[pvrusb2] dual pvr on linksys nslu2

[Mike Isely]

On Sat, 8 Oct 2005, Frans Meulenbroeks wrote:

> Dear all,
>
> I just managed to get two pvr's running simultaneously
> on linksys NSLU2.
>
> The thing runs like a charm.
> Kudo's go to Mike for making such a nice driver and
> for remotely diagnosing why ny two pvr system did not
> work immediately.
> It turned out that I was using a 1.1 hub. When I
> replaced it with a 2.0 hub things worked like a charm.
>
> Meanwhile we also discovered a flaw. In the latest
> firmware if you set the avg bitrate to 20 Mb and the
> peak one to 6 Mb the output looks lousy. In an earlier
> version it worked well.
>

Well I wouldn't really expect too much if you tell it to encode at a rate
higher than that which is allowed :-)

What we found out is that with the encoder firmware from
the pvrusb2_23_31351 driver package, that the encoder appears to deal with
this by acting as if the average rate is set to the peak rate.  For all
other driver package versions (which to date all have the same encoder
firmware image embedded), the encoder produces blocky corrupted
intermittent video when asked to do something "unreasonable" like this.

I'm noting this in doc/notes.txt for now, and I'm also spending time right
now trying all the various encoder controls to see what works and what
explodes, noting the results as I go.

  -Mike


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