[mythtv-users] ivtv0 warning: encoder VBI: Couldn't find start of buffer within the first 256 bytes

matt stone stone.matthew at gmail.com
Thu Aug 9 11:49:14 UTC 2007


On 8/9/07, David Kramer <david at thekramers.net> wrote:
> I get this message hundreds of times all throughout /var/log/messages:
>
>   kernel: ivtv0 warning: encoder VBI: Couldn't find start of buffer
> within the first 256 bytes
>
> I also get:
>
> kernel: ivtv0: All encoder VBI stream buffers are full. Dropping data.
> kernel: ivtv0: Cause: the application is not reading fast enough.
>
> Is my CPU simply too slow?
> Is the hard drive too slow?
> Is there's some buffer that's too small that I can tweak?
>
<Snipped>
>
> ivtv0: Autodetected Hauppauge card (cx23415 based)
> ivtv0: Unreasonably low latency timer, setting to 64 (was 32)

You might want to read the wiki article on adjusting pci latency
http://www.mythtv.org/wiki/index.php/PCI_Latency

Cheers
Matt


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