Edit MP4 play speed using videoReader/Writer
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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.
2 个评论
Matt J
2020-6-25
Walter Roberson
2022-1-2
编辑：Matt J
2022-1-2
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.
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