[FFmpeg-devel] [PATCH] lavfi/avfiltergraph: avoid to print "(null)" in the scale args

[Stefano Sabatini]

Fix parsing.
---
 libavfilter/avfiltergraph.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c
index ab37fae..d173775 100644
--- a/libavfilter/avfiltergraph.c
+++ b/libavfilter/avfiltergraph.c
@@ -358,7 +358,11 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
 
                     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);
+                    if (graph->scale_sws_opts)
+                        snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts);
+                    else
+                        snprintf(scale_args, sizeof(scale_args), "0:0");
+
                     if ((ret = avfilter_graph_create_filter(&convert, filter,
                                                             inst_name, scale_args, NULL,
                                                             graph)) < 0)
-- 
1.7.5.4