I had wondered about this myself a while ago.
So use to the underground scene of resolutions, it always seems strange when
looking at others methods of distribution's choice of rez. Although I think
Brian might be right about the aspect ratio
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Ian Forrester
Senior Backstage Producer
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________________________________
From: [email protected]
[mailto:[email protected]] On Behalf Of Brian Butterworth
Sent: 29 March 2010 08:38
To: [email protected]
Subject: Re: [backstage] Why are iPlayer SD programmes encoded at funky
resolutions?
Isn't it because of the difference in pixel shapes between TVs and
monitors?
On TV, 16:9 in 720x576 the pixels are 1:1.89, on a computer monitor the
pixels are 1:1. 832x468 is therefore the profile nearest the desired output of
1:1.89?
http://www.ukfree.tv/fullstory.php?storyid=1107051225
On 29 March 2010 01:19, Christopher Woods <[email protected]>
wrote:
I've noticed for a while that the HQ iPlayer stuff (not the HD)
is encoded
at 832x468. (recent example: Australian F1, or pretty much
every single high
quality iPlayer video you look at). No complaints about the
actual PQ, just
really curious as to the technical decisions that led to this
target output
res.
Is it some convoluted compromise to do with broadcast Pixel
Aspect Ratios
and square pixel conversion for H.264 encode or is there some
other reason?
Part of me always gets angsty not seeing 720x404 as the
resolution if I
measure whatever I'm watching ;) All insight appreciated...
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Brian Butterworth
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web: http://www.ukfree.tv - independent digital television and
switchover advice, since 2002
