Overview

The node saves a snapshot in jpg format, along with the Pipeline metadata contained in that frame, as a files API object.

Files created by this node are also listed in the Console under the Deployment detail page.

Format of output

This node creates 2 files for every snapshot it saves:

Media file (JPEG format), named <node_name>-YYYY-MM-DDThhmmss.usZ.jpg. Ex. snapshot1-2023-01-20T083909.952Z.jpg. The timestamp in the file name is the creation timestamp. This file contains the media for the snapshot in jpg format.
Metadata file (JSON format) named <node_name>-YYYY-MM-DDThhmmss.usZ.jpg.json. Ex snapshot-2023-01-20T083909.952Z.jpg.json. This file contains the metadata for the frame contained in the media file in JSON format.

Inputs & Outputs

Inputs : 1, Media Format : Raw Video
Outputs : 1, Media Format: Raw Video
Output Metadata : None

Properties

Property	Value
`location`	Where to save snapshots & associated metadata. Options : `local` : Save to local disk, in the folder specified under `path` property. `lumeo_cloud` : Upload to Lumeo's cloud service. For this location, Lumeo will always create a files object for each snapshot. `s3` : Upload to a custom S3 bucket.
`path`	Path to save the snapshots, if `location` == `local`. If you change the defaults, ensure that the path is writable by `lumeod` user. If location is set to `lumeo_cloud` snapshots are temporarily stored at `/var/lib/lumeo/clip_upload` (till they are uploaded).
`max_edge_files`	Maximum number of files to keep on local disk, when `location` == `local`, for this specific node. Ignored when `location` == `lumeo_cloud`. If this property is not set, Lumeo will continue to save till the disk fills up. If it is set, Lumeo will save to local disk in a round robin manner (overwrite the 1st file once `max_edge_files` have been written).
`trigger`	Save a snapshot when this condition is met, subject to Trigger mode property below. The trigger expression must be a valid Dot-notation expression that operates on Pipeline Metadata and evaluates to `True` or `False`. See details here. ex. `nodes.annotate_line_counter1.lines.line1.total_objects_crossed_delta > 0`
`trigger_mode`	`Single` : Take a snapshot once every time the trigger condition is met (goes from False to True). `Exact` : Take a snapshot of every frame for as long as the condition is met.
`s3_endpoint`	AWS S3-compatible endpoint to upload to, excluding the bucket name. Used when `location` == `s3`. ex. `https://storage.googleapis.com` or `https://fra1.digitaloceanspaces.com` or `https://s3.us-east1.amazonaws.com`
`s3_region`	AWS S3-compatible endpoint Region. Used when `location` == `s3`. ex. `us` or `fra1`
`s3_bucket`	AWS S3-compatible bucket name. Used when `location` == `s3`. ex. `lumeo-data`
`s3_key_prefix`	Folder prefix within the AWS S3-compatible bucket that files will be created in. Skip trailing `/`s. Used when `location` == `s3`. ex. `production/test`
`s3_access_key_id`	S3 API Key ID with write access to the specified bucket. Used when `location` == `s3`. ex. `GOOGVMQE4RCI3Z2CYI4HSFHJ`
`s3_secret_access_key`	S3 API Key with write access to the specified bucket.

Metadata

Metadata Property	Description
None	None

Common Provider Configurations

Examples

Property	AWS	Digital Ocean	Wasabi	GCP
`s3_endpoint`	`https://s3.us-east-1.amazonaws.com`	`https://nyc3.digitaloceanspaces.com`	`https://s3.wasabisys.com`	`https://storage.googleapis.com`
`s3_region`	`us-east-1`	`nyc3`	`us-east-1`	`us-central1`
`s3_bucket`	`my-aws-bucket`	`my-do-bucket`	`my-wasabi-bucket`	`my-google-bucket`
`s3_key_prefix`	`my-folder`	`my-folder`	`my-folder`	`my-folder`
`s3_access_key_id`	`AKIAIOSFODNN7EXAMPLE`	`DO00QWERTYUIOPASDFGHJKLZXCVBNM`	`WASABI00QWERTYUIOPASDFGHJKLZXCVBNM`	`GOOG00QWERTYUIOPASDFGHJKLZXCVBNM`
`s3_secret_access_key`	`xxxxx`	`xxxxx`	`xxxxxx`	`xxxxxxx`

AWS Credentials

Create user
aws iam create-user --user-name <username>

Attach policy

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "s3:PutObject"
      ],
      "Resource": "arn:aws:s3:::<bucket-name>/*"
    },
    {
      "Effect": "Allow",
      "Action": "s3:ListBucket",
      "Resource": "arn:aws:s3:::<bucket-name>"
    }        
  ]
}

aws iam put-user-policy --user-name <username> --policy-name S3PutObjectPolicy --policy-document file://s3-put-policy.json

Create long lived access key for user and grab the credentials
aws iam create-access-key --user-name <username>