Need some insight on A/V sync problem

[observing]

I have GBPVR running on a 2.03 GHz machine and capturing ATSC channels with a Pinnacle 800e USB tuner. I use the device's drivers for decoding and the Cyberlink Mux (version 1307) for the BDA Multiplexer. A channel scan shows that I pick up 2 channels marked with (eng) and 10 channels marked with (000,(AC3)) or (eng,(AC3)). When I record shows, I find that the channels marked with (eng) stay in sync, but the other channels become noticeably out of sync after 15 minutes. I've played the mpg files on other machines using windows media player and see the same out-of-sync problem so I'm ruling out playback issues on the GBPVR machine.

After reading various forum messages about sync problems, it seems like the logs aren't much help. So, here's where I need the insight:

1. Is there a different chain of filters for processing (eng) type streams as there is for (AC3) type streams? If so, is there a way to determine what filters are used for each chain?

2. If there is just one filter chain, which is the more likely assumption?
- The computer just doesn't have enough horsepower to process AC3 streams
- One of the filters incorrectly processes AC3 streams

Thanks for any light that can be shed on this problem.

[sub]

Sync problems are pretty common with ATSC and the Cyberlink mux. Try the DVR-MS mux, it works much better with ATSC.

1. Is there a different chain of filters for processing (eng) type streams as there is for (AC3) type streams? If so, is there a way to determine what filters are used for each chain?

No there is no difference. They just use the same filters.

2. If there is just one filter chain, which is the more likely assumption?
- The computer just doesn't have enough horsepower to process AC3 streams
- One of the filters incorrectly processes AC3 streams

The Cyberlink mux is most likely doing something incorrectly when muxing the streams.

[observing]

I'm trying to stream it to a PCH A-100, so I'll need an alternative to DVR-MS. I suppose the TS Mux might be a solution if I can figure out how to produce a version that the PCH likes.

[observing]

Just to wrap up this thread, I did switch to the TS Mux and the A/V Sync problem is solved. The seek functions work perfectly, but it appears that fast forwarding has the same issues that have been described in other threads.