Video Thumbnailer Using AWS Lambda

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A video thumbnail extractor using serverless functions. The video processing function is packaged as a Docker container.

Navigate to Running Container Images in AWS Lambda for a full walkthrough.

Prerequisites

To run this example, make sure Docker is installed and running.

Running the App

1. Create a new stack:

   pulumi stack init dev
   

2. Configure Pulumi to use an AWS region of your choice, for example:

   pulumi config set aws:region us-west-2
   

3. Restore NPM modules via npm install or yarn install.

4. Preview and deploy the app via pulumi up. The preview will take some time, as it builds a Docker container. A total of 16 resources are created.

   $ pulumi up
   Previewing update (dev)
   
   ...
   
   Do you want to perform this update? yes
   Updating (dev)
   
        Type                                  Name                          Status
   +   pulumi:pulumi:Stack                   video-thumbnailer-lambda-dev  created
   +   ├─ awsx:ecr:Repository                sampleapp                     created
   +   │  ├─ aws:ecr:Repository              sampleapp                     created
   +   │  └─ aws:ecr:LifecyclePolicy         sampleapp                     created
   +   ├─ aws:s3:Bucket                      bucket                        created
   +   │  ├─ aws:s3:BucketEventSubscription  onNewThumbnail                created
   +   │  │  └─ aws:lambda:Permission        onNewThumbnail                created
   +   │  ├─ aws:s3:BucketEventSubscription  onNewVideo                    created
   +   │  │  └─ aws:lambda:Permission        onNewVideo                    created
   +   │  └─ aws:s3:BucketNotification       onNewVideo                    created
   +   ├─ aws:iam:Role                       onNewThumbnail                created
   +   ├─ aws:iam:Role                       thumbnailerRole               created
   +   ├─ aws:lambda:Function                onNewThumbnail                created
   +   ├─ aws:iam:RolePolicyAttachment       onNewThumbnail-32be53a2       created
   +   ├─ aws:iam:RolePolicyAttachment       lambdaFullAccess              created
   +   └─ aws:lambda:Function                thumbnailer                   created
   
   Outputs:
       bucketName: "bucket-7c6b55a"
   
   Resources:
       + 16 created
   
   Duration: 1m41s
   

5. View the stack outputs:

   $ pulumi stack output
   Current stack outputs (1):
       OUTPUT                                           VALUE
       bucketName                                       bucket-7c6b55a
   

6. Upload a video, embedding the timestamp in the filename:

   $ aws s3 cp ./sample/cat.mp4 s3://$(pulumi stack output bucketName)/cat_00-01.mp4
   upload: sample/cat.mp4 to s3://***/cat_00-01.mp4
   

7. View the logs from both Lambda functions:

   $ pulumi logs -f
   Collecting logs for stack dev since 2020-12-02T08:58:43.000+01:00.
   
   2020-12-02T09:58:39.747+01:00[           thumbnailer-dbb2a35] START RequestId: 3ec2886e-e739-4764-be3b-a8e5a48a4986 Version: $LATEST
   2020-12-02T09:58:39.750+01:00[           thumbnailer-dbb2a35] 2020-12-02T08:58:39.748Z	3ec2886e-e739-4764-be3b-a8e5a48a4986	INFO	Video handler called
   2020-12-02T09:58:39.750+01:00[           thumbnailer-dbb2a35] 2020-12-02T08:58:39.750Z	3ec2886e-e739-4764-be3b-a8e5a48a4986	INFO	aws s3 cp s3://bucket-33b87c2/cat_00-01.mp4 /tmp/cat_00-01.mp4
   download: s3://bucket-33b87c2/cat_00-01.mp4 to ../../tmp/cat_00-01.mp4ed 256.0 KiB/666.5 KiB (1.2 MiB/s) with 1 file(s) remaining
   2020-12-02T09:58:53.068+01:00[           thumbnailer-dbb2a35] 2020-12-02T08:58:53.068Z	3ec2886e-e739-4764-be3b-a8e5a48a4986	INFO	ffmpeg -v error -i /tmp/cat_00-01.mp4 -ss 00:01 -vframes 1 -f image2 -an -y /tmp/cat.jpg
   2020-12-02T09:59:01.701+01:00[           thumbnailer-dbb2a35] 2020-12-02T08:59:01.701Z	3ec2886e-e739-4764-be3b-a8e5a48a4986	INFO	aws s3 cp /tmp/cat.jpg s3://bucket-33b87c2/cat.jpg
   upload: ../../tmp/cat.jpg to s3://bucket-33b87c2/cat.jpg          pleted 86.6 KiB/86.6 KiB (315.8 KiB/s) with 1 file(s) remaining
   2020-12-02T09:59:11.628+01:00[           thumbnailer-dbb2a35] 2020-12-02T08:59:11.627Z	3ec2886e-e739-4764-be3b-a8e5a48a4986	INFO	*** New thumbnail: file cat_00-01.mp4 was saved at 2020-12-02T08:58:33.845Z.
   2020-12-02T09:59:11.668+01:00[           thumbnailer-dbb2a35] END RequestId: 3ec2886e-e739-4764-be3b-a8e5a48a4986
   2020-12-02T09:59:11.668+01:00[           thumbnailer-dbb2a35] REPORT RequestId: 3ec2886e-e739-4764-be3b-a8e5a48a4986	Duration: 31920.84 ms	Billed Duration: 32733 ms	Memory Size: 128 MB	Max Memory Used: 128 MB	Init Duration: 811.55 ms
   2020-12-02T09:59:11.777+01:00[        onNewThumbnail-2f969e0] START RequestId: 07c13039-eccb-4e38-a3cf-c7fa11982b84 Version: $LATEST
   2020-12-02T09:59:11.788+01:00[        onNewThumbnail-2f969e0] 2020-12-02T08:59:11.782Z	07c13039-eccb-4e38-a3cf-c7fa11982b84	INFO	onNewThumbnail called
   2020-12-02T09:59:11.788+01:00[        onNewThumbnail-2f969e0] 2020-12-02T08:59:11.788Z	07c13039-eccb-4e38-a3cf-c7fa11982b84	INFO	*** New thumbnail: file cat.jpg was saved at 2020-12-02T08:59:06.333Z.
   2020-12-02T09:59:11.809+01:00[        onNewThumbnail-2f969e0] END RequestId: 07c13039-eccb-4e38-a3cf-c7fa11982b84
   2020-12-02T09:59:11.809+01:00[        onNewThumbnail-2f969e0] REPORT RequestId: 07c13039-eccb-4e38-a3cf-c7fa11982b84	Duration: 31.96 ms	Billed Duration: 32 ms	Memory Size: 128 MB	Max Memory Used: 65 MB	Init Duration: 171.22 ms
       ```
   

8. Download the key frame:

   $ aws s3 cp s3://$(pulumi stack output bucketName)/cat.jpg .
   download: s3://***/cat.jpg to ./cat.jpg
   

Clean up

To clean up the resources, you will first need to clear the contents of the bucket.

aws s3 rm s3://$(pulumi stack output bucketName) --recursive

Then, run pulumi destroy and answer the confirmation question at the prompt.