[FFmpeg-cvslog] doc/filters.texi: prefer @example over the unsupported @ math for showing equation

[Stefano Sabatini]

ffmpeg | branch: master | Stefano Sabatini <stefasab at gmail.com> | Tue Jan 24 23:32:49 2012 +0100| [23534d0c4c4ab6efc1855fbd54948ce65aff28c3] | committer: Stefano Sabatini

doc/filters.texi: prefer @example over the unsupported @math for showing equation

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=23534d0c4c4ab6efc1855fbd54948ce65aff28c3
---

 doc/filters.texi |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/doc/filters.texi b/doc/filters.texi
index 444949c..7a148cd 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -2342,7 +2342,9 @@ output video.
 
 This is done by changing the specified Sample (aka Pixel) Aspect
 Ratio, according to the following equation:
- at math{DAR = HORIZONTAL_RESOLUTION / VERTICAL_RESOLUTION * SAR}
+ at example
+ at var{DAR} = @var{HORIZONTAL_RESOLUTION} / @var{VERTICAL_RESOLUTION} * @var{SAR}
+ at end example
 
 Keep in mind that the @code{setdar} filter does not modify the pixel
 dimensions of the video frame. Also the display aspect ratio set by