CoreAudio input takes priority over FFmpeg on 10.14.x and older

Plugins/CoreAudio/CoreAudioDecoder.m

@@ -312,7 +312,10 @@ static SInt64 getSizeProc(void* clientData) {
 
 + (float)priority
 {
+    if (@available(macOS 10.15, *))
         return 1.0;
+    else
+        return 1.5;
 }
 
 - (NSDictionary *)properties

Plugins/FFMPEG/FFMPEGDecoder.m

@@ -589,7 +589,10 @@ int lockmgr_callback(void ** mutex, enum AVLockOp op)
 
 + (float)priority
 {
+    if (@available(macOS 10.15, *))
         return 1.5;
+    else
+        return 1.0;
 }