使用NodeJS和AWS S3将损坏/截断的mp4上载到S3桶

I'm using fs.readFile to read in a local mp4 file of around 700KB, and AWS SDK to load the file onto my S3 bucket. The process works, but the file is corrupt, presumably truncated because the size of the resulting file on S3 is only around 500KB. I'm using fs.readFile to read in a local mp4 fi