忽然想起一个问题：只有69万像素摄像头的iPod touch 4是如何拍摄1280＊720视频的，这个像素只能拍摄960＊720的视频啊？ 拍摄720P至少要92万像素吧？有高人知道没？

[naoqiushen]

手持70万的飘过

[lianghai]

哪里有数据说 iPod touch 4 的摄像头是 0.69M 像素的？官网的信息是这样的：
Video recording, HD (720p) up to 30 frames per second with audio; still photos (960 x 720) with back camera
http://www.apple.com/ipodtouch/specs.html
似乎这个 0.69M 是拿照片的分辨率乘出来的？

[LeiWeimu]

@lianghai Find some data here but I'm not sure about its source credibility: http://www.edepot.com/iphone.html

[LeiWeimu]

@regsvr32 @lianghai This explanation is interesting and somewhat convincing: "[t]he sensor actually is 1280x720 pixels, so it can create 720p video; that is a 16:9 format. But [for] still pictures, most still cameras take 4:3 pictures, and the iPod's camera does the same. A 4:3 picture with 720 pixels vertically is 960x720. That's 691,200 pixels, or 0.7 megapixels."
So it might be too arbitrary to say iPod touch 4th generation only has 0.69-megapixel rear camera.

[regsvr32]

@LeiWeimu 那么你是反对其摄像头是0.69mp的说法对吧？可是这一点似乎没有太多人质疑