diff --git a/aegisub/src/libresrc/default_config.json b/aegisub/src/libresrc/default_config.json
index 1557cc2f5..077c47e2f 100644
--- a/aegisub/src/libresrc/default_config.json
+++ b/aegisub/src/libresrc/default_config.json
@@ -227,7 +227,7 @@
 				"Size" : 32
 			},
 			"FFmpegSource" : {
-				"Decoding Threads" : 1,
+				"Decoding Threads" : -1,
 				"Unsafe Seeking" : false
 			}
 		}