[SCM] libav/experimental: Clarify usage of external libs whose functionality exists natively.

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit b44d58e61ef754f55ae5c33aa861b27d0d1c399e
Author: Diego Biurrun <diego at biurrun.de>
Date:   Tue Jan 30 22:12:02 2007 +0000

    Clarify usage of external libs whose functionality exists natively.
    
    Originally committed as revision 7771 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/configure b/configure
index 8586344..6348a69 100755
--- a/configure
+++ b/configure
@@ -87,12 +87,15 @@ show_help(){
   echo "  --enable-faadbin         build FAAD support with runtime linking [default=no]"
   echo "  --enable-libgsm          enable GSM support via libgsm [default=no]"
   echo "  --enable-mp3lame         enable MP3 encoding via libmp3lame [default=no]"
-  echo "  --enable-libnut          enable NUT support via libnut [default=no]"
+  echo "  --enable-libnut          enable NUT (de)muxing via libnut, native demuxer"
+  echo "                           exists [default=no]"
   echo "  --enable-libogg          enable Ogg muxing via libogg [default=no]"
   echo "  --enable-libtheora       enable Theora encoding via libtheora [default=no]"
-  echo "  --enable-vorbis          enable Vorbis en/decoding via libvorbis [default=no]"
+  echo "  --enable-vorbis          enable Vorbis en/decoding via libvorbis, native"
+  echo "                           implementations exist [default=no]"
   echo "  --enable-x264            enable H.264 encoding via x264 [default=no]"
-  echo "  --enable-xvid            enable Xvid encoding via xvidcore [default=no]"
+  echo "  --enable-xvid            enable Xvid encoding via xvidcore, native"
+  echo "                           MPEG-4/Xvid encoder exists [default=no]"
   echo "  --enable-amr_nb          enable amr_nb float audio codec"
   echo "  --enable-amr_nb-fixed    use fixed point for amr-nb codec"
   echo "  --enable-amr_wb          enable amr_wb float audio codec"

-- 
Libav/FFmpeg packaging