Effects in video - newbie needs help!

[ANOther1676]

I've saved videos from DVB-T, and some have an intrusive DOG (digital on-screen graphic) which I'd like to fade, like this:
(image attached)

I realize I can't remove the graphic entirely, since it was probably already added in post-production, so fading it etc. is probably the only option and best one for it.

How would I accomplish this, and has anyone here tried doing it so I know if it's worth doing?

[jagabo]

You can overlay them with black (or whatever color you want) boxes. Or you use any of the "delogo" filters. But that will leave you with fuzzy blobs where the text used to be.

Search for forums for examples. Here's are some examples:

https://forum.videohelp.com/threads/327527-Blurring-and-overlapping-hard-subtitles

https://forum.videohelp.com/threads/221665-Removing-Logos-using-DeLogo-vdub-filter?high...tualdub+delogo

You're "logo" removal won't work as well as the the samples in the second link because your logos aren't semi-transparent.

[ANOther1676]

You can overlay them with black (or whatever color you want) boxes. Or you use any of the "delogo" filters. But that will leave you with fuzzy blobs where the text used to be.

Thanks for that.
Not expecting to de-logo it, just fade the logo out so the date/time is visible, even if the logo is faded out like in the clip below.
Sort of like this (OK, so the time/date is not de-logo'd but the on-screen graphic isn't as obvious/bright):

[jagabo]

Since they don't move just cover them with black (or other color) boxes. VirtualDub has a Fill (rectangular box) filter. Just about every editor has an Overlay feature. Here's VirtualDub and single Fill filter to cover the timestamp in your first image with a gray box:

[ANOther1676]

Almost there, but not quite. Thanks for mentioning that, I will give that a go if I need to do that to any MPEG-2 files.
However, I'm trying to make the green logo fade out like the image here, with the faded logo:
https://forum.videohelp.com/threads/330638-Effects-in-video-newbie-needs-help%21?p=2048...=1#post2048072

It's the one on the top-left of the screenshot.

Thanks for your help!

[poisondeathray]

If you mean the ITV station overlay, no you can't

You can fade it out, but there will be "nothing" underneath it. The numbers "underneath" won't magically become more clear . The station graphic has been added AFTER the video was taken, so that information covered up is forever lost.

To explain in other terms, even if you fade that layer out , using an alpha channel (tranparency) and mask it out, you have to replace it with something (ie. something has to show through). That "something" is usually black. The real information (the numbers in the screenshot) below is gone.

This isn't CSI Miami

[ANOther1676]

Now I understand things better. I think I'll just leave them as they are.

[intracube]

I think the ITV channels have changed their logo over recent months from solid to semi-transparent. I guess your first example was recorded some time ago.

I'm not sure what video processing tools you're familiar with - or if you're hoping for a 'one click' solution. I haven't come across a automated logo removal program that works well, unfortunately.

It's difficult to do much with solid logos. You could copy and paste nearby pixels over it, then blur the area. But on a lot of content you'll be aware of a fuzzy patch in the corner of the screen. The logo in my example is semi-transparent, but if it were solid you could do this:

It works quite effectively on this particular example:


Semi-transparent logos can be more successfully removed - but it depends on how determined you are. Five showed a 16:9 full frame version of Black Hawk Down a while back, rather than the cropped 2.39:1 version available on DVD*. As the 16:9 version isn't easily available elsewhere, I took the broadcast version and created a composite node system in Blender to try and clean it up:



I used several masks for different regions of the logo, and split the source into HSV (hue, saturation, value) working mostly on the 'value' (luma) channel.

I've only tried this out on a few short sections of the film, while the result wasn't perfect - the logo is noticeable on a few shots, it was definitely an improvement.


*As the film was shot on Super35

[ANOther1676]

I see. Was Blender used for the first picture?

[intracube]

I see. Was Blender used for the first picture?

The GIMP (www.gimp.org)

[jagabo]

A solid, unchanging, background is easily replaced with VirtualDub's Fill filter. You can perform more difficult fills with AviSynth and a mixture of Crop(), Resize(), Blur(), Overlay() etc.

[ANOther1676]

Should add that the videos are MPEG, saved in MPEG-2 format.