Import Data from OTC

Your data is uploaded to, and securely stored in the Files section of Index where it is organized into folders and sub-folders. Importing your data into Encord is a multi-step process:

Set up an OTC integration.
Create an OTC integration in Encord.
Create a JSON or CSV.
Create a folder to store your data in Encord.
Upload your data to the folder.

See our OTC integration documentation for a detailed guide to setting up an integration.

Step 1: Setup OTC Integration

Before you can do anything with the Encord platform and cloud storage, you need to configure your cloud storage to work with Encord. Once the integration between Encord and your cloud storage is complete, you can then use your data in Encord.

In order to integrate with Open Telecom Cloud, you need to:

Create the account which accesses data in the Object Storage Service.
Give the account read access to the desired buckets by:
1. Creating a Custom Bucket Policy.
2. (Optional) If you have Cross-origin resource sharing (CORS) configured on your buckets, make sure that *.encord.com is given read access.
Create the integration by giving Encord access to that account’s credentials.

See our OTC integration documentation for a detailed guide to setting up an OTC integration.

Step 1: Create Account

Step 2: Give Read access

Step 3: Configure CORS

Step 2: Create Encord Integration

On the Encord platform enter the Access key ID and Secret access key, which should be located in the access key file, generated with the creation of the user. (if the access key has been misplaced, a new one can be created from the IAM User menu).

Optionally check the box to enable Strict client-only access, server-side media features will not be available if you would like Encord to sign URLs, but refrain from downloading any media files onto Encord servers. Read more about this feature here.

Finally, click the Create button at the bottom of the pop-up. The integration will now appear in the list of integrations in the ‘Integrations’ tab.

Step 3: Create Metadata Schema

If you are not using Index or Active, you do not need to create a Custom Metadata Schema, because you will not be using custom metadata.

Before importing your custom metadata to Encord, we recommend that you import a metadata schema. Encord uses metadata schemas to validate custom metadata uploaded to Encord and to instruct Index and Active how to display your metadata.

To handle your custom metadata schema across multiple teams within the same organization, we recommend using namespacing for metadata keys in the schema. This ensures that different teams can define and manage their own metadata schema without conflicts. For example, team A could use video.description, while team B could use audio.description. Another example could be TeamName.MetadataKey. This approach maintains clarity and avoids key collisions across departments.

Benefits of Using a Metadata Schema

Using a metadata schema provides several benefits:

Validation: Ensures that all custom metadata conforms to predefined data types, reducing errors during data import and processing.
Consistency: Maintains uniformity in data types across different datasets and projects, which simplifies data management and analysis.
Filtering and Sorting: Enhances the ability to filter and sort data efficiently in the Encord platform, enabling more accurate and quick data retrieval.

Metadata Schema Table

Metadata Schema keys support letters (a-z, A-Z), numbers (0-9), and blank spaces ( ), hyphens (-), underscores (_), and periods (.). Metadata schema keys are case sensitive.

If you are unsure about the type to assign to a metadata key, we recommend using varchar as a versatile default.

Use .add_scalar() to add a scalar key to your metadata schema.

Scalar Key	Description	Display Benefits
boolean	Binary data type with values “true” or “false”.	Filtering by binary values
datetime	ISO 8601 formatted date and time.	Filtering by time and date
number	Numeric data type supporting float values.	Filtering by numeric values
uuid	Customer specified unique identifier for a data unit.	Filtering by customer specified unique identifier
varchar	Textual data type. Formally `string`. `string` can be used as an alias for `varchar`, but we STRONGLY RECOMMEND that you use `varchar`.	Filtering by string.
text	Text data with unlimited length (example: transcripts for audio). Formally `long_string`. `long_string` can be used as an alias for `text`, but we STRONGLY RECOMMEND that you use `text`.	Storing and filtering large amounts of text.

Use add_enum and add_enum_options to add an enum and enum options to your metadata schema.

