3 ms·

But that code that you linked to does not verify that the file is mp4, moreover, mp4Sig call is commented out.

• anonfunction 11y ago
  It verifies that the beginning of a file is mp4 format. I'm actually running go 1.6 which does have the mp4 sniffing enabled.
  • IceyEC 11y ago
    I was under the impression than MP4 could have all of its format specific headers at the end of the file just as well as the beginning according to the spec.
    • anonfunction 11y ago
      That is correct, however the beginning of the file does have a signature: https://mimesniff.spec.whatwg.org/#signature-for-mp4 https://mimesniff.spec.whatwg.org/#signature-for-mp4