[mythtv-users] [SOLVED] ivtv Maximum bitrate

James Crow crow.jamesm at gmail.com
Wed Jun 23 11:42:51 UTC 2010


On Tue, Jun 22, 2010 at 10:40 AM, James Crow <crow.jamesm at gmail.com> wrote:
> On Tue, Jun 22, 2010 at 9:27 AM, George Mari
> <george_mythusers at mari1938.org> wrote:
> <snip>
>>
>> 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.
>
> I had already increased the mpeg buffers, but forgot about the vbi
> buffers. I now have this:
> options ivtv ivtv_first_minor=0 enc_mpg_buffers=32 enc_vbi_buffers=8
> enc_pcm_buffers=1280
> It multiplies the mpeg, vbi, and pcm default buffers by 4 .
>
> Thanks,
> James
>
I have now been recording for about 24 hours and have not seen any
errors in the system log. Unless anything further comes up I think
this problem has been solved.

Thanks for all the help.

James


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