You can configure VMware Blast options for remote desktop and published application sessions that use the VMware Blast display protocol.
You can allow H.264 decoding and High Efficiency Video Coding (HEVC). H.264 is an industry standard for video compression, which is the process of converting digital video into a format that takes up less capacity when it is stored or transmitted. When H.264 decoding is allowed, you can also allow increased color fidelity.
The maximum resolution that is supported, and whether HEVC is supported, depends on the capability of the graphical processing unit (GPU) on the client. A GPU that can support 4K resolution for JPEG/PNG might not support 4K resolution for H.264. If a resolution for H.264 is not supported, Horizon Client uses JPEG/PNG instead.
If your environment uses a proxy server, you can specify whether to allow VMware Blast connections to an operating system proxy server.
For an SSL proxy server, you also need to configure certificate checking for secondary connections through the SSL proxy server. For more information, see Setting the Certificate Checking Mode in Horizon Client.
You can configure VMware Blast options before or after you connect to a server.
For administrators - You can configure the VMware Blast HEVC and proxy server options so that end users cannot change them by setting keys in the /Library/Preferences/com.vmware.horizon.plist file on the Mac client. To configure the HEVC option, set the Allow HEVC key to one of the following values.
- 1 activates High Efficiency Video Decoding (HEVC)
- 0 deactivates High Efficiency Video Decoding (HEVC)
To configure the proxy server option, set the Blast via Proxy Mode key to one of the following values.
- 1 activates Allow Blast connections to use operating system proxy settings
- 0 deactivates Allow Blast connections to use operating system proxy settings
- Horizon Agent 7.13 or later must be installed.
- For increased color accuracy with YUV 4:4:4, Horizon Agent 7.13 or later must be installed.
- Client system must have a GPU that supports HEVC decoding.
- For full-range color and improved color fidelity, Horizon Agent 2203 or later and Horizon Client for Windows 2203 or later must be installed. These features apply only if YUV 4:4:4 is being used.
The client-side Allow Blast connections to use operating system proxy settings group policy setting determines whether VMware Blast connections can connect through a proxy server and whether users can change the VMware Blast proxy server setting in the Horizon Client user interface. For more information, see Using Group Policy Settings to Configure Horizon Client.
Depending on the Horizon Agent version that is installed, a Horizon administrator can use agent-side group policy settings to activate or deactivate VMware Blast features, including H.264 and HEVC high color accuracy. For information, see "VMware Blast Policy Settings" in the Horizon Remote Desktop Features and GPOs document.
- Start Horizon Client.
- Click Settings (gear icon) in the upper-right corner of the menu bar and select VMware Blast.
- Beginning with Horizon Client for Windows version 2206, both Allow H.264 Decoding and Allow BlastCodec Decoding options are on by default. If you leave both options selected, BlastCodec is used for receiving remote screen content. If you de-select Allow BlastCodec Decoding, H.264 is used.
- To allow increased color fidelity when H.264 decoding is allowed in Horizon Client, select the Allow High Color Accuracy (reduces battery life and performance) check box.
When this option is selected, Horizon Client uses high color accuracy, but only if the agent supports high color accuracy. Selecting this option might reduce battery life and performance. This feature is deactivated by default.
- To allow HEVC, toggle the Allow High Efficiency Video Decoding (HEVC) option to on.
When this option is selected, performance and image quality are improved if the client machine has a GPU that supports HEVC decoding. This feature is activated by default.If this option is selected but the client machine does not have a GPU that supports HEVC decoding, or the agent does not support HEVC encoding, Horizon Client uses H.264 decoding instead if H.264 is selected. Horizon Client uses Blast Codec decoding if H.264 is not selected.
- To activate high dynamic range decoding, select the Allow High Dynamic Range Decoding (HDR) check box.
This option is available only if you activate the Allow High Efficiency Video Decoding (HEVC) setting.
- To allow VMware Blast connections through a proxy server, toggle the Allow Blast connections to use operating system proxy settings option to on.
Changes take effect the next time a user connects to a remote desktop or published application and selects the VMware Blast display protocol. Your changes do not affect existing VMware Blast sessions.