avfilter/vf_drawbox: implement process_command

1 files changed, 14 insertions, 0 deletions

diff --git a/doc/filters.texi b/doc/filters.texi
index b00787d..e46839b 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -8847,6 +8847,13 @@ drawbox=x=-t:y=0.5*(ih-iw/2.4)-t:w=iw+t*2:h=iw/2.4+t*2:t=2:c=red
 @end example
 @end itemize
 
+@subsection Commands
+This filter supports same commands as options.
+The command accepts the same syntax of the corresponding option.
+
+If the specified expression is not valid, it is kept at its current
+value.
+
 @section drawgrid
 
 Draw a grid on the input image.
@@ -8932,6 +8939,13 @@ drawgrid=w=iw/3:h=ih/3:t=2:c=white@@0.5
 @end example
 @end itemize
 
+@subsection Commands
+This filter supports same commands as options.
+The command accepts the same syntax of the corresponding option.
+
+If the specified expression is not valid, it is kept at its current
+value.
+
 @anchor{drawtext}
 @section drawtext