的Nexus 4相机preVIEW宽高比总是需要16x9的surfaceview？为什么 [英] Nexus 4 Camera preview aspect Ratio always requires 16x9 surfaceview? Why
问题描述
设备的Nexus 4 Android的版本：4.2.2
Device Nexus 4 Android ver: 4.2.2
希望其他人发现了这一点，并解释如何解决它....
Hoping someone else has found this and can explain how to resolve it....
的Nexus 4支持以下preVIEW尺寸： -
Nexus 4 supports the following preview sizes: -
W:1280 H:720 Ratio: 1.777777
W:800 H:480 Ratio: 1.6666666
W:768 H:432 Ratio: 1.7777778
W:720 H:480 Ratio: 1.5
W:640 H:480 Ratio: 1.3333334
W:576 H:432 Ratio: 1.3333334
W:480 H:320 Ratio: 1.5
W:384 H:288 Ratio: 1.3333334
W:352 H:288 Ratio: 1.2222222
W:320 H:240 Ratio: 1.3333334
W:240 H:160 Ratio: 1.5
W:176 H:144 Ratio: 1.2222222
myCamera.set previewSize（）设置他们，当我打电话myCamera.get previewSize（）我得到正确的一个，我设置的，但....如果我把我的面欣赏到尺寸相同，我的相机preVIEW然后我得到一个扩张的图象。例如，
myCamera.setPreviewSize() sets them, and when I call myCamera.getPreviewSize() I get the correct one that I set, BUT.... If I set my surface view to the same size as my camera preview then I get a stretched image. e.g.
setPreviewSize(640,480)
getPreviewSize -> I get 640,480
Surface view (640,480) -> Stretched image
只有当我把我的面，以16：9（1.77777）做我得到一个完美的形象。
Only if I set my Surface view to 16x9 (1.77777) do I get a perfect image.
Surface view (1280,720) -> Perfect image
这是我有这个问题的唯一设备。请能有人告知，如果有一个摄像头的设置，我失踪了全屏模式或东西是从工作停止这个。
This is the only device that I have this issue with. Please can someone advise if there is a camera setting I am missing for full screen mode or something that is stopping this from working.
在我漫长的寻找，我发现1等也涉及到这个问题的帖子，但没有回答，只是有点多的证据显示我的问题 <一href="http://stackoverflow.com/questions/14583757/nexus-4-android-camera-takepicture-does-not-callback-to-onpicturetaken">PictureCallback不叫除非使用supportedsizes [0]
In my long search I found 1 other post which relates also to this issue, but not an answer, just a bit more evidence of my problem PictureCallback not called unless using supportedsizes[0]
感谢
推荐答案
在了Nexus 4，有一个不幸的问题，即preVIEW宽高比和静止图像纵横比是绑在一起，即使你永远不要图片。如果它们不匹配，则两个中的一个被扭曲（通常preVIEW，因为它是较低的分辨率）。
On the Nexus 4, there's an unfortunate issue where the preview aspect ratio and the still picture aspect ratio are tied together, even if you never take a picture. If they don't match, one of the two gets distorted (typically preview, since it is the lower resolution).
。例如，640×480 preVIEW一个完整的800万像素图像尺寸（3264 x 2448）的N4应该不会造成绵延preVIEW。
If you want to use a 4:3 preview, configure the still picture size to be 4:3 as well, before starting preview. For example, 640x480 preview with a full 8MP picture size (3264 x 2448) on N4 should cause no stretching for preview.
使用<一个href="http://developer.android.com/reference/android/hardware/Camera.Parameters.html#setPictureSize%28int,%20int%29">Camera.Parameters.setPictureSize选择图片大小;可用尺寸的列表可以从<一读href="http://developer.android.com/reference/android/hardware/Camera.Parameters.html#getSupportedPictureSizes%28%29">Camera.Parameters.getSupportedPictureSizes.
Use Camera.Parameters.setPictureSize to select the picture size; the list of available sizes can be read from Camera.Parameters.getSupportedPictureSizes.
这篇关于的Nexus 4相机preVIEW宽高比总是需要16x9的surfaceview？为什么的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
