1080p recording is zoomed :/

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darksaber73

Senior Member
Jul 13, 2010
77
17
It isn't a really terrible issue,but i can't help but keep wondering what's the reason for that zoom.
It wasn't solved on iphone 4 so i guess there's a "deep and technical" reason beyond that.
 

silverwolf0

Senior Member
Apr 10, 2007
169
14
Maybe the 1080p doesn't divide well into the 8 megapixel camera for easy conversion, so they make the viewable area slightly smaller so it is a nice multiple of the 1080p, because the processor can't handle the load otherwise. Shot in the dark.
 
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MikeyMike01

Inactive Recognized Developer
Jul 23, 2010
6,488
2,450
Could it be that you can't display a full 1920x1080 video in a 800x480 screen?

Sent from my Captivate.
 

MikeyMike01

Inactive Recognized Developer
Jul 23, 2010
6,488
2,450
For comparison purposes, my Captivate does this also. 720x480 is zoomed; 1280x720 is zoomed further.
 

Chad_Petree

Senior Member
Apr 2, 2009
3,315
486
1) Scale 1280x720 to 800x480, in which case you get an aspect ratio error of 1% which is more than acceptable.
2) Scale 1280x720 to 800x450 and pad the rest with black bars.

Is that what was asked?

450? did you watch the video? the problem seems to be only in 1080p and as far i know 720p and 1080p have the same aspect ratio
 
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kreoXDA

Senior Member
Nov 22, 2010
1,077
212
New York
not sure I understand?

The youtube video in the OP shows RECORDING, not playback, right?
When it records in 1080p, the screen shows a zoomed in picture.

This is because the phone cannot take raw 1920x1080 video stream from the camera, and at the same time be encoding it as 1080p and saving it to memory, and downscaling that raw 1920x1080 stream to 800x480 to display on screen. This phone is powerful, but not that powerful. Or maybe that youtube video was of not final software.
 

Rawat

Senior Member
Jun 7, 2010
765
542
London
Yes it's zoomed, and that's a hack to make it possible to record 1080p.

They've basically just cut off the pixels on the side, and are using 1920x1080 pixels from the centre of the camera's sensor.

This way, it doesn't have to process the "extra" pixels on the side, do pixel binning etc. The sensor is decent enough that 1080p still looks crisp at native res.
 

kreoXDA

Senior Member
Nov 22, 2010
1,077
212
New York
Yes it's zoomed, and that's a hack to make it possible to record 1080p.

They've basically just cut off the pixels on the side, and are using 1920x1080 pixels from the centre of the camera's sensor.

This way, it doesn't have to process the "extra" pixels on the side, do pixel binning etc. The sensor is decent enough that 1080p still looks crisp at native res.

Ahh that is what they were showing :) Makes sense, just like the iP4 then - thanks for the explanation.
 

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    Yes it's zoomed, and that's a hack to make it possible to record 1080p.

    They've basically just cut off the pixels on the side, and are using 1920x1080 pixels from the centre of the camera's sensor.

    This way, it doesn't have to process the "extra" pixels on the side, do pixel binning etc. The sensor is decent enough that 1080p still looks crisp at native res.
    1
    Maybe the 1080p doesn't divide well into the 8 megapixel camera for easy conversion, so they make the viewable area slightly smaller so it is a nice multiple of the 1080p, because the processor can't handle the load otherwise. Shot in the dark.
    1
    Its simply a lower viewing angle at higher resolutions, its not that uncommon on video recording devices.