[FFmpeg-cvslog] doc/protocols: add option usage description

[Lou Logan]

ffmpeg | branch: master | Lou Logan <lou at lrcd.com> | Mon Feb 13 12:23:03 2017 -0900| [fb32c561c3820f3bc8833d0c3629388539fe4798] | committer: Lou Logan

doc/protocols: add option usage description

Fixes ticket #6148.

Signed-off-by: Lou Logan <lou at lrcd.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fb32c561c3820f3bc8833d0c3629388539fe4798
---

 doc/protocols.texi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/doc/protocols.texi b/doc/protocols.texi
index e887b75..a7968ff 100644
--- a/doc/protocols.texi
+++ b/doc/protocols.texi
@@ -5,6 +5,11 @@ The libavformat library provides some generic global options, which
 can be set on all the protocols. In addition each protocol may support
 so-called private options, which are specific for that component.
 
+Options may be set by specifying - at var{option} @var{value} in the
+FFmpeg tools, or by setting the value explicitly in the
+ at code{AVFormatContext} options or using the @file{libavutil/opt.h} API
+for programmatic use.
+
 The list of supported options follows:
 
 @table @option