avfilter/vf_scale: strip metadata when changing colorspace

This is no longer relevant after a change in color space.

libavfilter/vf_scale.c

@@ -868,6 +868,18 @@ scale:
     if (scale->out_transfer != -1)
         out->color_trc = scale->out_transfer;
 
+    if (in->color_primaries != out->color_primaries ||
+        in->color_trc != out->color_trc)
+    {
+        av_frame_remove_side_data(out, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA);
+        av_frame_remove_side_data(out, AV_FRAME_DATA_DYNAMIC_HDR_PLUS);
+        av_frame_remove_side_data(out, AV_FRAME_DATA_DYNAMIC_HDR_VIVID);
+        av_frame_remove_side_data(out, AV_FRAME_DATA_CONTENT_LIGHT_LEVEL);
+        av_frame_remove_side_data(out, AV_FRAME_DATA_ICC_PROFILE);
+        av_frame_remove_side_data(out, AV_FRAME_DATA_DOVI_METADATA);
+        av_frame_remove_side_data(out, AV_FRAME_DATA_DOVI_RPU_BUFFER);
+    }
+
     av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
               (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
               (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,