[mythtv-users] recording formats - standard cable

Brian Wood beww at beww.org
Fri Dec 15 20:33:51 UTC 2006

On Dec 15, 2006, at 1:22 PM, Brett Kosinski wrote:

> I have some confusion as to what format I should be recording in.
> I have a haupage pvr-150 and am recording straight out of the wall  
> cable ( 70 Channels no set top box. ).
> I do not have my myth box setup to display on a TV. Instead I just  
> display on my 20 inch ( 1680 x 1050 ) widescreen monitor.
> I have it setup to record 720 x 480 lines.  Im assuming that I am  
> getting some benefit from this setting recording from standard cable.
> Actually, given that you're pulling straight from coax, you could  
> probably reduce that to 640x480 or even 480x480.  But much of this  
> is quite subjective, so it's often worth it to play with the  
> settings until you get something you like.  Remember, generally  
> speaking, at a given bitrate, the higher the resolution, the lower  
> the encoding quality, as there's more frame to encode.  So if  
> there's no increase in detail going from 480x480 -> 720x480, your  
> encoding quality will end up suffering for no good reason.
> As an aside, there is one other major reason to capture at  
> 720x480:  it's the native resolution of a DVD.  Thus no scaling is  
> necessary if you plan to burn the content.

That is very true, and a useful point.

Have a look at :


Note that there is a plateau beyond which all you are doing is making  
your files larger.

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