From 1b54b2aa0d670ac98c3d5529a19f67bd2a219e1e Mon Sep 17 00:00:00 2001
From: David Guibert <david.guibert@gmail.com>
Date: Mon, 15 Jun 2020 18:01:49 +0200
Subject: [PATCH] ffmpeg: set explicit --enable-libass

needed for subtitles filter.
---
 pkgs/development/libraries/ffmpeg/generic.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/libraries/ffmpeg/generic.nix b/pkgs/development/libraries/ffmpeg/generic.nix
index 5b98884c1fc..d763fb51354 100644
--- a/pkgs/development/libraries/ffmpeg/generic.nix
+++ b/pkgs/development/libraries/ffmpeg/generic.nix
@@ -126,6 +126,7 @@ stdenv.mkDerivation rec {
     # Docs
       (ifMinVer "0.6" "--disable-doc")
     # External Libraries
+      "--enable-libass"
       "--enable-bzlib"
       "--enable-gnutls"
       (ifMinVer "1.0" "--enable-fontconfig")