I am basically using AVAssetExportSession and AVMutableVideoComposition to add my text overlay on top of the video and then compress the video. At the moment, when I compressed the video to AVAssetExportPresetMediumQuality, it also ruined the quality of the text overlay... I dont want this to happen. I just want to lower the quality on the video ONLY and keep the text overlay on top of the video sharp and not pixelated.
Thank You