Key	Description	Display Benefits
enum	Enumerated type with predefined set of values.	Facilitates categorical filtering and data validation

Use add_embedding to add an embedding to your metadata schema.

Key	Description	Display Benefits
embedding	1 to 4096 for Index. 1 to 2000 for Active.	Filtering by embeddings, similarity search, 2D scatter plot visualization (Coming Soon)

Incorrectly specifying a data type in the schema can cause errors when filtering your data in Index or Active. If you encounter errors while filtering, verify your schema is correct. If your schema has errors, correct the errors, re-import the schema, and then re-sync your Active Project.

While still supported, we STRONGLY RECOMMEND that you use the latest metadata schema instructions.

ENUM Name	String Representation	Description	Display Benefits
NUMBER	number	Numeric data type supporting float values	Filtering by numeric values
STRING	string	Textual data type	Filtering by string
BOOLEAN	boolean	Binary data type with values “true” or “false”	Filtering by binary values
DATETIME	datetime	ISO 8601 formatted date and time	Filtering by time and date
ENUM	enum	Enumerated type with predefined set of values	Facilitates categorical filtering and data validation
EMBEDDING	embedding	1 to 4096 for Index. 1 to 2000 for Active.	Filtering by embeddings, similarity search, 2D scatter plot visualization (Coming Soon)
LONG_STRING	long_string	Text data with unlimited length (example: transcripts for audio)	Storing and filtering large amounts of text

Import Your Metadata Schema to Encord

Verify Your Schema

After importing your schema to Encord we recommend that you verify that the import is successful. Run the following code to verify your metadata schema imported and that the schema is correct.

Edit Schema Keys

You can change the data type of schema keys using the .set_scalar() method. The example below shows how to update the data type for multiple metadata fields.

Restore Schema Key
# Import dependencies
from encord import EncordUserClient
from encord.metadata_schema import MetadataSchema

SSH_PATH = "/Users/chris-encord/ssh-private-key.txt"

# Authenticate with Encord using the path to your private key
user_client: EncordUserClient = EncordUserClient.create_with_ssh_private_key(
    ssh_private_key_path=SSH_PATH
)

# Get your metadata schema
metadata_schema = user_client.metadata_schema()

# Edit various metadata fields
metadata_schema.set_scalar("metadata_1", data_type="number")
metadata_schema.set_scalar("metadata_2", data_type="boolean")
metadata_schema.set_scalar("metadata_3", data_type="boolean")

# Print the schema for verification
print(metadata_schema)

Delete Schema Keys

Schema key options cannot be deleted. Instead, we recommend creating new schema key options to meet your needs and phasing out any that are no longer required.

You can delete schema keys using the .delete() method.

There are two types of deletion: hard delete and soft delete. A hard delete permanently removes the key, making it impossible to restore. A soft delete allows you to restore the key later using the .restore_key() method.

The following examples show hard delete and soft deletion of a schema key called Fruit.

Restore Schema Keys

Keys that have been soft deleted can be restored using the .restore_key() method. The following example restores a schema key called Fruit.

Restore Schema Key
# Import dependencies
from encord import EncordUserClient
from encord.metadata_schema import MetadataSchema

SSH_PATH = "/Users/chris-encord/ssh-private-key.txt"

# Authenticate with Encord using the path to your private key
user_client: EncordUserClient = EncordUserClient.create_with_ssh_private_key(
    ssh_private_key_path=SSH_PATH
)

# Get your metadata schema
metadata_schema = user_client.metadata_schema()

metadata_schema.restore_key(k: "Fruit")

# Print the schema for verification
print(metadata_schema)

Step 4: Create JSON or CSV for import

All types of data (videos, images, image groups, image sequences, and DICOM) from a private cloud are added to a Dataset in the same way, by using a JSON or CSV file. The file includes links to all images, image groups, videos and DICOM files in your cloud storage.

For a list of supported file formats for each data type, go here

Encord supports file names up to 300 characters in length for any file or video for upload.

