[FFmpeg-cvslog] doc/codecs: Add missing documentation for nointra

[Jun Zhao]

ffmpeg | branch: master | Jun Zhao <barryjzhao at tencent.com> | Sun Jul 14 15:02:11 2019 +0800| [af5f770113212b2893e897a04b007c1e1428bb26] | committer: Jun Zhao

doc/codecs: Add missing documentation for nointra

Add missing documentation for nointra.

Reviewed-by: Michael Niedermayer <michael at niedermayer.cc>
Signed-off-by: Jun Zhao <barryjzhao at tencent.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=af5f770113212b2893e897a04b007c1e1428bb26
---

 doc/codecs.texi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/doc/codecs.texi b/doc/codecs.texi
index 6b7276017f..0d0de94c54 100644
--- a/doc/codecs.texi
+++ b/doc/codecs.texi
@@ -963,6 +963,9 @@ Discard all bidirectional frames.
 @item nokey
 Discard all frames excepts keyframes.
 
+ at item nointra
+Discard all frames except I frames.
+
 @item all
 Discard all frames.
 @end table