I need to print text at random position (to protect videos).
The following works, but it seems that the random position is updated at miliseconds what makes the text go crazy across the screen. Someone has any idea? Thanks
ffmpeg -i video.mov -vf "drawtext=fontfile=/Windows/Fonts/arial.ttf: text='Test Text':x=random(1)*w: y=random(1) * h" -acodec copy output.avi