Since video-aspect was replaced with video-aspect-override, we can no longer easily modify video aspect ratio with keybinds in input.conf (e.g. [ multiply video-aspect-override 0.95) since the default value of video-aspect-override is now -1 rather than taking on the video's actual aspect ratio.
This script provides a workaround by detecting the video's aspect ratio, and writes it into video-aspect-override so the keybinding works as expected.