[mythtv] mythtv commit: r8651 by danielk (Auto Aspect Ratio transcode)

Keith C mythtv at keithandjill.com
Fri Jan 20 04:39:45 UTC 2006

> On 1/19/06, Dave Just <justifiably at cwazy.co.uk> wrote:
>> Yes!   This is just the situation I had.  I have my low quality
>> transcode settings to rescale from usual capture resolution of
>> 720x576 down to 480x384.  Both multiples of 16.  But then I also
>> added the "Preserve aspect option" when it appeared.  The result was
>> that some of my captures which are at 4:3 instead of 16:9 got scaled
>> to a larger height, 392, not divisible by 16... and yes, the
>> transcoded files have fuzzy green borders in the top 1/6th or so.
>> I'm disabling the "preserve aspect ratio" for now again.  Maybe that
>> option needs tuning to enforce the standards.  (BTW, wouldn't it be
>> better to scale the width according to the desired height anyway?  I
>> think it's more useful to specify vertical resolution to match output
>> device)
> Glad to see I wasn't the only one with a strange color overlay at  
> the top.
> I also wondered if there is value in fixing the aspect ratio to the
> height instead of the width (or have the option between the two).

If you have a wide screen aspect ratio TV, you would like to fix  
height and calculate width.  If not, you want to fix width and  
calculate height.  Obviously, any calculated dimension should be  
divisible by 16.

Keith C

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