[mythtv-users] New IVTV Changes

Brian Wood beww at beww.org
Thu Feb 22 15:29:38 UTC 2007

On Feb 22, 2007, at 8:15 AM, Steven Adeff wrote:

> On 2/22/07, Jeff volckaert <jvolckaert at gmail.com> wrote:
>>> Well, certainly on my system, which is running a PVR-150, MythTV  
>>> properly
>>> sets the capture size and enables VBI-CC correctly.
>>> Brett.
>> Adding the following...
>> /usr/bin/v4l2-ctl --set-ctrl=spatial_filter=4
>> /usr/bin/v4l2-ctl --set-ctrl=temporal_filter=4
>> ..to my /etc/rc.d/rc.local has greatly increased the smoothness of my
>> picture.  I did some comparisons last night with new and old Daily
>> Show recordings an the improvements are very noticeable.  The old
>> shows are sort of blocky when viewed very close.  The now shows are
>> smooth.  I'm sure I've been running without the filters for at  
>> least a
>> month or two.  Something seemed off with the picture quality and I
>> couldn't exactly tell what.
>> FWIW, I record at 720x480 with a 2.5M bitrate.  This way I can burn a
>> show to DVD with transcoding if I want to save it.
> do these filters affect the svideo input or just the tuners? you've
> got me intrigued.

Those controls are for the MPEG encoder and thus should affect any  
video encoded by the card regardless of which input it came from.

run v4l-ctl -l to see the value of all the settable parameters.

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