Hi,

I want to blur a rectangular area in a video, I have to repeat BLUR, not pixelate. I don't want the obscure effect, or any other that people seem to confuse with blur. I don't want large macroblocks or pixels that look like **** and show in a very clumsy way "hey, here is something I want to censor" (Pixelate was probably used when video processors could not do real time blurs) I want to blur the area, making the area our of focus and indistinct, basically what you get when you use the blur effect in Kdenlive, except that that effect cannot be used for just an area.
Is there a way to use a mask to predefine that the effect should only be applied to part of the video?
I don't know much about masks, but I thought that's what they're good for.

You can give Windows Movie Maker a shot. It's fairly easy.

1.First, open your desired project and select the Home tab. Click on the "Caption" button to create a caption text-box within the preview window. With the text box selected, choose "Wingdings" from the Font menu and then type the letter N to create small black boxes inside the caption.

2.Next, make sure your caption box is still selected and choose "Thick" in the text "Outline size" setting, and then choose "Black" in the "Outline color" setting. This will change your caption boxes into one black mass, which you can drag anywhere on the frame to obscure something important. If you like, you can choose another color besides black, or edit the transparency in the top toolbar so that it looks more opaque.

3.To extend your caption for the entire clip or video, just change the "Text duration" on the top toolbar. Just like in iMovie, this technique only works if the obscured object is not moving very much. Otherwise, you'll have to create new captions that follow your object during certain sections of your clip, which can be extremely time-consuming.

rexli wrote:You can give Windows Movie Maker a shot. It's fairly easy.

Very hard on Linux distributions

BTW the auto-mask keyframe export to clipboard is not working or the keyframe importo from clipboard is not working, this is the ISSUE: https://invent.kde.org/kde/kdenlive/issues/23

without the keyframes it's not possible to track a rectangular region i hope this will fixed soon.

It you don't want your area to move, use region (i'm not sure if it's available with v19+) (explainatory vid here: https://www.youtube.com/watch?v=ysMTH1_hI6w ). Else you can use 2 tracks with the same video and add blur to the upper one, and rotoscoping to delimitate where you want it blurred.

rexli wrote:You can give Windows Movie Maker a shot. It's fairly easy.

1.First, open your desired project and select the Home tab. Click on the "Caption" button to create a caption text-box within the preview window. With the text box selected, choose "Wingdings" from the Font menu and then type the letter N to create small black boxes inside the caption.

2.Next, make sure your caption box is still selected and choose "Thick" in the text "Outline size" setting, and then choose "Black" in the "Outline color" setting. This will change your caption boxes into one black mass, which you can drag anywhere on the frame to obscure something important. If you like, you can choose another color besides black, or edit the transparency in the top toolbar so that it looks more opaque.

3.To extend your caption for the entire clip or video, just change the "Text duration" on the top toolbar. Just like in iMovie, this technique only works if the obscured object is not moving very much. Otherwise, you'll have to create new captions that follow your object during certain sections of your clip, which can be extremely time-consuming.

I first thought you were joking. I'm not going to use Windows Movie Maker, first of all, Microsoft is not making available for Linux and it is not Multiplattform, which all my tools are required to be. Also, Windows Movie maker is a toy compared to Kdenlive and I like the tool, I like opensource. It is something I support actively.

Finally we are again able to save (an importing them) the Automask datas



Linux nightly: https://binary-factory.kde.org/search/? ... mage_Build
Windows nightly: https://binary-factory.kde.org/job/Kden ... y_mingw64/

a tutorial on how to made an obscure effect using images: https://www.youtube.com/watch?v=BJmKE-4 ... e=youtu.be

Maybe use rotoscope on a copy of the video, for as long as effects does not support a mask?

it's necessary that "blur box" (that can import keyframes from clipboard) can accept geometry keyframes to solve this issue... or to add some new effects to auto-mask tool... i suggested to make the Auto-mask effect just a motion tracking effect (without any sort of blur/obscure) and modify obscure (or blur) to have some obscuration effects (also localized color changes)

these are changes that can be done only by developers, for now, blurring a part of a video (in motion) is not possible. (i tried a lot of experiments... but nothing)