[linux-dvb] Re: TT USB Budget cc discontinuity / lost sync.
peterw2k at yahoo.de
Wed Feb 23 11:30:04 CET 2005
--- Felix Domke <tmbinc at elitedvb.net> schrieb:
> Back in the days when I continued Holger's
> work, I implemented that muxpack stuff. It
> worked very fine, and i was even able to
> stream twovideo services at once (as long as
> they are below 90%*11Mbit-muxpack_overhead).
This means stream until about 9,5 MBit/s should work.
I doubt if any German TV station sends streams larger
than that. The largest I know of are the WDR regional
streams (WDR Dortmund/Aachen/etc) with about 6-8
> This was back on kernel 2.4. I didn't touched
> the driver since then, but started using it
> some time ago with 2.6, and had these problems
> as well, using same hardware.
So this does mean, when I switch to Kernel 2.4 on my
VDR machine, this problem will go away. Ok, I will try
it, but I'm not sure if it is simple because LinVDR
comes without compiler and I don't know how easy it is
to let it run with a 2.4 kernel...
> I'm not sure what changed since then, maybe
> something with the ISO urb scheduling goes
> wrong, i'm not that familiar with the linux
> usb stuff (anymore).
> Another thing i could think of would be the
> DSP's firmware. Iirc it was uploaded when the
> driver is loaded, is that still the case?
I'm not sure about that, I don't know the internas of
the driver/module. But if someone thinks he/she has
found the problem, I volunteer to test the code.
> But it's definitely not a hardware problem.
Thank for that information. I was thinking of buying a
new box for testing. So this is not needed anymore.
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