From a5dfb97085f356d8d2bbd2c53bfb877c128db99f Mon Sep 17 00:00:00 2001
From: Xi Ruoyao <xry111@mengyan1223.wang>
Date: Mon, 22 Jun 2020 14:37:24 +0000
Subject: [PATCH] ffmpeg: add optional dependency libdrm and the configure
 option to use it

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@23311 af4574ff-66df-0310-9fd7-8a98e5e911e0
---
 multimedia/videoutils/ffmpeg.xml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/multimedia/videoutils/ffmpeg.xml b/multimedia/videoutils/ffmpeg.xml
index 591f48b2a4..03fc7f7e90 100644
--- a/multimedia/videoutils/ffmpeg.xml
+++ b/multimedia/videoutils/ffmpeg.xml
@@ -107,6 +107,7 @@
       <xref linkend="fontconfig"/>,
       <xref linkend="frei0r"/>,
       <xref linkend="libcdio"/> (to identify and play CDs),
+      <xref linkend="libdrm"/> (for <quote>kmsgrab</quote> input),
       <xref linkend="libwebp"/>,
       <xref linkend="opencv"/>,
       <xref linkend="openjpeg2"/>,
@@ -352,6 +353,12 @@ grep ^TEST ../fate.log | wc -l</userinput></screen>
       rendering via <filename class="libraryfile">libass</filename>.
     </para>
 
+    <para>
+      <option>--enable-libdrm</option>: Use it if <xref linkend="libdrm"/>
+      is installed, to build <quote>kmsgrab</quote> input module which is
+      useful for screen capturing or streaming.
+    </para>
+
     <para>
       <parameter>--enable-libfdk-aac</parameter>: Enables currently the
       highest-quality AAC audio encoding via <filename