They are currently passed to vf_scale using W:H:FLAGS syntax, while
vf_scale expects W:H:flags=FLAGS.
---
 libavfilter/avfiltergraph.c |    2 +-
 libavfilter/graphparser.c   |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c
index 04d9027..7ed1320 100644
--- a/libavfilter/avfiltergraph.c
+++ b/libavfilter/avfiltergraph.c
@@ -177,7 +177,7 @@ static int query_formats(AVFilterGraph *graph, AVClass 
*log_ctx)
                     /* couldn't merge format lists. auto-insert scale filter */
                     snprintf(inst_name, sizeof(inst_name), "auto-inserted 
scaler %d",
                              scaler_count++);
-                    snprintf(scale_args, sizeof(scale_args), "0:0:%s", 
graph->scale_sws_opts);
+                    snprintf(scale_args, sizeof(scale_args), "0:0:flags=%s", 
graph->scale_sws_opts);
                     if ((ret = avfilter_graph_create_filter(&scale, 
avfilter_get_by_name("scale"),
                                                             inst_name, 
scale_args, NULL, graph)) < 0)
                         return ret;
diff --git a/libavfilter/graphparser.c b/libavfilter/graphparser.c
index 90f2936..3ea0603 100644
--- a/libavfilter/graphparser.c
+++ b/libavfilter/graphparser.c
@@ -122,7 +122,7 @@ static int create_filter(AVFilterContext **filt_ctx, 
AVFilterGraph *ctx, int ind
     }
 
     if (!strcmp(filt_name, "scale") && args && !strstr(args, "flags")) {
-        snprintf(tmp_args, sizeof(tmp_args), "%s:%s",
+        snprintf(tmp_args, sizeof(tmp_args), "%s:flags=%s",
                  args, ctx->scale_sws_opts);
         args = tmp_args;
     }
-- 
1.7.9.1

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