Support ffmpeg and avconv depending on which you have
Support ffmpeg and avconv depending on which you have

charnimda/lgbtpzn-social,foocorp/gnu-social,charnimda/lgbtpzn-social,charnimda/lgbtpzn-social,chimo/social,chimo/social,foocorp/gnu-social,chimo/social,foocorp/gnu-social