[FFmpeg-cvslog] gradfun: add notice from the MPlayer manual

[Stefano Sabatini]

ffmpeg | branch: master | Stefano Sabatini <stefano.sabatini-lala at poste.it> | Sat Apr  9 13:49:57 2011 +0200| [3eccfaa01291ca90e7dcb934bb06d048fcba1f43] | committer: Anton Khirnov

gradfun: add notice from the MPlayer manual

Add notice telling that the filter is designed for playback only.

Signed-off-by: Anton Khirnov <anton at khirnov.net>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3eccfaa01291ca90e7dcb934bb06d048fcba1f43
---

 doc/filters.texi |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/doc/filters.texi b/doc/filters.texi
index 00a954c..c2e5aed 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -471,6 +471,10 @@ regions by truncation to 8bit colordepth.
 Interpolate the gradients that should go where the bands are, and
 dither them.
 
+This filter is designed for playback only.  Do not use it prior to
+lossy compression, because compression tends to lose the dither and
+bring back the bands.
+
 The filter takes two optional parameters, separated by ':':
 @var{strength}:@var{radius}