This document describes a media processing project that uses a RESTful API with JSON to manipulate resources like workflows, actions, and jobs. It allows retrieving individual actions by ID, listing all workflows, and submitting new jobs. The project processes media by applying actions like crop, scale, title, encode, and more in defined workflows. It can be accessed programmatically from a browser and used to build client-side web applications.

1. Media Processing Project
King Chung Huang
Information Technologies
University of Calgary

2. Encode Filter
Crop
Trim
Scale Flip
Extract
Title
Adjust Append

3. Filter
Trim
Flip
Extract
Adjust Append
Crop Scale Title Encode

4. REST over HTTP with JSON API
• Workflows, actions, and jobs are all resources
• Use HTTP GET, PUT, POST, DELETE to manipulate the resources
• All content is JSON serialized
• Easily programmable directly from a browser environment
!
Build client-side web applications

5. REST over HTTP with JSON API
Retrieve an action
GET http://mpp.local/actions/ca.ucalgary.mpp.crop
{
“id”: “ca.ucalgary.mpp.crop”,
“title”: “Crop”,
“inputs”: […],
“outputs”: […],
…
}

6. REST over HTTP with JSON API
List all workflows
GET http://mpp.local/workflows/
{
“ids”: [
“ca.ucalgary.mpp.crop-for-ipod”,
“ca.ucalgary.mpp.encode-and-upload”,
“ca.ucalgary.mpp.make-cappuccino”
]
}

7. REST over HTTP with JSON API
Submit a job
POST http://mpp.local/jobs/96752C86
{
“id”: “96752C86”,
“workflow”: “ca.ucalgary.make-cappuccino”,
“inputs”: […]
}

8. Filter
Trim
Flip
Extract
Adjust Append
Crop Scale Title Encode

9. Crop Crop Crop
Scale Scale Scale
Title Title Title
Encode Encode Encode

10. More Information
King Chung Huang
kchuang@ucalgary.ca
Jim Tubman
jim.tubman@cybera.ca
Trevor Doerksen
trevord@mobovivo.com