avfilter/vf_neighbor: add support for commands

doc/filters.texi

@@ -8632,6 +8632,10 @@ Limit the maximum change for each plane, default is 65535.
 If 0, plane will remain unchanged.
 @end table
 
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
 @section deflicker
 
 Remove temporal frame luminance variations.
@@ -8973,6 +8977,10 @@ Flags to local 3x3 coordinates maps like this:
     6 7 8
 @end table
 
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
 @section displace
 
 Displace pixels as indicated by second and third input stream.
@@ -10121,6 +10129,10 @@ Flags to local 3x3 coordinates maps like this:
     6 7 8
 @end table
 
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
 @section extractplanes
 
 Extract color channel components from input video stream into
@@ -12186,6 +12198,10 @@ Limit the maximum change for each plane, default is 65535.
 If 0, plane will remain unchanged.
 @end table
 
+@subsection Commands
+
+This filter supports the all above options as @ref{commands}.
+
 @section interlace
 
 Simple interlacing filter from progressive contents. This interleaves upper (or

libavfilter/vf_neighbor.c

@@ -353,7 +353,7 @@ static const AVFilterPad neighbor_outputs[] = {
 };
 
 #define OFFSET(x) offsetof(NContext, x)
-#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
 
 #define DEFINE_NEIGHBOR_FILTER(name_, description_)          \
 AVFILTER_DEFINE_CLASS(name_);                                \
@@ -368,6 +368,7 @@ AVFilter ff_vf_##name_ = {                                   \
     .outputs       = neighbor_outputs,                       \
     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC| \
                      AVFILTER_FLAG_SLICE_THREADS,            \
+    .process_command = ff_filter_process_command,            \
 }
 
 #if CONFIG_EROSION_FILTER