docu: fix flite example

Signed-off-by: rogerdpack <rogerpack2005@gmail.com>

doc/ffmpeg.texi

@@ -58,7 +58,7 @@ options apply ONLY to the next input or output file and are reset between files.
 @item
 To set the video bitrate of the output file to 64kbit/s:
 @example
-ffmpeg -i input.avi -b:v 64k output.avi
+ffmpeg -i input.avi -b:v 64k -bufsize 64k output.avi
 @end example
 
 @item

doc/filters.texi

@@ -1141,7 +1141,7 @@ flite=text='So fare thee well, poor devil of a Sub-Sub, whose commentator I am':
 Make @file{ffplay} speech the specified text, using @code{flite} and
 the @code{lavfi} device:
 @example
-ffplay -f lavfi flite='No more be grieved for which that thou hast done.'
+ffplay -f lavfi flite=text='No more be grieved for which that thou hast done.'
 @end example
 @end itemize