avfilter/vf_libopencv: Use formats list instead of query function

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavfilter/vf_libopencv.c

@@ -64,14 +64,6 @@ static void fill_frame_from_iplimage(AVFrame *frame, const IplImage *img, enum A
     frame->data[0]     = img->imageData;
 }
 
-static int query_formats(AVFilterContext *ctx)
-{
-    static const enum AVPixelFormat pix_fmts[] = {
-        AV_PIX_FMT_BGR24, AV_PIX_FMT_BGRA, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE
-    };
-    return ff_set_common_formats_from_list(ctx, pix_fmts);
-}
-
 typedef struct OCVContext {
     const AVClass *class;
     char *name;
@@ -431,5 +423,5 @@ const AVFilter ff_vf_ocv = {
     .uninit        = uninit,
     FILTER_INPUTS(avfilter_vf_ocv_inputs),
     FILTER_OUTPUTS(avfilter_vf_ocv_outputs),
-    FILTER_QUERY_FUNC(query_formats),
+    FILTER_PIXFMTS(AV_PIX_FMT_BGR24, AV_PIX_FMT_BGRA, AV_PIX_FMT_GRAY8),
 };