Create JSON file for import

For detailed information about the JSON file format used for import go here.

The information provided about each of the following data types is designed to get you up and running as quickly as possible without going too deeply into the why or how. Look at the template for each data type, then the examples, and adjust the examples to suit your needs.

If skip_duplicate_urls is set to true, all object URLs that exactly match existing images/videos in the dataset are skipped.

Videos

BEST PRACTICE: If you want to use Index or Active with your video data, we STRONGLY RECOMMEND using key frames, custom metadata, and custom embeddings. When specifying key frames set the sampling_rate to 0. This imports only the first frame and any key frames you specify in the video. This can significantly speed up the import of your data into Active and Index and help you to focus on only data you identify as critical.

The following table provides some guidance for the examples provided after the table.

Title	Description
Template	Provides the proper JSON format to import videos into Encord. This template provides examples from the most basic to the most complex.
Data	Imports videos into Encord. Why would I do this? You ONLY want to add labels and classifications to your data. You DO NOT want to use Index or Active.
Key Frames	Imports videos with an Encord title and specifies key frames (frames of interest) for Active and Index. Why would I do this? You ONLY want to see frames that you deem critical in Active and Index. You want to significantly improve the time to import videos into Active and Index. `config` is optional when specifying key frames for Active and Index: Specifying a `sampling_rate` of `0` only imports the first frame and all key frames of your video into Active and Index. `"config": { "sampling_rate": "<samples-per-second>", "keyframe_mode": "frame" or "seconds", },` If `config` is not specified, the `sampling_rate` is 1 frame per second, and the `keyframe_mode` is `frame`.
Custom Metadata	Imports videos with an Encord title, specifies key frames (frames of interest), and custom metadata for Active and Index. Why would I do this? Importing custom metadata allows you to filter your data in Active and Index to make it easier to find the data you want to focus on. This speeds up creating Collections and by extension Datasets. Specifying key frames means you ONLY want to see frames that you deem critical in Active and Index AND you want to significantly improve the time to import videos into Active and Index. `config` is optional when specifying key frames for Active and Index: Specifying a `sampling_rate` of `0` only imports the first frame and all key frames of your video into Active and Index. `"config": { "sampling_rate": "<samples-per-second>", "keyframe_mode": "frame" or "seconds", },` If `config` is not specified, the `sampling_rate` is 1 frame per second, and the `keyframe_mode` is `frame`.
Embeddings	Imports videos with an Encord title, specifies key frames (frames of interest), custom metadata, and custom embeddings for Active and Index. This example includes the following custom metadata types: boolean, varchar, datetime, uuid, number. Why would I do this? Importing custom embeddings allows you to use scatter plots to examine your data AND allows you to use similarity search and natural language searches. Index supports embedding dimensions 1 to 4096, while Active supports embedding dimensions 1 to 2000. Importing custom metadata allows you to filter your data in Active and Index to make it easier to find the data you want to focus on. This speeds up creating Collections and by extension Datasets. Specifying key frames means you ONLY want to see frames that you deem critical in Active and Index AND you want to significantly improve the time to import videos into Active and Index. `config` is optional when specifying custom embeddings for Active and Index: Specifying a `sampling_rate` of `0` only imports the first frame and all key frames of your video into Active and Index. `"config": { "sampling_rate": "<samples-per-second>", "keyframe_mode": "frame" or "seconds", },` If `config` is not specified, the `sampling_rate` is 1 frame per second, and the `keyframe_mode` is `frame`. Refer to our documentation for more information about Index with Custom Metadata, Index with Custom Embeddings, Active with Custom Metadata and Active with Custom Embeddings.
Video Metadata	Imports videos with the videoMetadata flag. When the videoMetadata flag is present in the JSON file, we directly use the supplied metadata without performing any additional validation, and do not store the file on our servers. To guarantee accurate labels, it is crucial that the metadata you provide is accurate.

DICOM

For detailed information about the JSON file format used for import go here.

