DVR-MS, playback, was fine, now jerky ???

[rmorein]

After quite a few months, I have my machine back up with 1.3.11. Previously, DVR-MS playback had been flawless. Now, it's jerky. I understand that this is not intrinsic to GB-PVR; it's related to Directshow and drivers. I am looking for insight as to why previously flawless playback is now a bit like the stuttering found in Adobe Flash video.

System specs:
Asus M3A78-EMH-HDMI, 2.8ghz Athon 64x2, 4 gb ram, 780g motherboard graphics, XP/SP3, latest ATI 9.1 driver. No video scaling; the TV is a Philips 1920x1080 native. Graphics driver acceleration is "full." DRV-MS is from U.S. OTA at 15mb/s . There are no dropouts. Previously, VMR9 exclusive was found to be required for pristine performance, so that continues to be used.

Just discovered: If I play the DVR-MS files with WMP11, they play smoothly, but without sound, since AC3filter is required. Does this indicate a mux problem?

What changed?

[BigMoose]

The exact same thing happened to me - also a 780g mb and I recently upgraded to the 9.1 drivers.

[rmorein]

Did you try backing down the driver?

[BigMoose]

No, haven't done. I will possibly try that this evening.

[rmorein]

I will await your results.

[bdshaffer]

I would suggest the 8.11 driver.

[BigMoose]

9.1 was the first version that's ever given me the option of 1080p@50 in CCC so I am reluctant to go back. I also no longer get blue screen crashes from the H264 SD DVB-T channels from the Irish DTT which I used to get. So for the mo, I can live with dvr-ms being unplayable - I should convert all my recordings to something else really. Is there a good batch tool for converting a whole stack of recordings to divx (or similar)?

[rmorein]

I have replaced 9.1 with the Asus 8.57 beta driver on the M3A78-EMH HDMI download page, dated 12/2008/24. Standard def is now perfectly smooth. 24P film originated material is improved, but still a little jerky. Are there any specific optimizations for 24P ?

The previous Asus version, 8.471.0.0, bluescreened with the Microsoft opinion that the driver had gone into an infinite loop.

[rmorein]

On further examination, the problem persists with all hidef material. In windowed mode, I was able to check the CPU usage, which stays below 50%. The 780G chipset was designed to revolutionize the HT PC with an efficient mpg decoder. Sadly, the potential seems to have been blunted by a driver bug.
This machine is now relatively useless to me as a HT PC, yet it is not easy to reverse the situation, as the precise combination that formerly worked so well is not known.

Update: The Asus beta actually contains the same driver within a few minor revisions. So I went back to 9.1 I have installed the Nov. '08 DirectX package. This may have produced a slight improvement. On the whole, however, it's a 2nd rate experience.

[hoborg]

Do not use 9.1, totaly broken DXVA here under XP. For Ati HD3200 use catalyst 8.5, they are greatly stable, DXVA working correctly for MPEG2, H.264 and VC-1.

You can read a lot here: http://forum.team-mediaportal.com/codecs...saf-44614/