<div style="font-family:arial,sans-serif;font-size:13px">I have a very odd situation with my MythTV 0.26 Mythbuntu 12.04 install. Video is rock solid using VDPAU High Quality, card is an eVGA GeForce GTX 650 Ti. However, often when going into commercial breaks, when commercials switch, and going back to the program from commercial I often get video/audio stuttering and the PrebufferEnoughFrames message in the frontend logs:</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">Nov 22 15:50:17 dvr mythlogserver: mythfrontend[3442]: N CoreContext mythplayer.cpp:2095 (PrebufferEnoughFrames) Player(5): Waited 103ms for video buffers AAAAAAALAAAfAA</div>
<div style="font-family:arial,sans-serif;font-size:13px">Nov 22 15:50:26 dvr mythlogserver: mythfrontend[3442]: I CoreContext mythpainter_ogl.cpp:62 (ClearCache) Clearing OpenGL painter cache.</div><div style="font-family:arial,sans-serif;font-size:13px">
Nov 22 15:56:30 dvr mythlogserver: mythfrontend[3442]: N CoreContext mythplayer.cpp:2095 (PrebufferEnoughFrames) Player(5): Waited 102ms for video buffers AAAAAfAAAALAAf</div><div style="font-family:arial,sans-serif;font-size:13px">
Nov 22 15:56:30 dvr mythlogserver: mythfrontend[3442]: N CoreContext mythplayer.cpp:2095 (PrebufferEnoughFrames) Player(5): Waited 204ms for video buffers AAAAAfAAAALAAf</div><div style="font-family:arial,sans-serif;font-size:13px">
Nov 22 15:56:30 dvr mythlogserver: mythfrontend[3442]: N CoreContext mythplayer.cpp:2095 (PrebufferEnoughFrames) Player(5): Waited 305ms for video buffers AAAAAfAAAALAAf</div><div style="font-family:arial,sans-serif;font-size:13px">
Nov 22 15:56:31 dvr mythlogserver: mythfrontend[3442]: N CoreContext mythplayer.cpp:2095 (PrebufferEnoughFrames) Player(5): Waited 407ms for video buffers AAAAAfAAAALAAf</div><div style="font-family:arial,sans-serif;font-size:13px">
Nov 22 15:56:31 dvr mythlogserver: mythfrontend[3442]: N CoreContext mythplayer.cpp:2095 (PrebufferEnoughFrames) Player(5): Waited 509ms for video buffers AAAAAfAAAALAAf</div><div style="font-family:arial,sans-serif;font-size:13px">
<br></div><div style="font-family:arial,sans-serif;font-size:13px">Again the program itself is almost always rock solid. It seems like some buffering occurs because the cable headend is switching streams (my amateur assessment).</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">I am using a Silicon Dust hdhomerun currently but had the same issues with the Hauppauge 2250 it replaced. I am playing back ClearQAM video from Time Warner Cable in NYC.</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">It does not seem to be CPU or disk related. CPU is generally near idle during video playback and video card barely breaks a sweat. Pausing for a second mitigates the issue but not a great long-term solution. Using other video profiles does not help and only seem to tax the CPU (Intel Q6600).</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">I've been Googling for solutions and trying just about everything for a week now but nothing solves it. Any advice/solutions greatly appreciated!</div>