[FFmpeg-cvslog] doc/filters: layout requirements for xstack

[Gyan Doshi]

ffmpeg | branch: master | Gyan Doshi <ffmpeg at gyani.pro> | Tue May  7 18:12:24 2019 +0530| [a0328f05dc02e61e8173f981cd578d0a36d7c0fc] | committer: Gyan Doshi

doc/filters: layout requirements for xstack

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a0328f05dc02e61e8173f981cd578d0a36d7c0fc
---

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

diff --git a/doc/filters.texi b/doc/filters.texi
index 3c15bb95f4..7b935903f8 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -18388,6 +18388,9 @@ where X is video input from which to take width or height.
 Multiple values can be used when separated by '+'. In such
 case values are summed together.
 
+For 2 inputs, a default layout of @code{0_0|w0_0} is set. In all other cases,
+a layout must be set by the user.
+
 @item shortest
 If set to 1, force the output to terminate when the shortest input
 terminates. Default value is 0.