ffmpeg updated to version 3.1.2

Upated PKGBUILD and switched to .tar.xz file format.

mingw-w64-ffmpeg/PKGBUILD

@@ -3,7 +3,7 @@
 _realname=ffmpeg
 pkgbase="mingw-w64-${_realname}"
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
-pkgver=3.1.1
+pkgver=3.1.2
 pkgrel=1
 pkgdesc="Complete and free Internet live audio and video broadcasting solution (mingw-w64)"
 arch=('any')
@@ -40,9 +40,9 @@ depends=(
         "${MINGW_PACKAGE_PREFIX}-zlib"
         )
 makedepends=("${MINGW_PACKAGE_PREFIX}-gcc" "${MINGW_PACKAGE_PREFIX}-pkg-config" "${MINGW_PACKAGE_PREFIX}-yasm")
-source=(https://ffmpeg.org/releases/${_realname}-${pkgver}.tar.bz2{,.asc})
+source=(https://ffmpeg.org/releases/${_realname}-${pkgver}.tar.xz{,.asc})
 validpgpkeys=('FCF986EA15E6E293A5644F10B4322F04D67658D8')
-sha256sums=('a5bca50a90a37b983eaa17c483a387189175f37ca678ae7e51d43e7610b4b3b4'
+sha256sums=('58d2a2b69f0f46fe8aacd45e582c62e380ba611b5baf6a4dfcf2906eb2b9bd61'
             'SKIP')
 
 prepare() {