[mythtv-users] 0.25 Major AV sync problems

[Steven Ellis]

On Sat, June 9, 2012 12:25 am, Richard wrote:
> On 08/06/12 01:11, David Moore wrote:
>> Thanks for the confirmations that I'm not the only one seeing this
>> problem. FYI I have created a ticket #10797.
>
> I've done a little bit more testing but I can't say that I've managed to
> home in on anything in particular.
>
> I'm using an NVidia 8400GS card and sound output via the on-board Intel
> chipset.
>
> If I use the 'VDPAU Normal' profile, I get the problem.  If I switch it
> just 'Normal', everything seems to be ok (apart from not looking as nice).
>
> With audio set to SPDIF, I get the problem.  If I change audio to
> analogue, I don't.
>
> When I get the problem, the A/V sync value seems to stay pretty much
> fixed (maybe a little bit of jitter in the hundredths range), changing
> either the video or audio settings to stop the problem and it changes
> almost constantly.
>
> This is on my main box in the living room, running a fresh install of
> Mythbuntu 12.04.
>
> I cannot reproduce the problem on my desktop.  It doesn't matter whether
> what video or audio settings I use, everything stays in sync (I've no
> way of listening to digital audio on the desktop but the A/V sync value
> looks ok).  Both machines have the same NVidia card in them (at least,
> it's the same chipset), but the desktop machine does have slightly newer
> NVidia drivers.
>
> Here are the main differences:
>
> Mythbox
> -----------
> NVidia 295.40
> 82801JI (ICH10 Family) HD Audio Controller
> MythTV Version : v0.25.1
>
> Desktop
> -----------
> NVidia 295.53
> 6 Series/C200 Series Chipset Family High Definition Audio Controller
> MythTV Version : v0.25.1-1-g016db04
>
>
> Does this give anyone any ideas?
>


I've upgraded from MythTV 0.23 to 0.25 and I'm seeing the issue on
existing as well as new DVB-S MPEG-2 recordings with MP2 audio.

I'm running a GT220 card with an M2NPV-VM board and an Athlon X2 5050BE CPU.

I noticed that my de-interlacers were disabled during the upgrade so I've
turned Advanced 2x back on. Display is generally 1920x1080 50Hz unless I'm
watching US content.

All my audio is going out over SPDIF to my amp. I haven't setup audio over
HDMI yet with the new upgrade.

In order to get any reasonable sync I need to exit playback and re-enter
the file. Otherwise its a real mess.

Steve



--------------------------------------------
Steven Ellis - Technical Director
OpenMedia Limited - The Home of myPVR
email   - steven at openmedia.co.nz
website - http://www.openmedia.co.nz