ss patch by (Benjamin Larsson <banan at student dot ltu dot se>)

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@2859 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

doc/ffmpeg-doc.texi

@@ -173,6 +173,10 @@ overwrite output files
 set the recording time in seconds. @code{hh:mm:ss[.xxx]} syntax is also
 supported.
 
+@item -ss position
+seek to given time position. @code{hh:mm:ss[.xxx]} syntax is also
+supported.
+
 @item -title string       
 set the title