on_color fails with TypeError when given a col_opacity parameter about moviepy HOT 6 CLOSED

Thanks for the feedback ! Have you tried with a newer version ? Like the one currently on Github or PyPI ? I can't garantee anything, but this example works on my computer.

Tell me if it works (and if the newer version works on your computer :) )

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I just installed the version from github, and the code now runs without throwing an error.

But now I don't get a background color at all if I supply any value of col_opacity. If it omit the col_opacity parameter I get a black box, as expected. If I add the col_opacity parameter I get no background color at all, regardless of what value I support. I tried col_opacity= 1, col_opacity= 0, col_opacity= 0.5, and others.

BTW, thanks for this great tool. I've been hand coding ffmpeg command lines, and moviepy is so much better!

from moviepy.

Here's some code that shows the background disappearing if I use a col_opacity argument:

from moviepy.editor import *

green= ColorClip((200,200), (0,255,0)).set_duration(5)
txt= TextClip('Hello, world!', color= 'white')

txt= txt.on_color(
    size= (100,100),
    #col_opacity= 0.5,  ## the black bg goes away if I uncomment this      
    ).set_duration(5)

video= CompositeVideoClip([green, txt])

video.to_videofile(
    'demos.mp4',
    fps= 25,
    codec= 'mpeg4',
)

And here's a couple of images showing a screen capture of the resulting video with and without col_opacity parameter.

Without col_opacity, I get a nice black background behind the text:

With col_opacity, it's gone:

from moviepy.

Thanks for the bug report, I just fixed it (I think).

from moviepy.

Confirmed, it works for me now. Thanks!

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Not a bug, but I've a related question : How to make "black" background disappear in the case above? How can I get full white text and remaining area should have full opacity green background? Not able to get this effect, maybe some specific type of blending is needed?

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