avcodec: Fix a typo in an option description

Signed-off-by: Martin Storsjö <martin@martin.st>
Signed-off-by: Clément Bœsch <ubitux@gmail.com>

doc/ffmpeg-codecs.texi

@@ -823,7 +823,7 @@ detect a good number of threads
 @end table
 
 @item me_threshold @var{integer} (@emph{encoding,video})
-Set motion estimaton threshold.
+Set motion estimation threshold.
 
 @item mb_threshold @var{integer} (@emph{encoding,video})
 Set macroblock threshold.

libavcodec/options_table.h

@@ -315,7 +315,7 @@ static const AVOption options[]={
 #endif
 {"threads", NULL, OFFSET(thread_count), AV_OPT_TYPE_INT, {.i64 = 1 }, 0, INT_MAX, V|E|D, "threads"},
 {"auto", "detect a good number of threads", 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, INT_MIN, INT_MAX, V|E|D, "threads"},
-{"me_threshold", "motion estimaton threshold", OFFSET(me_threshold), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX, V|E},
+{"me_threshold", "motion estimation threshold", OFFSET(me_threshold), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX, V|E},
 {"mb_threshold", "macroblock threshold", OFFSET(mb_threshold), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX, V|E},
 {"dc", "intra_dc_precision", OFFSET(intra_dc_precision), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, V|E},
 {"nssew", "nsse weight", OFFSET(nsse_weight), AV_OPT_TYPE_INT, {.i64 = 8 }, INT_MIN, INT_MAX, V|E},