diff --git a/apex/mediatranscoding.rc b/apex/mediatranscoding.rc
index fa4acf8..24306a2 100644
--- a/apex/mediatranscoding.rc
+++ b/apex/mediatranscoding.rc
@@ -6,5 +6,6 @@
     user media
     group media
     ioprio rt 4
-    task_profiles ProcessCapacityHigh HighPerformance
+    # Restrict to little cores only with system-background cpuset.
+    writepid /dev/cpuset/system-background/tasks
     disabled