I am trying to create a 4K video from image array of 4K images. Each image size is approximately 5Mb. Images are captured using AVCaptureSession Preset hd4K3840x2160.
As per my assumption, for image array with 4 images, the estimated 4K video output will be approximately 20Mb or more. I am able to create video with h264 codecs from image array as per the following thread -
https://stackoverflow.com/a/60149845/14999544
However, the output video gets converted to only 2Mb instead of expected 20Mb.
I did experiment around using proRes(found that it's designed for MacOS), Hevc codecs, changing values for AVVideoCompressionPropertiesKey, and updating kCVPixelBufferPixelFormatTypeKey but no success so far.
Question - What settings are required on AVAssetWriter to retain the pixels, size of the input image array and generate 4K videos?
Any help would be very much appreciated.
