Cancel a Job

'If you wish to cancel a job that has not yet finished processing you may send a request (using any HTTP method) to https://app.zencoder.com/api/v2/jobs/1234/cancel. If cancellation succeeds you will receive a 204 No Content response. Only jobs that are in the waiting or processing state may be cancelled. If you attempt to cancel a job in any other state you will receive a 409 Conflict response.'