diff --git a/ffplay.c b/ffplay.c
index 16a4258334..b6b185e00d 100644
--- a/ffplay.c
+++ b/ffplay.c
@@ -2671,6 +2671,11 @@ static void show_help(void)
 
 static void opt_input_file(const char *filename)
 {
+    if (input_filename) {
+        fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
+                filename, input_filename);
+        exit(1);
+    }
     if (!strcmp(filename, "-"))
         filename = "pipe:";
     input_filename = filename;