doc/codecs: Add missing documentation for nointra

Add missing documentation for nointra.

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

diff --git a/doc/codecs.texi b/doc/codecs.texi
index 6b7276017f422284d92760d0abd5948cd4b79116..0d0de94c5491131af62384143e316ee4ae6f6d42 100644 (file)
--- a/doc/codecs.texi
+++ b/doc/codecs.texi
@@ -963,6 +963,9 @@ Discard all bidirectional frames.
 @item nokey
 Discard all frames excepts keyframes.
 
+@item nointra
+Discard all frames except I frames.
+
 @item all
 Discard all frames.
 @end table