Steps to Video Overlaying and Bluescreen (Chroma key)

[Crue Knight]

Hey, Im used VLC player for a while but just recently found out about the Logo Overlay feature and the bluescreen feature which I have been looking for for quite a while. So I wan relieved to find out the VLC player has that feature.

What I need to know, is how do you use video overlay and with the bluescreen feature? And what is a good way to find the excact "U" and "V" code for my background color to turn alpha?

As an extra question to throw out, can you make the logo overlay to fade in and out?

[VLC_help]

http://www.mikekohn.net/file_formats/yu ... verter.php
that should do the color conversions

you can create fading logo using multiple logo files with different transparency settings.

[Crue Knight]

Oh, thats. That helped alot.

How do I get two videos, to layer each other... or one video under the transparent one.

As for the logo, I'm not sure how I would get two logos on the same vid. Is there a timeline option I could use to put the different logo transparencies on.

Should I use Extended settings for this or preferences?

Sorry for all the questions but it's a bit confusing for me.

[VLC_help]

I haven't found any GUI option to put video on top of another video. (nor command-line one)

Two logo filters might work from command line, but I have never tested it.
http://wiki.videolan.org/Documentation: ... deo_filter

[Crue Knight]

So you can't layer videos? I thought that was one of the features of vlc...
What does the Logo Erase do.
Man I need a tutorial...Is there a complete description of all the filters?

[Arite]

What exactly do you wish to do? AFAIK you cannot overlay two videos, and adding a logo/using the erase filter is limited to one image etc.

The logo erase filter works by applying a mask to the image, the alpha channel is the only thing that is used to build the mask (as described here).

If you take a snapshot of the video with the logo showing (preferably only the logo showing - e.g. a black screen with just the logo is a good one), and then edit the snapshot in a program that can handle alpha channels (such as GIMP). Add an alpha channel, then remove everything except the logo so that only the logo is visible on top of the alpha channel. Save the image (PNG is recommended ) and use it as the mask via the Extended Settings.

Alternatively use the commandline such as:

Code: Select all

vlc --video-filter erase --erase-mask "logo-erase-mask.png" INPUT

Where INPUT is the video and "logo-erase-mask.png" is the mask image.

Cheers, Arite.

[Crue Knight]

So suppose I wish to make a "News Broadcast" type of video, with me in the front of the video and a blue screen in the background. I then wish to replace that bluescreen with a weather map ect.

I also wanted to make a "moving advertisement" as a moving logo (or video) on the bottom of the screen.

So I suppose that would require a video on top of the current video. What would be the purpose of the bluescreen feature then?

[VLC_help]

http://wiki.videolan.org/Documentation: ... bluescreen
there is tutorial. So it requires VLM config.