[mythtv-users] ivtv Maximum bitrate

George Mari george_mythusers at mari1938.org
Tue Jun 22 13:27:31 UTC 2010


On 06/22/2010 07:37 AM, James Crow wrote:
 >
 > [deleted]
>
> I tried setting the governor back to ondemand and the up_threshold to
> 20. This resulted in a CPU freq of 1000.00 MHz. Or the slowest this
> CPU can clock. I may have to set the threshold all the way down to 10.
>
> Any ideas welcome.
>

Increase the size of your buffers for the ivtv driver.  I have the 
following line in the equivalent of modprobe.conf:

options ivtv enc_mpg_buffers=16 enc_vbi_buffers=8

This increases the encoder mpeg buffer size to 16MB from a default of 
4MB, and the VBI buffer size to 8MB from a default of 1MB.

Type "modinfo ivtv" to see all the options you can pass to the driver.

I would gradually increase the buffer size until the errors go away.


More information about the mythtv-users mailing list