lavfi: restore mixed short/long option support with the new system.

process_unnamed_options() is renamed to process_options() and its code
is heavily based on av_opt_set_from_string().

1 files changed, 7 insertions, 1 deletions

diff --git a/doc/filters.texi b/doc/filters.texi
index ffdc0db570..7fd1481161 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -137,7 +137,7 @@ The name of the filter class is optionally followed by a string
 "=@var{arguments}".
 
 @var{arguments} is a string which contains the parameters used to
-initialize the filter instance. It may have one of the two allowed forms:
+initialize the filter instance. It may have one of the following forms:
 @itemize
 
 @item
@@ -151,6 +151,12 @@ declares three options in this order -- @option{type}, @option{start_frame} and
 @var{in} is assigned to the option @option{type}, @var{0} to
 @option{start_frame} and @var{30} to @option{nb_frames}.
 
+@item
+A ':'-separated list of mixed direct @var{value} and long @var{key=value}
+pairs. The direct @var{value} must precede the @var{key=value} pairs, and
+follow the same constraints order of the previous point. The following
+@var{key=value} pairs can be set in any preferred order.
+
 @end itemize
 
 If the option value itself is a list of items (e.g. the @code{format} filter