How to initiate a Media Conversion with Ruby in AWS Lambda?

Question

I'm trying to start a MediaConvert job with Ruby in AWS Lambda after a file has been uploaded to a bucket. The event kicks off fine, but I'm having trouble initiating the job.

I was trying to follow instructions from here to initiate the client: https://docs.aws.amazon.com/sdkforruby/api/Aws/MediaConvert/Client.html

And from here to kick off the job: https://docs.aws.amazon.com/sdk-for-ruby/v3/api/Aws/MediaConvert/Client.html#create_job-instance_method

# Event to kick off the media conversion: file uploaded to a bucket
sourceS3Bucket = event['Records'][0]['s3']['bucket']['name']
sourceS3Key = event['Records'][0]['s3']['object']['key']
sourceS3 = 's3://'+ sourceS3Bucket + '/' + sourceS3Key
jobMetadata['input'] = sourceS3

# Loading the MediaConvert settings
json_from_file = File.read('job.json')
jobSettings = JSON.parse(json_from_file)

# Initiating a client
client = Aws::MediaConvert::Client.new(
  access_key_id: ENV['ACCESS_KEY_ID'],
  secret_access_key: ENV['SECRET_ACCESS_KEY']
)

# Kicking off a job
response = client.create_job({
  Role: ENV['MediaConvertRole'],
  UserMetadata: jobMetadata,
  Settings: jobSettings
})

I'm getting this error:

Critical exception from handler
{
  "errorMessage": "uninitialized constant Aws::MediaConvert",
  "errorType": "Function<NameError>",
  "stackTrace": [
    "/var/task/convert.rb:38:in `rescue in call'",
    "/var/task/convert.rb:6:in `call'"
  ]
}

I'm unsure why the function is failing, do you have any clues please?

Answer 1

You need to install aws-sdk-mediaconvert gem. Add this to Gemfile:

gem 'aws-sdk-mediaconvert'

and run

bundle

If you still getting this error require it at the top of your MediaConvert job:

require 'aws-sdk-mediaconvert'