Speech to text containers with Docker

The Speech to text container transcribes real-time speech or batch audio recordings with intermediate results. In this article, you learn how to download, install, and run a speech to text container.

For more information about prerequisites, validating that a container is running, running multiple containers on the same host, and running disconnected containers, see Install and run Speech containers with Docker.

Container images

The Speech to text container image for all supported versions and locales can be found on the Microsoft Container Registry (MCR) syndicate. It resides within the azure-cognitive-services/speechservices/ repository and is named speech-to-text.

The fully qualified container image name is, mcr.microsoft.com/azure-cognitive-services/speechservices/speech-to-text. Either append a specific version or append :latest to get the most recent version.

Version	Path
Latest	mcr.microsoft.com/azure-cognitive-services/speechservices/speech-to-text:latest The latest tag pulls the latest image for the en-US locale.
4.10.0	mcr.microsoft.com/azure-cognitive-services/speechservices/speech-to-text:4.10.0-amd64-mr-in

All tags, except for latest, are in the following format and are case sensitive:

<major>.<minor>.<patch>-<platform>-<locale>-<prerelease>

The tags are also available in JSON format for your convenience. The body includes the container path and list of tags. The tags aren't sorted by version, but "latest" is always included at the end of the list as shown in this snippet:

{
  "name": "azure-cognitive-services/speechservices/speech-to-text",
  "tags": [
    <--redacted for brevity-->    
    "4.10.0-amd64-sw-tz",
    "4.10.0-amd64-ta-in",
    "4.10.0-amd64-th-th",
    "4.10.0-amd64-tr-tr",
    "4.10.0-amd64-vi-vn",
    "4.10.0-amd64-wuu-cn",
    "4.10.0-amd64-yue-cn",
    "4.10.0-amd64-zh-cn",
    "4.10.0-amd64-zh-cn-sichuan",
    "4.10.0-amd64-zh-hk",
    "4.10.0-amd64-zh-tw",
    "4.10.0-amd64-zu-za",
    "latest"
  ]
}

Get the container image with docker pull

You need the prerequisites including required hardware. Also see the recommended allocation of resources for each Speech container.

Use the docker pull command to download a container image from Microsoft Container Registry:

docker pull mcr.microsoft.com/azure-cognitive-services/speechservices/speech-to-text:latest

Important

The latest tag pulls the latest image for the en-US locale. For additional versions and locales, see speech to text container images.

Run the container with docker run

Use the docker run command to run the container.

Speech to text

The following table represents the various docker run parameters and their corresponding descriptions:

Parameter	Description
{ENDPOINT_URI}	The endpoint is required for metering and billing. For more information, see billing arguments.
{API_KEY}	The API key is required. For more information, see billing arguments.

When you run the speech to text container, configure the port, memory, and CPU according to the speech to text container requirements and recommendations.

Here's an example docker run command with placeholder values. You must specify the ENDPOINT_URI and API_KEY values:

docker run --rm -it -p 5000:5000 --memory 8g --cpus 4 \
mcr.microsoft.com/azure-cognitive-services/speechservices/speech-to-text \
Eula=accept \
Billing={ENDPOINT_URI} \
ApiKey={API_KEY}

This command:

• Runs a speech-to-text container from the container image.
• Allocates 4 CPU cores and 8 GB of memory.
• Exposes TCP port 5000 and allocates a pseudo-TTY for the container.
• Automatically removes the container after it exits. The container image is still available on the host computer.

Disconnected speech to text

To run disconnected containers (not connected to the internet), you must submit this request form and wait for approval. For more information about applying and purchasing a commitment plan to use containers in disconnected environments, see Use containers in disconnected environments in the Azure AI services documentation.

If you're approved to run the container disconnected from the internet, the following example shows the formatting of the docker run command to use, with placeholder values. Replace these placeholder values with your own values.

The DownloadLicense=True parameter in your docker run command downloads a license file to enable your Docker container to run when it isn't connected to the internet. It also contains an expiration date, after which the license file is invalid to run the container. You can only use a license file with the appropriate container that you're approved for. For example, you can't use a license file for a speech-to-text container with a neural-text-to-speech container.

Placeholder	Description
{IMAGE}	The container image you want to use. For example: mcr.microsoft.com/azure-cognitive-services/speech-to-text:latest
{LICENSE_MOUNT}	The path where the license is downloaded, and mounted. For example: /host/license:/path/to/license/directory
{ENDPOINT_URI}	The endpoint for authenticating your service request. You can find it on your resource's Key and endpoint page, on the Azure portal. For example: https://<your-resource-name>.cognitiveservices.azure.com
{API_KEY}	The key for your Speech resource. You can find it on your resource's Key and endpoint page, on the Azure portal.
{CONTAINER_LICENSE_DIRECTORY}	Location of the license folder on the container's local filesystem. For example: /path/to/license/directory

docker run --rm -it -p 5000:5000 \ 
-v {LICENSE_MOUNT} \
{IMAGE} \
eula=accept \
billing={ENDPOINT_URI} \
apikey={API_KEY} \
DownloadLicense=True \
Mounts:License={CONTAINER_LICENSE_DIRECTORY} 

Once the license file is downloaded, you can run the container in a disconnected environment. The following example shows the formatting of the docker run command you use, with placeholder values. Replace these placeholder values with your own values.

