在AVFoundation中进行帧间视频压缩的方法

I've created a process to generate video "slideshows" from collections of photographs and images in an application that I'm building. The process is functioning correctly, but creates unnecessarily large files given that any photographs included in the video repeat for 100 to 150 frames unchanged. I've included whatever compression I can find in AVFoundation, which mostly applies intra-frame techniques and tried to find more information on inter-frame compression in AVFoundation. Unfortunately, there are only a few references that I've been able to find and nothing that has let me get it to work.I've created a process to generate video "slide