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Genvid Technologies

Genvid SDK 1.29.0

Welcome to Genvid Technologies SDK 1.29.0. This release is ready and stable
for integration and can be used for local development and limited cloud
deployment. We are still missing some features for a complete production
deployment which can be provided through other software. Please contact us at if you’re planning a production deployment.

We are still committed to a regular pace for our releases until we get all the
features done for a comfortable production deployment. We always work to
ensure a smooth upgrade between releases and provide as much backward
compatibility support as possible. A complete list of our Known Issues and
Workarounds is available to you in our Forum. Please contact us if you
have any issues.

Major Fixes and Changes

SSL Support in Toolbox

We added SSL support to the Toolbox with the new genvid-sdk generate-ssl
command. It lets you create a certificate that uses Vault as the Certificate
Authority. The bastion setup script (genvid-bastion install) configures
Vault so that you can create a certificate using the new command.

If the Vault setup was excluded from the default setup of your bastion for
some reason, you can add the required configuration to Vault using the
genvid-bastion setup-vault-engines command.

See the documentation for more information.

Unity 2020.3 LTS Official Support

The Genvid SDK now officially supports Unity LTS version 2020.3.

Minor Changes and Other Fixes

  • [documentation] Added missing parenthesis in C-Sharp
    wrapper comments.
  • [documentation] Corrected an old reference to the local-services
    folder in the “Nomad Configuration” section.
  • [documentation] Added required global-tools list to “Before You
    Begin” in the “Game Integration” section.
  • [sdk] Fixed an issue where crashes and exceptions were not
    displaying in the logs.
  • [sdk] Fixed an issue where socket fails to close after a bad_alloc
    exception is thrown in a user callback.
  • [toolbox] Added command general-ssl to genvid-sdk to have TLS
    certificate generation.
  • [toolbox] Added setup of PKI roles to genvid-bastion install
    command to load PKI roles information from JSON files during
    bastion setup.
  • [toolbox] Added command setup-vault-engines to genvid-bastion
    to enable Vault secret engines and apply roles without
    reinstalling bastion.
  • [toolbox] Improved the availability of the load_config_template
    method by making it available from the base class
  • [toolbox] Improved the availability of the merge_dict method by
    making it available from the base class BaseTool.
  • [toolbox] Improved BastionTool by no longer inheriting
    deprecated class ClusterTool.
  • [toolbox] Deprecated the method
    ClusterAPI.load_project_definition. The API surrounding this
    method is not used anymore.
  • [toolbox] Fixed a problem during a local bastion startup by
    detecting if another service is already running.
  • [toolbox] Improved the error message when a vault is trying to be
    initialized with an empty vault key during a local bastion
  • [toolbox] Fixed an issue where the errors “ContainerNotFound” and
    “Storage not found” occured when calling the genvid-azure-image create-images command.
  • [gvencode] Fixed an issue where the audio and video would de-sync
    when the user enables composition.
  • [gvencode] Fixed an issue where gvencode discards audio frames
    when the received audio/video stream is shifted.
  • [gvencode] Fixed an issue where gvencode loses the audio feed if
    the received audio/video stream is not synchronizable.
  • [gvencode] Improved the audio streams coherency by ensuring a
    stable framerate between sources.
  • [gvencode] Fixed an issue where the game stream would accumulate
    audio/video de-sync when the game restarts.
  • [gvencode] Fixed an issue where the audio reframer filter does not
    have the same FPS as the Video.
  • [gvencode] Added metrics and information in RemoteGUI to show the
    input and output frequency of the Source Filter.
  • [bastion-api] Fixed an issue where Terraform module paths
    containing the @ character were not working.
  • [studio] Fixed an issue where the warning messages would not
    automatically disappear when the user triggered them.
  • [studio] Fixed an issue where the Studio web page would freeze
    after extended use.
  • [studio] Updated documentation to remove deprecated information
    for scenes in the Genvid Studio service.
  • [ingest] Fixed an issue where audio is not sent at the same rate
    as the video.
  • [ue4-plugin] Fixed an issue where the UE4 plugin would not
    propagate the provided data stream framerate to the Genvid DLL.
  • [nats] Fixed an issue causing the job nats-window to not start
    in a cloud cluster on a Windows instance due to its package not
    containing the expected filename.
  • [aws,azure] Upgraded Python on game machines from 3.5.4 to 3.8.6.
  • [aws,azure] Upgraded PIP on game machines from 9.0.3 to 21.1.2.
  • [bastion] Added bastion initialization configuration to bastion- services/init. This lets you add new configuration variables
    before the start of the bastion job.

