Im using AVAssetReader and AVAssetWriter to export videos because i need to add an emoji CIImage to each frame of video thround AVMutableVideoComposition and use cifilter to combine emoji to frame. Is there any way to upload emoji images directly to HDR or i need to creat an AVAsset width full emoji in frame and export with AVAssetExportSession ?

@DTS Engineer Thanks you but i need emoji brightness like hdr when both preview video in app or export so i need to create emoji CIImage with brightness like HDR and combine in frame of AVAsset using CIFilter.