[PATCH] gnu: Add bs1770gain.

[Alex Griffin <a@ajgrf.com>]

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This patch adds bs1770gain, a tool for adjusting and normalizing the
loudness of audio and video files.
-- 
Alex Griffin

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From 166ed6d602c21bdc6544775327424187ac19cc3d Mon Sep 17 00:00:00 2001
From: Alex Griffin <a@ajgrf.com>
Date: Wed, 3 Aug 2016 15:02:04 -0500
Subject: [PATCH 1/2] gnu: Add bs1770gain.

* gnu/packages/video.scm (bs1770gain): New variable.
---
 gnu/packages/video.scm | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/gnu/packages/video.scm b/gnu/packages/video.scm
index e3da8f1..169cbb5 100644
--- a/gnu/packages/video.scm
+++ b/gnu/packages/video.scm
@@ -1562,3 +1562,26 @@ and MPEG system streams.")
                    license:lgpl2.1
                    license:lgpl2.1+
                    license:gpl2))))
+
+(define-public bs1770gain
+  (package
+    (name "bs1770gain")
+    (version "0.4.10")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "mirror://sourceforge/bs1770gain/bs1770gain/"
+                           version "/bs1770gain-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1syr8qchs8091z9ayivj723szlidx81gll099bmk9kgpykmckd62"))))
+    (build-system gnu-build-system)
+    (inputs `(("ffmpeg" ,ffmpeg)
+              ("sox" ,sox)))
+    (home-page "http://bs1770gain.sourceforge.net/")
+    (synopsis "Tool to adjust loudness of media files")
+    (description
+     "BS1770GAIN is a loudness scanner compliant with ITU-R BS.1770 and its
+flavors EBU R128, ATSC A/85, and ReplayGain 2.0.  It helps normalizing the
+loudness of audio and video files to the same level.")
+    (license license:gpl2)))
-- 
2.9.2