[FFmpeg-devel] [PATCH]Slightly improve configure --help output

[Carl Eugen Hoyos]

Hi!

Users currently cannot easily know how to enable filters like the drawtext 
filter. Attached patch tries to improve this.

Please comment, Carl Eugen
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diff --git a/configure b/configure
index c046e34..d5c73a0 100755
--- a/configure
+++ b/configure
@@ -194,25 +194,26 @@ Individual component options:
 External library support:
   --enable-avisynth        enable reading of AviSynth script files [no]
   --disable-bzlib          disable bzlib [autodetect]
-  --enable-fontconfig      enable fontconfig
-  --enable-frei0r          enable frei0r video filtering
-  --enable-gnutls          enable gnutls [no]
+  --enable-fontconfig      enable fontconfig, useful for drawtext filter [no]
+  --enable-frei0r          enable frei0r video filtering [no]
+  --enable-gnutls          enable gnutls, needed for https support [no]
   --disable-iconv          disable iconv [autodetect]
-  --enable-ladspa          enable LADSPA audio filtering
+  --enable-ladspa          enable LADSPA audio filtering [no]
   --enable-libaacplus      enable AAC+ encoding via libaacplus [no]
-  --enable-libass          enable libass subtitles rendering [no]
+  --enable-libass          enable libass subtitles rendering,
+                           needed for subtitles and ass filter [no]
   --enable-libbluray       enable BluRay reading using libbluray [no]
   --enable-libbs2b         enable bs2b DSP library [no]
-  --enable-libcaca         enable textual display using libcaca
+  --enable-libcaca         enable textual display using libcaca [no]
   --enable-libcelt         enable CELT decoding via libcelt [no]
-  --enable-libcdio         enable audio CD grabbing with libcdio
+  --enable-libcdio         enable audio CD grabbing with libcdio [no]
   --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
                            and libraw1394 [no]
   --enable-libfaac         enable AAC encoding via libfaac [no]
   --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
   --enable-libflite        enable flite (voice synthesis) support via libflite [no]
-  --enable-libfreetype     enable libfreetype [no]
-  --enable-libfribidi      enable libfribidi [no]
+  --enable-libfreetype     enable libfreetype, needed for drawtext filter [no]
+  --enable-libfribidi      enable libfribidi, improves drawtext filter [no]
   --enable-libgme          enable Game Music Emu via libgme [no]
   --enable-libgsm          enable GSM de/encoding via libgsm [no]
   --enable-libiec61883     enable iec61883 via libiec61883 [no]