lavfi: add const to the AVFilter parameter of avfilter_graph_create_filter()

This function should never modify the filter.

1 files changed, 1 insertions, 1 deletions

diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index e7417213f1..c5efdb8374 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -1001,7 +1001,7 @@ int avfilter_graph_add_filter(AVFilterGraph *graphctx, AVFilterContext *filter);
  * @return a negative AVERROR error code in case of failure, a non
  * negative value otherwise
  */
-int avfilter_graph_create_filter(AVFilterContext **filt_ctx, AVFilter *filt,
+int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt,
                                  const char *name, const char *args, void *opaque,
                                  AVFilterGraph *graph_ctx);