From MythTV

Contents 1 Assumptions 2 Symptoms 3 Probable Cause 4 Note 5 Fix 6 Further Reading

Assumptions

• You are using separate frontend and backend machines.
• Your backend machine serves the location of your MPG files via NFS /exports
• Your frontend machine has NFS mounted the location of your MPG files

Symptoms

You are experiencing lots of "Prebuffering pause" events in your frontend playback of HD content.

Probable Cause

If your frontend has the video files accessible through NFS. As of about myth-0.18 the playback engine will attempt to use NFS to access mpg files before requesting a stream delivery.

If your NFS system has any hiccups in delivering the bytes from the mpg file then you will get a pause in video playback and a "Prebuffering pause" event in the logs.

Note

There are many reasons you may get prebuffering pauses including bad video setup, network problems, xvmc issues, etc. Please check the mythtv-users list to try and find the specific cause of your issue.

There it NOT just one fix for prebuffering pauses.

Fix

Remove the NFS mount on the frontend machine to force playback through mythstream delivery.

Further Reading

http://www.gossamer-threads.com/lists/mythtv/users/181123#181123