Each dicom_series element can contain one or more DICOM series.
Each series requires a title and at least one object URL, as shown in the example below.
If skip_duplicate_urls is set to true, all object URLs exactly matching existing DICOM files in the dataset will be skipped.

Custom metadata is distinct from patient metadata, which is included in the .dcm file and does not have to be specific during the upload to Encord.

The following is an example JSON for uploading three DICOM series belonging to a study. Each title and object URL correspond to individual DICOM series.

The first series contains only a single object URL, as it is composed of a single file.
The second series contains 3 object URLs, as it is composed of three separate files.
The third series contains 2 object URLs, as it is composed of two separate files.

For each DICOM upload, an additional DicomSeries file is created. This file represents the series file-set. Only DicomSeries are displayed in the Encord application.

JSON for DICOM
{
  "dicom_series": [
    {
      "title": "Series-1",
      "objectUrl_0": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/study1-series1-file.dcm"
    },
    {
      "title": "Series-2",
      "objectUrl_0": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/study1-series2-file1.dcm",
      "objectUrl_1": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/study1-series2-file2.dcm",
      "objectUrl_2": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/study1-series2-file3.dcm",
    },
      {
      "title": "Series-3",
      "objectUrl_0": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/study1-series3-file1.dcm",
      "objectUrl_1": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/study1-series3-file2.dcm",
    }
  ],
  "skip_duplicate_urls": true
}

NIfTI

The following is an example JSON file for uploading two NIfTI files to Encord.

{
    "nifti": [
      {
        "title": "<file-1>",
        "objectUrl": "https://my-bucket/.../nifti-file1.nii"
      },
      {
        "title": "<file-2>",
        "objectUrl": "https://my-bucket/.../nifti-file2.nii.gz"
      }
    ],
    "skip_duplicate_urls": true
  }

You can upload multiple file types using a single JSON file. The example below shows 1 image, 2 videos, 2 image sequences, and 1 image group.

Multiple file types

{
  "images": [
    {
      "objectUrl": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/Image1.png"
    }
  ],
  "videos": [
    {
      "objectUrl": "https://encord-bucket.obs.eu-de.otc.t-systems.com/videos/Cooking.mp4"
    },
    {
      "objectUrl": "https://encord-bucket.obs.eu-de.otc.t-systems.com/videos/Oranges.mp4"
    }
  ],
  "image_groups": [
    {
      "title": "apple-samsung-light",
      "createVideo": true,
      "objectUrl_0": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/1+(32).jpg",
      "objectUrl_1": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/1+(33).jpg",
      "objectUrl_2": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/1+(34).jpg",
      "objectUrl_3": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/1+(35).jpg"
    },
    {
      "title": "apple-samsung-dark",
      "createVideo": true,
      "objectUrl_0": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/2+(32).jpg",
      "objectUrl_1": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/2+(33).jpg",
      "objectUrl_2": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/2+(34).jpg",
      "objectUrl_3": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/2+(35).jpg"
    }
  ],
  "image_groups": [
    {
      "title": "apple-ios-light",
      "createVideo": false,
      "objectUrl_0": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/3+(32).jpg",
      "objectUrl_1": "https://encord-bucket.obs.eu-de.otc.t-systems.com/images/3+(33).jpg"
    }
  ],
  "skip_duplicate_urls": true
}

Create CSV file for import

In the CSV file format, the column headers specify which type of data is being uploaded. You can add and single file format at a time, or combine multiple data types in a single CSV file.

Details for each data format are given in the sections below.

Encord supports up to 10,000 entries for upload in the CSV file.

Object URLs can’t contain whitespace.
For backwards compatibility reasons, a single column CSV is supported. A file with the single ObjectUrl column is interpreted as a request for video upload. If your objects are of a different type (for example, images), this error displays: “Expected a video, got a file of type XXX”.

Videos

A CSV file containing videos should contain two columns with the following mandatory column headings:
‘ObjectURL’ and ‘Video title’. All headings are case-insensitive.

