Populate video duration to edx call

[rachellougee]

What are the relevant tickets?

https://github.com/mitodl/hq/issues/3402

Description (What does it do?)

Adding functionality to populating duration when posting video to open edx. Duration can be found in EncodeJob json response (see https://video-rc.odl.mit.edu/admin/ui/video/165/change/)

How can this be tested?

To test this, you will need a working OVS and open edx (tutur or devstack) instances locally. For OVS setup, follow README instruction, you may need to ask for AWS and CloudFront env variables from devops.

In your local edx instance. e.g. tutor

• Go to http://local.overhang.io/admin/oauth2_provider/application/ to add OVS application
  
  Make a note of Client id and Client secret
• Go to http://local.overhang.io/admin/oauth2_provider/accesstoken/ to add access token for OVS application created above
  
  Token can be populated with anything. Make a note of that

In your OVS instance

• Add a edx endpoint to http://ovs.odl.local:8089/admin/ui/edxendpoint/
  
  Access Token, Client id and Secret Key should match the ones you generated above in edx instance

• Add a collection to your local OVS http://ovs.odl.local:8089/admin/ui/collection/

  • populate Edx course id with course-v1:edX+DemoX+Demo_Course
  • select the edx endpoint you just added from above step

• Add video from dropbox from http://ovs.odl.local:8089/collections/

• Once video is uploaded to S3 successfully, you can view it from http://ovs.odl.local:8089/admin/ui/video/

• At this point, you should be able to see the video posting to your local edx instance http://local.overhang.io/admin/edxval/video/ with duration populated.

• Or you can run docker-compose run web ./manage.py add_hls_video_to_edx --video-file-id <YOUR VIDEO FILE ID>
  But I had no luck getting it posted to my tutor as I keep getting the following error, so maybe I am missing something.

HTTPConnectionPool(host='local.overhang.io', port=80): Max retries exceeded with url: /oauth2/access_token/ (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0xffff7e982b50>: Failed to establish a new connection: [Errno 111] Connection refused'))

I was able to modify post_video_to_edx to test the code I added to make sure duration is returned correctly.

[mbertrand]

LGTM, left some comments but they're pretty minor so approving it, feel free to make the suggested changes or leave as is. I did not test with a local edx instance but added a log statement to dump the JSON that would be sent there and the duration value was as expected.

[mbertrand]

A couple minor suggestions, feel free to take or leave: you don't necessarily have to run get_et_job, the EncodeJob object in the database should have that info already. But either way should work. Also, when assigning the duration from the encode job, might be good to add or 0 just in case it is null for some reason.

import ast
....

    duration = 0.0
    if submitted_encode_job:
        duration = ast.literal_eval(submitted_encode_job.message).get("Output", {}).get("Duration", 0) or 0 

[rachellougee]

Thank you. I've made the change for your suggestion.