[linux-dvb] Strange problem on 1 channel only (UK)
jamesp at hisser.org
Mon Jan 9 16:31:08 CET 2006
Gavin Hamill wrote:
> The only thing different about BBC ONE is the bitrate - especially if
> you're using a USB interface you may experience problems - BBC ONE will
> sit at substantially more bits per second than any other channel on
> freeview :)
Aha - I thought it might be something like that, but mistakenly assumed
that all channels in the same mux would be at the same bitrate.
> Wow, you manage to get the whole TS over USB2 (I assume?) on other muxes
> and all channels are fine? I'm impressed :)
OK, I think I have made some progress. It seems my device was binding to
a USB 1.1 driver because I was autoloading ohci_hcd. I've fixed that and
it now appears as a "high speed" device rather than a "full speed" one.
I think "full speed" confused me at first :)
Now, I get the same issue but also see some screen corruption every few
seconds, but now it's across all channels. I'm beginning to think I do
need a better antenna (ok, a *real* antenna).
> If USB is not being the bottleneck, then perhaps the extra CPU grunt
> required to decode the stream combined with the extra load in dealing
> with the raw I/O is the problem?
I will look into this. The backend should have more than enough power
but then it's not doing any decoding is it. My frontend has a hardware
MPEG decoder though so should also be fine.
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
More information about the linux-dvb