[FFmpeg-cvslog] doc/encoders: add doc of the tier option for hevc_qsv

[nyanmisaka]

ffmpeg | branch: master | nyanmisaka <nst799610810 at gmail.com> | Wed Nov  2 01:58:07 2022 +0800| [af67f627d1a6767373b61e39c660e9680e2ed2ec] | committer: Haihao Xiang

doc/encoders: add doc of the tier option for hevc_qsv

Signed-off-by: nyanmisaka <nst799610810 at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=af67f627d1a6767373b61e39c660e9680e2ed2ec
---

 doc/encoders.texi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/doc/encoders.texi b/doc/encoders.texi
index 53dd02fd28..27110c3f44 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -3654,6 +3654,15 @@ Set the encoding profile (scc requires libmfx >= 1.32).
 @item scc
 @end table
 
+ at item @var{tier}
+Set the encoding tier (only level >= 4 can support high tier).
+This option only takes effect when the level option is specified.
+
+ at table @samp
+ at item main
+ at item high
+ at end table
+
 @item @var{gpb}
 1: GPB (generalized P/B frame)