Answers.Body: <p>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. <a href="http://amwa.tv/projects/AS-11.shtml" rel="nofollow noreferrer">DPP/AS-11</a> doesn't specify anything about checksums and neither does <a href="https://backlothelp.netflix.com/hc/en-us/categories/202282037-SPECIFICATIONS-GUIDES" rel="nofollow noreferrer">Netflix</a>. I only know of one US broadcaster that does require checksums and they require using their proprietary software to build up the delivery package.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-08-12T20:51:14.820Z
Answers.LastActivityDate: 2017-08-12T20:51:14.820Z
Answers.UserDisplayName: Michael Liebman
Body: <p>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.</p>
  
  <p>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 <code>mtree(1)</code>? Or do you do a $FILENAME.md5 for each file? Or something else?</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-08-11T19:03:03.957Z
Comments.Text: 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.
Comments.UserDisplayName: Michael Liebman
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-08-12T07:55:41.377Z
Comments.Text: Can you give any examples of how you've done them in the past?
Comments.UserDisplayName: iluvcapra
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-08-12T16:54:50.640Z
Comments.Text: 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.
Comments.UserDisplayName: Michael Liebman
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-08-12T19:53:45.093Z
Comments.Text: @MichaelLiebman Thanks I consider this answer complete.
Comments.UserDisplayName: iluvcapra
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-08-12T20:51:38.693Z
Comments.Text: Glad to help. I put that all in to an answer.
Comments.UserDisplayName: Michael Liebman
Tags: <audio><broadcasting>
Title: Spec sheet requires checksums, How should these be formatted?
UserDisplayName: iluvcapra
ThreadText: # Spec sheet requires checksums, How should these be formatted?
  
  (Asked by: username_0 on 2017-08-11)
  
  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?
  
  **Tags:** audio, broadcasting
  
  > **Comments:**
  > **username_1**: 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.  
  > **username_0**: Can you give any examples of how you've done them in the past?  
  > **username_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.  
  > **username_0**: @username_1 Thanks I consider this answer complete.  
  > **username_1**: Glad to help. I put that all in to an answer.  
  
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  ## 1 answers
  
  ### Answer by username_1 on 2017-08-12. Score: 1 | Accepted answer
  
  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](http://amwa.tv/projects/AS-11.shtml) doesn't specify anything about checksums and neither does [Netflix](https://backlothelp.netflix.com/hc/en-us/categories/202282037-SPECIFICATIONS-GUIDES). 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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