Known Issues

Compose window isn’t available if behind a proxy.

Future versions of Bastion will have a remote server to allow access from
different machines. The current version has limited support for this and is
likely to encounter some problems if the Bastion host lives behind a cluster
firewall (like on an Amazon EC2 machine).

As a workaround, you can create VPN connections to the Bastion machine so the
local IP of the machine is accessible from the client machine.

Standalone player with Firefox not working.

The readable streams must be enabled in Firefox for the standalone player to
work properly. You must set dom.streams.enabled and
javascript.options.streams preferences to true from the about:config

Auto-cut checkbox state is stored locally only.

In Studio, the state of the auto-cut checkbox in Scene Widget is only stored
in local storage. (Clearing the browser cache will also clear user input.)
Also, if auto-cut is turned “on” before the Studio session ends, it will be
set back to “off” by default when you start the Studio session again.

Audio captures microphone or infinitely loops.

When using the WASAPI audio auto-capture mode, every sound going through the
machine’s default audio-device gets captured. This includes system alerts and
microphone input, as well as your web browser. When test-viewing your game
stream using the same local machine running the game, the game will also
capture its own audio stream with ~10s of latency. This yields some echo with
progressively worse sound quality since it is compressed every time it is

You can disable audio in 2 ways:

  • Set settings.encode.input.silent to true in your
    configuration. (The default setting.)
  • Use our raw audio-capture, which is now the default setting in

Only one application with the Genvid SDK integrated may run at a time if

not launched using Nomad.

If an application using the Genvid SDK is launched without Nomad, a default
session name is assigned to it. This is useful when testing your application
in the Unity engine, Unreal engine, or booting your application manually.

Currently, the Genvid SDK is unable to support multiple applications launched
this way unless you change the environment variable GENVID_SESSION_NAME to a
unique name. You can also launch your applications via Nomad to avoid this

We will fix this in a future release.

Twitch and YouTube Synchronization Advisory

During testing, we’ve found some synchronization issues when broadcasting via
both Twitch and YouTube. See the Twitch
and YouTube sections for details and workarounds
for each.

Azure reports requested instance size not available.

On Azure, we are using a compute instance type Standard_NV6 for the game
machine. For some accounts, only the promo version of this instance type is
available (Standard_NV6_Promo).

When doing the Terraform setup on the Azure module, you may encounter the

System Message: WARNING/2 (releases/release-1.29.0.rst, line 258)

Cannot analyze code. No Pygments lexer found for “none”.

.. code-block:: none

   The requested size for resource 'XXXX-game-1' is currently not available in location 'XXXX'

As a workaround, go to your Terraform Settings page and change the
instance_game_type to Standard_NV6_Promo, then go to the Commands page and try
Plan apply → Apply again.

iPhone issues with Twitch.

Since the Twitch API doesn’t return any values for the attributes of the
getPlaybackStats() call on iOS devices, you will encounter imprecise or
inconsistent synchronization performance.

Streaming to an iOS device with the Standalone player is currently not


Streaming to an iOS device (iPhones and iPads) with the Standalone player is
currently not functional. This issue will be fixed in a future release.

Internet connection slowdown can cause the game data to desynchronize when

Ingest is running.

When running Studio with Ingest, the game data may desynchronize from the
video stream when the Internet connection experiences a slowdown. Once the
slowdown clears up, the game data will resynchronize with the video stream.

Links for a local cluster are disabled in RemoteGUI interface.

When using RemoteGUI for a local cluster, opening a tab by clicking a link
from the Composition, Encoding, or SDK GUI buttons disables the link
(indicated by it turning from blue to red). The link will be re-enabled when
you close the corresponding tab.

When changing Availability Zones in Azure, resources need to be destroyed

and rebuilt.

When changing AZs in Azure, deleting the public IP might fail due to it not
being detached from the virtual machine. This is a bug in the Terraform
provider. See the issue on the Hashicorp Github for more information.

As a workaround, manually detach the offending public IPs from the virtual
machines in the Azure portal.

Toolbox is not fully compatible with Python 3.9.x.

The Genvid Toolbox is not fully compatible with Python 3.9.x at this time. To
avoid problems using our toolbox, we recommend you downgrade Python to version

genvid-sdk upload-images-sdk command fails to upload the Docker image on

Azure Cloud.

Some Docker images can’t be uploaded to Azure Cloud using the genvid-sdk upload-images-sdk command due to large sizes. (You will get an SSL error and
a Max retries exceeded message.)

