iOS 10.3.2
I'd like to do monochrome (or single channel red) video recording, but it seems
iOS does not support this.
According to AVCaptureVideoDataOutput -availableVideoCVPixelFormatTypes, the
only supported pixel format types available for the iPad Pro in iOS 10.3.2 are:
'420v' - kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange 875704438
'420f' - kCVPixelFormatType_420YpCbCr8BiPlanarFullRange 875704422
'BGRA' - kCVPixelFormatType_32BGRA 1111970369
...but these can result in very large (~1GB) video files, and require
post-processing to remove the unneeded channel data.
Attempted use of other formats, such as kCVPixelFormatType_1Monochrome,
kCVPixelFormatType_32AlphaGray, kCVPixelFormatType_16Gray, or
kCVPixelFormatType_OneComponent8 result in an "Unsupported pixel format type"
exception at runtime.
Is there another way to accomplish this? iOS 11?
-Carl
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