How can I use php-FFMpeg in laravel 5.1 to convert uploaded GIF image to video format automatically?

I have installed php-ffmpeg in my localhost Laravel setup, but I need help on how to use ffmpeg with Laravel 5.1.

I need this to convert gif image into .mp4 video format automatically. (Example: Gif uploaded in 9gag.com)

Please also suggest if there is any alternative solution to the requirement.

via Chebli Mohamed