the DeLogo filter by going to Video Menu and select Filters ... :

Filter application

Then, Add... and select the filter DeLogo1.2.1 by pressing OK :

Filter selection

The filter settings window opens automatically. That is what you'll see :

Settings window

Step 3 : Filter Settings

Click on Show preview and in the window that opens, with the scrubber, choose a passage where the logo is clearly visible. In my case it is at the end of the video where the logo appears on the clear blue sky.

Return to the filter and select Save frame :

Save screenshot

The recording format must be BMP.

The BMP must be opened with an image editor like Paint. With a brush type tool you must fully cover the logo with a pure red (255,0,0).

Don't be afraid to go outside the logo a little and be sure all the pixels inside the logo are colored red.

This is the result :


In fact, we have just created a mask. It is on this mask that we will apply the blur algorithm filter.

Return to DeLogo and load this BMP file with Load... in the Repair section :

Mask loading

With Show preview you can see the results right away. If bits of the logo are still showing, you will have to add red to BMP, then save it again, reload with Load... all this without leaving DeLogo.

Step 5 : Last settings

In the Repair parameters zone :

Fine settings

you can fine-tune your work by modifying the following parameters :

  • Specify whether the video is interlaced or not with the Interlaced check box.
  • Increase or decrease the impact of the blur applied to the red mask by changing the Depth. It determines how many pixels wide around the red will be blurred.
  • With Power you can set the blur intensity.
  • Finally, with Pixel aspect you can modify the PAR (Pixel Aspect Ratio) depending on the format of the original video 4:3 or 16:9.

You can view the affects of your changes in real-time thanks to Show preview.

Step 5 : Export result

When you're done, click Close.

Then I invite you to read Steps 3 through 6 of our tutorial Video Transcoding with VirtualDub.

If you've done it correctly, the final result should be close to this:

It's magic, isn't it ?

{Thanks to Loosecannon for the fine tuning}

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Kero By # Kero @ Monday, January 26, 2009 12:15 PM
good article

Ralf By # Ralf @ Monday, January 26, 2009 1:59 PM
yes it's magic thx4 this grat tutorial.

Brian By # Brian @ Wednesday, April 15, 2009 5:23 PM
ok, im very new to the program so please forgive me but here goes, after the step 5, what do i do next, every tutorial I find ends at step 5, it doesnt say how to render the video, or process it if you will, cause when i close the filter and go to the main screen it shows the video with out the filter effect that i just entered, but if i go back into the filter screen its there. Is it just a matter of me going to File, Save as avi, and let it go?? If thats the case , it shows the video as if i didnt add the filter while its rendering, sorry if it sounds confusing. please help. thanks a bunch.

saby By # saby @ Thursday, April 16, 2009 9:39 AM
Hello Brian,

I think it's just a display problem. I mean, at the first opening, the Vdb window is too small to see at the same time the original video and the filtered video.
You must enlarge the window to see the filtered video.
Depending on the size of your screen it may not be sufficient. In such a case, right-clic the original and filtered video to adjust the level of zooming.

Tell me if it solves your problem.


paul By # paul @ Wednesday, August 26, 2009 3:01 PM
been looking everywhere for this works brilliantly on timers

GW By # GW @ Wednesday, October 28, 2009 9:11 PM
When I load the repair file and select preview, all I get is a static screen of the original frame that I chose. What I'm I doing wrong?

saby By # saby @ Thursday, October 29, 2009 1:29 AM

Are you sure to load the .bmp in the Repair section ?

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