Update AbstractData.php
Update AbstractData.php

Ability to set default return values when a property is not available in the probe results
Pixy/PHP-FFMpeg,we-bridge/PHP-FFMpeg,gcc-roblox/gcc-roblox.github.io,mruse/PHP-FFMpeg,burzum/PHP-FFMpeg,superdol/PHP-FFMpeg,gcc-roblox/gcc-roblox.github.io,soluciones-gbh/PHP-FFMpeg,beeseenmedia/PHP-FFMpeg,NAMEs/PHP-FFMpeg,lb0913/PHP-FFMpeg