In the What's new in AVFoundation video, the new AVCaption, AVAssetWriterCaptionAdaptor, AVCaptionConversionValidator, and AVAssetReaderOutputCaptionAdapter were announced, but looks like they're currently only for macOS. They would be very useful for iOS as well.
Thanks.
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What would be the range of color sample values in kernels for HDR (the example shown of invert for non-HDR video, what would be the correct code for HDR):
extern “C” float4 ColorInverter(coreimage::sample_t s, coreimage::destination dest) {
return float4(1.0 - s.r, 1.0 - s.g, 1.0 - s.b, 1.0);
}