Blurred background with text over it

[Hakunamatata67]

Hi,

I'd like to know if it's possible to create a blurred with a text on it with ASSA ovverid tags.
For example, here is the original video:
[Attachment 68165 - Click to enlarge]

And I'd like to be this way:
[Attachment 68166 - Click to enlarge]

Is it possible?
Thanks

[pcspeak]

Hi.
For me the trick to the whole process you want is to FIRST create and position the blurring to wipe the original text.
THEN add the subtitles.
[Click for larger image]

2 sets of coordinates mentioned here:
- crop=1000:100:120:400 : This denotes a 1000x100 pixel box located 120 pixels to the right and 400 pixels down from the top left corner.
- overlay=120:400 : Use the same as the last two coordinates mentioned in the crop to ensure the blurred effect is applied on the pixels that are located where the box is.
- boxblur=20 indicates the power of the blurring effect that I used. 10-20 is a good range.

ffmpeg -i "NotMyVideo.mp4" -filter_complex "[0:v]crop=1000:100:120:400,boxblur=10[fg]; [0:v][fg]overlay=120:400[v]" -map "[v]" -map 0:1 -c:a copy -y "blurredVideo.mp4"

I would then use a standard .ass subtitles file to insert the text you want.
Use .ass subs and NOT .srt.
.ass allows better control of the positioning of the text, if necessary.

I don't use .ass subs often. I've never done what you are trying to do.

If needed, best to start a thread here in the subtitles section, asking for help on positioning of .ass subs.


Cheers.

[Hakunamatata67]

I tried with only ASS tags, but I didn't succeed.
I may try your method even though it will take a lot of time ! thanks!