As a workaround:

  1. Open the Azure UI.
  2. Upload your image manually.
  3. Run genvid-sdk upload-images-sdk again.

Performance issue when using the Chroma Key Filter.

When using the Chroma Key Filter, we recommend using a c5.4xlarge or better
for the encoding machine. Less powerful instances may force the system to
accumulate some frames in memory, leading to out-of-memory conditions.

The amount of frames accumulating depends on many factors–the encoding
parameters, the source FPS, the amount of variation between the source images
content, the richness of their content, etc. For more information on
monitoring the memory usage of GVEncode, see the Hashicorp

Required to manually remove the subdomain NS record when updating the

subdomain on an existing AWS cluster.

When creating an AWS cluster using basic_cluster_alb_ssl or
minimal_cluster_alb_ssl, the domain and subdomain are provided. When
updating an existing cluster’s subdomain, the route53 NS record for the
previous subdomain needs to be removed manually from the main domain. This is
due to how the NS record is handled within our Terraform.

Unable to delete subnets in cluster basic_cluster_alb_ssl using AWS.

When changing subnet_cidr_block_size in basic_cluster_alb_ssl, decreasing
the number of AZs, or reordering existing AZs, the cluster will get stuck
trying to delete the subnets.

Reapplying the configuration won’t resolve the issue.

Workaround: delete and recreate the cluster.

Bastion cluster Settings page modal window not closing.

In the Bastion Settings page for a cluster, the Properties modal
window for custom tags doesn’t close when you click outside of it.

As a workaround, click on Properties again to close the modal window.

Terraform upgrade leads to 'Error: Failed to query available provider


When upgrading an existing cluster to Terraform 0.14, it’s possible to receive
Error: Failed to query available provider packages. You can be resolved by
deleting the Terraform lock file from
%USERPROFILE%.genvidterraformworkdir{cluster name}tf and then reinitializing
the cluster.


Loading configurations in the incorrect order can overwrite values.

Whether you’re using SSL on a cloud or a local cluster, if you load
youtube.sample.hcl before loading the web sample, the web sample will
overwrite the value associated with the embed_ssl from the web.hcl file.

Large NTP time offsets will prevent the stream from playing.

If you encounter large NTP time offsets, your stream may stop playing. As a
workaround, make sure that the game machine is configured to update its clock
automatically. For local configurations, replace the AWS IP address with

See the AWS configuration section for more information.

Studio can’t take inputs of the same control from multiple windows.

If Studio is opened in more than one browser window and inputs are received
from different sources to one control, the final value will then bounce
between the different inputs instead of updating it to the latest one. For
example, in Audio Mixer Widget, if a user changes the slider of Master Gain to
20 db and another user then changes it to 0 db, the slider handle will bounce
between 20 db and 0 db instead of being set to 0 db.

Sending input from multiple Studio windows to one control is not recommended
until we resolve the issue.

The application doesn’t work properly after Windows comes back from sleep.

Nomad has some difficulties with sleeping jobs, including itself. This is
unlikely to get fixed in Nomad, but shouldn’t happen in a production
environment. The best workaround at present is to not allow Windows to go to
sleep when you are running the service, or simply to restart the service with
a genvid-bastion reinstall. (Unfortunately, genvid-bastion restart is not

The SDK clamps framerates under 1.0.

To prevent issues, we raised the lower limit for the framerate to 1.0 for any
stream. The SDK will clamp the value to 1.0 FPS if it’s less than 1.0.

Default value for an Azure resource group name may be too long.

If no values are provided for the variable resource_group_name, the value is
set to a combination of {bastionid}-{clustername}. This can yield names
longer than 64 characters, which is the maximum number of characters allowed
for an Azure resource group name.

To avoid this problem, always provide a value of 64 characters or less for the
variable resource_group_name.

See the Azure Github for more information on Azure naming conventions.

AWS clusters subnet collision error.

If you reduce the subnet_cidr_block_size and increase the number of AZs for
an AWS cluster at the same time, it causes a subnet collision error.

If you encounter this issue, reapply the configuration to resolve it.

No new tags on Azure disk when updating a cluster.

When applying new tags to Azure clusters, tags will not be applied to disk
unless the virtual machine instance that owns the disk gets recreated during
the apply process.

As a workaround, delete and recreate the cluster to resolve the issue.

Cluster names are limited to 64 characters.

Cluster names are limited to 64 characters due to limitations with the file
system in Windows. Things like the system’s username and cluster name factor
into the max number of characters of the file directory.

While it is technically possible to go above 64 characters, the results can be