Edit MP4 play speed using videoReader/Writer

I have an MP4 file of a narrated Powerpoint presentation and I would like to edit the file so that it plays back at a higher default speed. I am wondering if there were a way to do this using videoReader and videoWriter. One approach that I was considering was to read in all the frames with videoReader and then re-write the frames to a new file with a higher framerate setting. However, I'm not sure what I would need to do to make sure the audio track is correspondingly accelerated.

[Matt J]

Maybe a better question is, does VideoWriter even have the capability to add an audio track to an output MP4 file?

[Walter Roberson]

https://www.mathworks.com/help/vision/ref/vision.videofilewriter-system-object.html is the only function that can write combined audio and video to a file.