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Whats the best method to find the image resolution going to be captured using setting AVCaptureSessionPresetPhoto.
I am trying to find the resolution before capturing the image.
720
Here is the a table of all tested camera sessionPreset`s on devices, that support iOS 9
+-----------------------+--------------+---------------------------------+---------------+
| Device | Camera | AVCaptureSessionPreset | Resolution |
+-----------------------+--------------+---------------------------------+---------------+
| iPhone 4S | FRONT | | |
| | | AVCaptureSessionPresetPhoto | 640x480 |
| | | AVCaptureSessionPresetHigh | 640x480 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | not supported |
| | | AVCaptureSessionPreset1920x1080 | not supported |
| | BACK | | |
| | | AVCaptureSessionPresetPhoto | 3264x2448 |
| | | AVCaptureSessionPresetHigh | 1920x1080 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | 1920x1080 |
+-----------------------+--------------+---------------------------------+---------------+
| iPhone 5/5C/5S/6/6+ | | | |
| | FRONT | | |
| | | AVCaptureSessionPresetPhoto | 1280x960 |
| | | AVCaptureSessionPresetHigh | 1280x720 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | not supported |
| | BACK | | |
| | | AVCaptureSessionPresetPhoto | 3264x2448 |
| | | AVCaptureSessionPresetHigh | 1920x1080 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | 1920x1080 |
+-----------------------+--------------+---------------------------------+---------------+
| iPhone 6S/6S | | | |
| | FRONT camera | | |
| | | AVCaptureSessionPresetPhoto | 1280x960 |
| | | AVCaptureSessionPresetHigh | 1280x720 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | not supported |
| | BACK camera | | |
| | | AVCaptureSessionPresetPhoto | 4032x3024 |
| | | AVCaptureSessionPresetHigh | 1920x1080 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | 1920x1080 |
+-----------------------+--------------+---------------------------------+---------------+
| iPad 2 | | | |
| | FRONT | | |
| | | AVCaptureSessionPresetPhoto | 640x480 |
| | | AVCaptureSessionPresetHigh | 640x480 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | not supported |
| | | AVCaptureSessionPreset1920x1080 | not supported |
| | BACK | | |
| | | AVCaptureSessionPresetPhoto | 960x720 |
| | | AVCaptureSessionPresetHigh | 1280x720 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | not supported |
+-----------------------+--------------+---------------------------------+---------------+
| iPad 3 | | | |
| | FRONT | | |
| | | AVCaptureSessionPresetPhoto | 640x480 |
| | | AVCaptureSessionPresetHigh | 640x480 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | not supported |
| | | AVCaptureSessionPreset1920x1080 | not supported |
| | BACK | | |
| | | AVCaptureSessionPresetPhoto | 2592x1936 |
| | | AVCaptureSessionPresetHigh | 1920x1080 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | 1920x1080 |
+-----------------------+--------------+---------------------------------+---------------+
| iPad 4/Air | | | |
| iPad Mini 1/2/3 | | | |
| iPod 5G | | | |
| | FRONT | | |
| | | AVCaptureSessionPresetPhoto | 1280x960 |
| | | AVCaptureSessionPresetHigh | 1280x720 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | not supported |
| | BACK | | |
| | | AVCaptureSessionPresetPhoto | 2592x1936 |
| | | AVCaptureSessionPresetHigh | 1920x1080 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | 1920x1080 |
+-----------------------+--------------+---------------------------------+---------------+
| iPad Air 2 | | | |
| iPad Mini 4 | | | |
| iPad Pro | | | |
| | FRONT | | |
| | | AVCaptureSessionPresetPhoto | 1280x960 |
| | | AVCaptureSessionPresetHigh | 1280x720 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | not supported |
| | BACK | | |
| | | AVCaptureSessionPresetPhoto | 3264x2448 |
| | | AVCaptureSessionPresetHigh | 1920x1080 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | 1920x1080 |
+-----------------------+--------------+---------------------------------+---------------+
| iPod Touch 5 | | | |
| | FRONT | | |
| | | AVCaptureSessionPresetPhoto | 1280x960 |
| | | AVCaptureSessionPresetHigh | 1280x720 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | not supported |
| | BACK | | |
| | | AVCaptureSessionPresetPhoto | 2592x1936 |
| | | AVCaptureSessionPresetHigh | 1920x1080 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | 1920x1080 |
+-----------------------+--------------+---------------------------------+---------------+
| iPod Touch 6 | | | |
| | FRONT | | |
| | | AVCaptureSessionPresetPhoto | 1280x960 |
| | | AVCaptureSessionPresetHigh | 1280x720 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | not supported |
| | BACK | | |
| | | AVCaptureSessionPresetPhoto | 3264x2448 |
| | | AVCaptureSessionPresetHigh | 1920x1080 |