Wherever the container is run, the license file must be mounted to the container and the location of the license folder on the container's local filesystem must be specified with Mounts:License=. An output mount must also be specified so that billing usage records can be written.

Placeholder	Value	Format or example
{IMAGE}	The container image you want to use. For example: mcr.microsoft.com/azure-cognitive-services/speech-to-text:latest
{MEMORY_SIZE}	The appropriate size of memory to allocate for your container. For example: 4g
{NUMBER_CPUS}	The appropriate number of CPUs to allocate for your container. For example: 4
{LICENSE_MOUNT}	The path where the license is located and mounted. For example: /host/license:/path/to/license/directory
{OUTPUT_PATH}	The output path for logging. For example: /host/output:/path/to/output/directory For more information, see usage records in the Azure AI services documentation.
{CONTAINER_LICENSE_DIRECTORY}	Location of the license folder on the container's local filesystem. For example: /path/to/license/directory
{CONTAINER_OUTPUT_DIRECTORY}	Location of the output folder on the container's local filesystem. For example: /path/to/output/directory

docker run --rm -it -p 5000:5000 --memory {MEMORY_SIZE} --cpus {NUMBER_CPUS} \ 
-v {LICENSE_MOUNT} \ 
-v {OUTPUT_PATH} \
{IMAGE} \
eula=accept \
Mounts:License={CONTAINER_LICENSE_DIRECTORY}
Mounts:Output={CONTAINER_OUTPUT_DIRECTORY}

Speech containers provide a default directory for writing the license file and billing log at runtime. The default directories are /license and /output respectively.

When you're mounting these directories to the container with the docker run -v command, make sure the local machine directory is set ownership to user:group nonroot:nonroot before running the container.

Here's a sample command to set file/directory ownership.

sudo chown -R nonroot:nonroot <YOUR_LOCAL_MACHINE_PATH_1> <YOUR_LOCAL_MACHINE_PATH_2> ...

For more information about docker run with Speech containers, see Install and run Speech containers with Docker.

Use the container

Speech containers provide websocket-based query endpoint APIs that are accessed through the Speech SDK and Speech CLI. By default, the Speech SDK and Speech CLI use the public Speech service. To use the container, you need to change the initialization method.

Important

When you use the Speech service with containers, be sure to use host authentication. If you configure the key and region, requests will go to the public Speech service. Results from the Speech service might not be what you expect. Requests from disconnected containers will fail.

Instead of using this Azure-cloud initialization config:

var config = SpeechConfig.FromSubscription(...);

Use this config with the container host:

var config = SpeechConfig.FromHost(
    new Uri("ws://localhost:5000"));

Instead of using this Azure-cloud initialization config:

auto speechConfig = SpeechConfig::FromSubscription(...);

Use this config with the container host:

auto speechConfig = SpeechConfig::FromHost("ws://localhost:5000");

Instead of using this Azure-cloud initialization config:

speechConfig, err := speech.NewSpeechConfigFromSubscription(...)

Use this config with the container host:

speechConfig, err := speech.NewSpeechConfigFromHost("ws://localhost:5000")

Instead of using this Azure-cloud initialization config:

SpeechConfig speechConfig = SpeechConfig.fromSubscription(...);

Use this config with the container host:

SpeechConfig speechConfig = SpeechConfig.fromHost("ws://localhost:5000");

Instead of using this Azure-cloud initialization config:

const speechConfig = sdk.SpeechConfig.fromSubscription(...);

Use this config with the container host:

const speechConfig = sdk.SpeechConfig.fromHost("ws://localhost:5000");

Instead of using this Azure-cloud initialization config:

SPXSpeechConfiguration *speechConfig = [[SPXSpeechConfiguration alloc] initWithSubscription:...];

Use this config with the container host:

SPXSpeechConfiguration *speechConfig = [[SPXSpeechConfiguration alloc] initWithHost:"ws://localhost:5000"];

Instead of using this Azure-cloud initialization config:

let speechConfig = SPXSpeechConfiguration(subscription: "", region: "");

Use this config with the container host:

let speechConfig = SPXSpeechConfiguration(host: "ws://localhost:5000");

Instead of using this Azure-cloud initialization config:

speech_config = speechsdk.SpeechConfig(
    subscription=speech_key, region=service_region)

Use this config with the container endpoint:

speech_config = speechsdk.SpeechConfig(
    host="ws://localhost:5000")

When you use the Speech CLI in a container, include the --host ws://localhost:5000/ option. You must also specify --key none to ensure that the CLI doesn't try to use a Speech key for authentication. For information about how to configure the Speech CLI, see Get started with the Azure AI Speech CLI.

Try the speech to text quickstart using host authentication instead of key and region.

Next steps

• See the Speech containers overview
• Review configure containers for configuration settings
• Use more Azure AI containers