complex_live_transcode: Replaced *copy with *null filters

complex_live_transcode.c

@@ -55,11 +55,11 @@ int main(int argc, char *argv[])
 					"[tmp][logo]%s,split=3[lowtmp][midtmp][high];"
 					"[lowtmp]scale=640:360[low];"
 					"[midtmp]scale=1280:720[mid]",
-					jstr(jlookup(src1, "afilter"), "acopy"),
-					jstr(jlookup(src2, "afilter"), "acopy"),
-					jstr(jlookup(argv[4], "afilter"), "acopy"),
-					jstr(jlookup(src1, "vfilter"), "copy"),
-					jstr(jlookup(src2, "vfilter"), "copy"),
+					jstr(jlookup(src1, "afilter"), "anull"),
+					jstr(jlookup(src2, "afilter"), "anull"),
+					jstr(jlookup(argv[4], "afilter"), "anull"),
+					jstr(jlookup(src1, "vfilter"), "null"),
+					jstr(jlookup(src2, "vfilter"), "null"),
 					jstr(jlookup(argv[4], "vmix"), "streamselect=map=0"),
 					getenv(WORKER_RAW), logo_expr
 				),