The ‘ObjectURL’ column containing the objectUrl. This field is mandatory for each file, as it specifies the full URL of the video resource.
The ‘Video title’ column containing the video_title. If left blank, the original file name is used.

In the example below files 1, 2 and 4 will be assigned the names in the title column, while file 3 will keep its original file name.

ObjectUrl	Video title
path/to/storage-location/frame1.mp4	Video 1
path/to/storage-location/frame2.mp4	Video 2
path/to/storage-location/frame3.mp4
path/to/storage-location/frame4.mp4	Video 3

A CSV file containing single images should contain two columns with the following mandatory headings:
‘ObjectURL’ and ‘Image title’. All headings are case-insensitive.

The ‘ObjectURL’ column containing the objectUrl. This field is mandatory for each file, as it specifies the full URL of the image resource.
The ‘Image title’ column containing the image_title. If left blank, the original file name is used.

In the example below files 1, 2 and 4 will be assigned the names in the title column, while file 3 will keep its original file name.

ObjectUrl	Image title
path/to/storage-location/frame1.jpg	Image 1
path/to/storage-location/frame2.jpg	Image 2
path/to/storage-location/frame3.jpg
path/to/storage-location/frame4.jpg	Image 3

Image groups

A CSV file containing image groups should contain three columns with the following mandatory headings:
‘ObjectURL’, ‘Image group title’, and ‘Create video’. All three headings are case-insensitive.

The ‘ObjectURL’ column containing the objectUrl. This field is mandatory for each file, as it specifies the full URL of the resource.
The ‘Image group title’ column containing the image_group_title. This field is mandatory, as it determines which image group a file will be assigned to.

In the example below the first two URLs are grouped together into ‘Group 1’, while the following two files are grouped together into ‘Group 2’.

ObjectUrl	Image group title	Create video
path/to/storage-location/frame1.jpg	Group 1	false
path/to/storage-location/frame2.jpg	Group 1	false
path/to/storage-location/frame3.jpg	Group 2	false
path/to/storage-location/frame4.jpg	Group 2	false

Image groups do not require ‘write’ permissions.

Image sequences

A CSV file containing image sequences should contain three columns with the following mandatory headings: ‘ObjectURL’, ‘Image group title’, and ‘Create video’. All three headings are case-insensitive.

The ‘ObjectURL’ column containing the objectUrl. This field is mandatory for each file, as it specifies the full URL of the resource.
The ‘Image group title’ column containing the image_group_title. This field is mandatory, as it determines which image sequence a file will be assigned to. The dimensions of the image sequence are determined by the first file in the sequence.
The ‘Create video’ column. This can be left blank, as the default value is ‘true’.

In the example below the first two URLs are grouped together into ‘Sequence 1’, while the second two files are grouped together into ‘Sequence 2’.

ObjectUrl	Image group title	Create video
path/to/storage-location/frame1.jpg	Sequence 1	true
path/to/storage-location/frame2.jpg	Sequence 1	true
path/to/storage-location/frame3.jpg	Sequence 2	true
path/to/storage-location/frame4.jpg	Sequence 2	true

Image groups and image sequences are only distinguished by the presence of the ‘Create video’ column.

Image sequences require ‘write’ permissions against your storage bucket to save the compressed video.

A CSV file containing DICOM files should contain two columns with the following mandatory headings: ‘ObjectURL’ and ‘Dicom title’. Both headings are case-insensitive.

The ‘ObjectURL’ column containing the objectUrl. This field is mandatory for each file, as it specifies the full URL of the resource.
The ‘Series title’ column containing the dicom_title. When two files are given the same title they are grouped into the same DICOM series. If left blank, the original file name is used.

In the example below the first two files are grouped into ‘dicom series 1’, the next two files are grouped into ‘dicom series 2’, while the final file will remain separated as ‘dicom series 3’.

