Well for instance you can use it to apply tranparencys or other effects using the geq filter. It applies a formula to every pixel in the input and can adjust alpha, rgb values, and gamma. You can also use conditionals in your formula and have access to the current pixels location and value, so you can apply your transforms only to specific regions if you want, or do an adjustment keyed only to a specific color.
That and more really. You could use it to do a green screen effect, but you can also use it to adjust color balance, brightness or do weirder things like swapping values between colors. It gets really crazy when you are working with full video because the time of the current frame is also available to be incorporated, so you can even do animated effects.
Another powerful filter is the convolve filter. That allows you to apply matrix transformations, which can for example be used to apply a homography matrix and adjust a videos perspective.
I love you ffmpeg
Its insane just how important it is and the vast majority of the world doesn’t even know it exists. Truly unsung heroes (everyone who works on it).
I’m surprised nobody posted the xkcd comic. I think Randall had ImageMagick in mind (he names it in the alt text) but it applies to ffmpeg as well.
I always used to think about curl when I see that comic. Maybe less important in recent years but still a corner stone.
Curl is less important in the cloudverse?
I’ll bite!
https://xkcd.com/2347/
At this point that picture should be multiple layers of precariously stacked tiny pillars making up the entire base.
Kinda like curl.
Ffmpeg has been such cool software to learn. Simple filter chains can do incredible things
Please, go on!
Well for instance you can use it to apply tranparencys or other effects using the geq filter. It applies a formula to every pixel in the input and can adjust alpha, rgb values, and gamma. You can also use conditionals in your formula and have access to the current pixels location and value, so you can apply your transforms only to specific regions if you want, or do an adjustment keyed only to a specific color.
You’re talking about green screen right? :D
Have you seen this? Green screen on crack.
https://m.youtube.com/watch?v=UQuIVsNzqDk
That and more really. You could use it to do a green screen effect, but you can also use it to adjust color balance, brightness or do weirder things like swapping values between colors. It gets really crazy when you are working with full video because the time of the current frame is also available to be incorporated, so you can even do animated effects.
Another powerful filter is the convolve filter. That allows you to apply matrix transformations, which can for example be used to apply a homography matrix and adjust a videos perspective.
I am using this comment to trick my lemmy client into going to the community, sorry
!ffmpeg@programming.dev