How to capture images in 16:9

[pcm2a]

Can you point me in the right direction on how to set the aspect ratio for capturing an image with Camera2? The equivalent of setPictureSize on Camera1. I would like to do something similar to what we did with videos and allow taking photos in 4:3 or 16:9. Currently with a full screen preview the captured image is 4:3.

[pcm2a]

I figured this out and will update it to be similar to videos, allowing for Max 4:3 or Max 16:9.

val largestPicture = pictureSizes.sizes(AspectRatio.Ratio16x9).last()

[pcm2a]

I finally figured it out, no code changes needed. The below setting, put in the camera opened listener seems to do the trick.

camera.addCameraOpenedListener {
   camera.aspectRatio = AspectRatio.Ratio16x9
 }

[pvasa]

Not necessarily from opened listener. It can be set once the view is created using

camera.aspectRatio = AspectRatio.of(4, 3) // any valid aspect ratio

Also all supported aspect ratios can be found in camera.supportedAspectRatios

[pcm2a]

I'll give that a shot also and report back. I tried setting app:aspectRatio="16:9" in the layout file but that seemed to give an error, maybe only works from the class file. Thanks for all the active development you are putting in to this project!

[pcm2a]

Reopening to make sure I understand how 16:9 photos are supposed to be captured. The only way that seems to work good is in the opened listener.

[pvasa]

@pcm2a just found out one of the changes made recently broke this functionality. In CameraView.kt. Changing config.aspectRatio.observeForever {..} to config.aspectRatio.observe(camera) {..} will fix it.

This change will make sure aspectRatio value specified in xml is only emitted and processed once camera is correctly initialized to a point where it can validate the aspectRatio and set preview based on it. I will push a fix right now.

[pvasa]

With #134, one can specify the aspect ratio in xml directly like app:aspectRatio="16:9" and the camera preview will be initialized in that aspect ratio. Even the pictures will be taken in that aspect ratio.

[pcm2a]

Setting 16:9 in the xml is now working.