I'm doing some audio deliverables for a feature film's TV package. The spec sheet I'm working from says that all media has to be provided with an MD5 checksum.

I know how to compute MD5 checksums for files but is there a specific format for checksum's that's customary? Could I use the MD5 feature of mtree(1)? Or do you do a $FILENAME.md5 for each file? Or something else?

  • The spec should include how they want to receive the checksums. There is no industry standard. If the spec didn't include it, I would contact the studio. Aug 11, 2017 at 19:03
  • Can you give any examples of how you've done them in the past?
    – iluvcapra
    Aug 12, 2017 at 7:55
  • 1
    I never delivered to a destination that required it. I only know of one US broadcaster who asked for checksums and they required you use their software to package the files. I don't think DPP/AS-11 requires it and I couldn't find a requirement in Netflix's spec's for checksums, either. Aug 12, 2017 at 16:54
  • @MichaelLiebman Thanks I consider this answer complete.
    – iluvcapra
    Aug 12, 2017 at 19:53
  • Glad to help. I put that all in to an answer. Aug 12, 2017 at 20:51

1 Answer 1


There is no standard used by US broadcasters for how to format checksums. I've never delivered to a broadcaster that requires it, but I've mostly been involved in delivering commercials. DPP/AS-11 doesn't specify anything about checksums and neither does Netflix. I only know of one US broadcaster that does require checksums and they require using their proprietary software to build up the delivery package.

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