Use watermark image while watermarking!
Use watermark image while watermarking!

The filter does not seem to actually use the watermark (image path). This update fixes the functionality.
we-bridge/PHP-FFMpeg,NAMEs/PHP-FFMpeg,soluciones-gbh/PHP-FFMpeg,gcc-roblox/gcc-roblox.github.io,gcc-roblox/gcc-roblox.github.io,mruse/PHP-FFMpeg,lb0913/PHP-FFMpeg,burzum/PHP-FFMpeg,Pixy/PHP-FFMpeg,beeseenmedia/PHP-FFMpeg,superdol/PHP-FFMpeg