CODEWITHSUNDEEP
ffmpeg
Dustin Kerstein
Dustin Kerstein

Reputation: 450

Add unique color watermark per frame with FFMpeg

I've been able to add a random color watermark with this code:

ffmpeg -y -r 100 -i "N%3d.tif" -c:v libx264 -vf "drawbox=y=0:color=random@1:width=8:height=ih:t=fill,scale=1920:1080" -crf 30 -g 10 -profile:v high -level 4.1 -pix_fmt yuv420p test.mp4

And I know that it's doable with a script and processing each input frame individually, but I would really like to find a way with FFMpeg to add the watermark during the actual video encoding. It needs to be a unique color per frame. Any ideas on how to accomplish this?

Thanks!

Upvotes: 0

Views: 958

Answers (1)

Gyan
Gyan

Reputation: 93058

The drawbox expression is only evaluated once. But the hue filter can be used to vary the color.

In the command below, a small portion from the left side of the frame is cropped off, a color is drawn once, and then its hue varied. This is then overlaid on the full frame. 

ffmpeg -y -framerate 100 -i "N%3d.tif"
       -filter_complex "[0]split=2[wm][vid];[wm]crop=8:ih,drawbox=color=random@1:t=fill,
                           hue=n*random(1234)[wm];[vid][wm]overlay,scale=1920:1080" 
       -c:v libx264 -crf 30 -g 10 -profile:v high -level 4.1 -pix_fmt yuv420p test.mp4

Upvotes: 1

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