1

I want to extract all video frames as images and change every black (pure black) pixel of the images to a special color. (R=3,G=3,B=3)

I used this command to extract video frames :

ffmpeg -I myVideo.avi -f image2 -vf yadif -vcodec png image%d

Please tell me how to change every black pixel of the images to color that I want? (I want R=3,G=3,B=3)

Thanks.

1

You can use the LUT or GEQ filters for this.

e.g. with LUT

ffmpeg -i myVideo.avi
       -vf
       "yadif,format=rgb24,
        lutrgb=r='if(eq(val,0),3,val)':g='if(eq(val,0),3,val)':b='if(eq(val,0),3,val)'"
image%d.png

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.