Prevent crash if you forget to call FilterGraph::setup().

2 files changed, 3 insertions, 2 deletions

diff --git a/src/lib/filter_graph.cc b/src/lib/filter_graph.cc
index 2dbb2afc3..745d980a4 100644
--- a/src/lib/filter_graph.cc
+++ b/src/lib/filter_graph.cc
@@ -55,10 +55,11 @@ FilterGraph::setup(vector<Filter> const& filters)
 {
 	auto const filters_string = Filter::ffmpeg_string (filters);
 	if (filters.empty()) {
-		_copy = true;
 		return;
 	}
 
+	_copy = false;
+
 	_frame = av_frame_alloc ();
 
 	_graph = avfilter_graph_alloc();
diff --git a/src/lib/filter_graph.h b/src/lib/filter_graph.h
index 315aa7835..e474f851f 100644
--- a/src/lib/filter_graph.h
+++ b/src/lib/filter_graph.h
@@ -68,7 +68,7 @@ protected:
 
 	AVFilterGraph* _graph = nullptr;
 	/** true if this graph has no filters in, so it just copies stuff straight through */
-	bool _copy = false;
+	bool _copy = true;
 	AVFilterContext* _buffer_src_context = nullptr;
 	AVFilterContext* _buffer_sink_context = nullptr;
 	AVFrame* _frame = nullptr;