[pvrusb2] Audio/video sync (was re: Jumpy Video in Mythtv)

[Mark Goldberg]

On 7/22/07, Mike Isely <isely at isely.net> wrote:
> > > shutting down the computer (turning it off so it reloads the
> > > firmware), everything seems to work fine.
>
> A modprobe -r pvrusb2 and then power cycling the PVR USB2 device should
> be enough to clear everything.  Note that rebooting the computer without
> power cycling the PVR USB2 device does NOT necessarily cause the
> device's FX2 firmware to be loaded.  When the pvrusb2 driver initializes


I turned off power to everything.


> 24xxx model series device (if you don't know, it probably is), then the


It is a new 24XXX one.


> The best sure-fire way to completely reinitialize the device and to make
> sure that the driver is what you just built is this:
>
> 1. Disconnect the PVR USB2 device from its power.
>
> 2. modprobe -r pvrusb2.
>
> 3. Connect the PVR USB2 device to its power source.

I still have some occasional issues where it "messes up"

Sometimes the audio gets distorted. It happened on the Dr. Who recorded show
but was fine on two other shows recorded the same night. It seems that
stopping watching tv and coming back fixes this.

Very rarely it will mess up the video encoding where it drops frames
every few seconds, very repeatably. I'd estimate every 5 to 10
seconds, but I did not time it. I had to shut down the computer and
restart to fix that one.

I've still got to grab the firmware from the CD that came with the
unit, but I've had other things to do, so I won't complain about
anyone's vacation.

Thanks,

Mark