ObjectUrl	Series title
path/to/storage-location/frame1.dcm	dicom series 1
path/to/storage-location/frame2.dcm	dicom series 1
path/to/storage-location/frame3.dcm	dicom series 2
path/to/storage-location/frame4.dcm	dicom series 2
path/to/storage-location/frame5.dcm	dicom series 3

Multiple file types

You can upload multiple file types with a single CSV file by using a new header each time there is a change of file type. Three headings will be required if image sequences are included.

Since the ‘Create video’ column defaults to true all files that are not image sequences must contain the value false

The example below shows a CSV file for the following:

Two image sequences composed of 2 files each.
One image group composed of 2 files.
One single image.
One video.

ObjectUrl	Image group title	Create video
path/to/storage-location/frame1.jpg	Sequence 1	true
path/to/storage-location/frame2.jpg	Sequence 1	true
path/to/storage-location/frame3.jpg	Sequence 2	true
path/to/storage-location/frame4.jpg	Sequence 2	true
path/to/storage-location/frame5.jpg	Group 1	false
path/to/storage-location/frame6.jpg	Group 1	false
ObjectUrl	Image title	Create video
path/to/storage-location/frame1.jpg	Image 1	false
ObjectUrl	Image title	Create video
full/storage/path/video.mp4	Video 1	false

Step 5: Create a folder

Navigate to Files section of Index in the Encord platform.
Click + New folder. A dialog to create a new folder appears.

Give the folder a meaningful name and description.
Click Create to create the folder. The folder is listed in Files.

Step 6: Upload your data to the folder

We recommend uploading smaller batches of data: limit uploads to 100 videos and up to 1000 images at a time. Familiarize yourself with our limits and best practices for data import before uploading data to Encord.

Navigate to Files section of Index in the Encord platform.
Click + Upload files. A dialog appears.

Select the folder you created in step 4.
Click the Import from private cloud option.
Select the integration you created in step 2 to add your cloud data.

We recommend turning on the Ignore individual file errors feature. This ensures that individual file errors do not lead to the whole upload process being aborted.

Click Add JSON or CSV files to add a JSON or CSV file specifying cloud data that is to be added.

Get started

General

Index

Annotate

Active

Other

Import Data from OTC

Step 1: Setup OTC Integration

Step 2: Create Encord Integration

Step 3: Create Metadata Schema

Benefits of Using a Metadata Schema

Metadata Schema Table

Import Your Metadata Schema to Encord

Verify Your Schema

Edit Schema Keys

Delete Schema Keys

Restore Schema Keys

Step 4: Create JSON or CSV for import

Create JSON file for import

Videos

Audio Files

PDFs

Text Files

Single Images

Image groups

Image sequences

DICOM

NIfTI

Create CSV file for import

Videos

Image groups

Image sequences

Multiple file types

Step 5: Create a folder

Step 6: Upload your data to the folder

Get started

General

Index

Annotate

Active

Other

​Step 1: Setup OTC Integration

​Step 2: Create Encord Integration

​Step 3: Create Metadata Schema

​Benefits of Using a Metadata Schema

​Metadata Schema Table

​Import Your Metadata Schema to Encord

​Verify Your Schema

​Edit Schema Keys

​Delete Schema Keys

​Restore Schema Keys

​Step 4: Create JSON or CSV for import

​Create JSON file for import

​Create CSV file for import

Videos

Image groups

Image sequences

Multiple file types

​Step 5: Create a folder

​Step 6: Upload your data to the folder

Step 1: Setup OTC Integration

Step 2: Create Encord Integration

Step 3: Create Metadata Schema

Benefits of Using a Metadata Schema

Metadata Schema Table

Import Your Metadata Schema to Encord

Verify Your Schema

Edit Schema Keys

Delete Schema Keys

Restore Schema Keys

Step 4: Create JSON or CSV for import

Create JSON file for import

Create CSV file for import

Step 5: Create a folder

Step 6: Upload your data to the folder