| | | AVCaptureSessionPresetMedium | 480x360 |
| | | AVCaptureSessionPresetLow | 192x144 |
| | | AVCaptureSessionPreset640x480 | 640x480 |
| | | AVCaptureSessionPreset1280x720 | 1280x720 |
| | | AVCaptureSessionPreset1920x1080 | 1920x1080 |
+-----------------------+--------------+---------------------------------+---------------+
CODE
+ (NSDictionary*) cameraResolutions {
NSString* deviceModel = [self deviceModel];
// iPhone 4S
if ([deviceModel isEqualToString:@"iPhone4,1"]) {
NSString* lFrontCam = @"640x480,480x360,192x144";
NSString* lBackCam = @"3264x2448,1920x1080,1280x720,640x480,480x360,192x144";
NSDictionary* lCamResolutions = @{@"front":lFrontCam,
@"back":lBackCam};
return lCamResolutions;
}
// iPhone 5/5C/5S/6/6+/iPod 6
else if ([deviceModel isEqualToString:@"iPhone5,1"]
|| [deviceModel isEqualToString:@"iPhone5,2"]
|| [deviceModel isEqualToString:@"iPhone5,3"]
|| [deviceModel isEqualToString:@"iPhone5,4"]
|| [deviceModel isEqualToString:@"iPhone6,1"]
|| [deviceModel isEqualToString:@"iPhone6,2"]
|| [deviceModel isEqualToString:@"iPhone7,1"]
|| [deviceModel isEqualToString:@"iPhone7,2"]
|| [deviceModel isEqualToString:@"iPod7,1"]) {
NSString* lFrontCam = @"1280x960,1280x720,640x480,480x360,192x144";
NSString* lBackCam = @"3264x2448,1920x1080,1280x720,640x480,480x360,192x144";
NSDictionary* lCamResolutions = @{@"front":lFrontCam,
@"back":lBackCam};
return lCamResolutions;
}
// iPhone 6S/6S+
else if ([deviceModel isEqualToString:@"iPhone8,1"]
|| [deviceModel isEqualToString:@"iPhone8,2"]) {
NSString* lFrontCam = @"1280x960,1280x720,640x480,480x360,192x144";
NSString* lBackCam = @"4032x3024,1920x1080,1280x720,640x480,480x360,192x144";
NSDictionary* lCamResolutions = @{@"front":lFrontCam,
@"back":lBackCam};
return lCamResolutions;
}
// iPad 2
else if ([deviceModel isEqualToString:@"iPad2,1"]
|| [deviceModel isEqualToString:@"iPad2,2"]
|| [deviceModel isEqualToString:@"iPad2,3"]
|| [deviceModel isEqualToString:@"iPad2,4"]) {
NSString* lFrontCam = @"640x480,480x360,192x144";
NSString* lBackCam = @"1280x720,960x720,480x360,192x144,640x480";
NSDictionary* lCamResolutions = @{@"front":lFrontCam,
@"back":lBackCam};
return lCamResolutions;
}
// iPad 3
else if ([deviceModel isEqualToString:@"iPad3,1"]
|| [deviceModel isEqualToString:@"iPad3,2"]
|| [deviceModel isEqualToString:@"iPad3,3"]) {
NSString* lFrontCam = @"640x480,480x360,192x144";
NSString* lBackCam = @"2592x1936,1920x1080,1280x720,640x480,480x360,192x144";
NSDictionary* lCamResolutions = @{@"front":lFrontCam,
@"back":lBackCam};
return lCamResolutions;
}
// iPad 4/Air/Mini/Mini 2/Mini 3/iPod 5G
else if ([deviceModel isEqualToString:@"iPad3,4"]
|| [deviceModel isEqualToString:@"iPad3,5"]
|| [deviceModel isEqualToString:@"iPad3,6"]
|| [deviceModel isEqualToString:@"iPad4,1"]
|| [deviceModel isEqualToString:@"iPad4,2"]
|| [deviceModel isEqualToString:@"iPad4,3"]
|| [deviceModel isEqualToString:@"iPad4,4"]
|| [deviceModel isEqualToString:@"iPad4,5"]
|| [deviceModel isEqualToString:@"iPad4,6"]
|| [deviceModel isEqualToString:@"iPad4,7"]
|| [deviceModel isEqualToString:@"iPad4,8"]
|| [deviceModel isEqualToString:@"iPod5,1"]) {
NSString* lFrontCam = @"1280x960,1280x720,640x480,480x360,192x144";
NSString* lBackCam = @"2592x1936,1920x1080,1280x720,640x480,480x360,192x144";
NSDictionary* lCamResolutions = @{@"front":lFrontCam,
@"back":lBackCam};
return lCamResolutions;
}
// iPad Air 2/Mini 4/Pro
else if ([deviceModel isEqualToString:@"iPad5,3"]
|| [deviceModel isEqualToString:@"iPad5,4"]) {
NSString* lFrontCam = @"1280x960,1280x720,640x480,480x360,192x144";
NSString* lBackCam = @"3264x2448,1920x1080,1280x720,640x480,480x360,192x144";
NSDictionary* lCamResolutions = @{@"front":lFrontCam,
@"back":lBackCam};
return lCamResolutions;
}
return nil;
}
With the function below, you can programmatically get the resolution from activeFormat before capture begins, though not before adding inputs and outputs:
https://developer.apple.com/library/ios/documentation/AVFoundation/Reference/AVCaptureDevice_Class/index.html#//apple_ref/occ/instp/AVCaptureDevice/activeFormat
private func getCaptureResolution() -> CGSize {
// Define default resolution
var resolution = CGSize(width: 0, height: 0)
// Get cur video device
let curVideoDevice = useBackCamera ? backCameraDevice : frontCameraDevice
// Set if video portrait orientation
let portraitOrientation = orientation == .Portrait || orientation == .PortraitUpsideDown
// Get video dimensions
if let formatDescription = curVideoDevice?.activeFormat.formatDescription {
let dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription)
resolution = CGSize(width: CGFloat(dimensions.width), height: CGFloat(dimensions.height))
if portraitOrientation {
resolution = CGSize(width: resolution.height, height: resolution.width)
}
}
// Return resolution
return resolution
}
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