Index: libs/libmythtv/RingBuffer.cpp
===================================================================
--- libs/libmythtv/RingBuffer.cpp	(revision 8442)
+++ libs/libmythtv/RingBuffer.cpp	(working copy)
@@ -433,7 +433,7 @@
     wantseek       = false;
     readsallowed   = false;
     fill_min       = 1;
-    readblocksize  = (estbitrate > 12000) ? 256000 : 128000;
+    readblocksize  = (estbitrate > 12000) ? 512000 : 128000;
 
 #if 1
     fill_threshold = 0;