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Release 2.0.7


ZoomISO v2 build 2.0.7 contains a handful of stability and workflow improvements and can run in parallel to the upcoming v2.1 beta release.

  • The “All” setting for both Embedded Audio as well as Advanced Audio channels is now a mix-minus, removing the local client’s mic input from the output

    • Previously, audio sent via these outputs would contain audio being sent into the meeting via the mic input in the ZoomISO client window

    • Now, the “All” output behaves like the Speaker output of a Zoom client, which removes “self audio” from the mix

  • Added a “Force Gallery View” setting in the OSC Settings area

    • When sending a spotlight command to ZoomISO, if this setting is enabled, the client view will automatically return to Gallery View to preserve the ability to track changes in the view via OSC

    • This change will be released for ZoomOSC in the future as well

  • Resolved an issue where the Output Engine would revert itself to Standby if ZoomISO was promoted from co-host to host

    • Output streams may still reinitialize during promotion, but there will be no intervention required by the user

  • Added a change to the ZoomISO save file format in preparation for ZoomISO v2.1 Beta

    • This will allow users to move between v2.0.7 and v2.1 Beta without requiring a Clear Cache operation every time

  • Fixed a crash when calling /listWindows when not in a meeting

    • This change will be released for ZoomOSC in the future as well

  • Fixed a crash caused by requesting the status of an Advanced Audio channel’s gain setting via OSC at the same moment as changing it via the UI

  • Fixed a crash caused by moving the Output Engine to Standby mode with an Active Screenshare output configured and active

  • Updated Zoom Meeting SDK to version 5.14.6


Release 2.0.6

ZoomISO v2 build 2.0.6 resolves issues with screen sharing, adds a new login flow, and introduces a new SDK version with several additional improvements

  • Reliability issues with screenshare output modes have been resolved


  • If you want to output a particular individual’s shared content, use Screen Share output mode

  • If you just want to get the current shared content, without binding it to a participant, use Active Screenshare.

    • There are two selection options, Share 1 and Share 2 with this mode. If two people are sharing simultaneously, and the first person stops sharing, Share 2’s content moves to Share 1, and Share 2 is cleared.

    • If multiple shares are not enabled, and one share “cuts off” the next, it will always end up on Share 1

  • We do not advise utilizing more than two shared content outputs of any type combination at once, since Zoom Clients can receive a maximum of two shares simultaneously

  • ZoomISO now uses the default browser for login

    • This allows an easier flow for remaining logged in between app launches, remembering login, and using password managers to complete the Zoom login

    • The previous embedded login window flow has been moved to the top menu for workflows that require it

  • New setting “Use Transparent Pillarboxing”

    • When mapping non 16:9 content to an output, this setting determines if the pillarboxed exterior area is black or transparent (alpha).

  • Added new OSC commands and outputs for configuring ZoomISO

    • See updated user manual for details and syntax

  • Changed ZoomISO NDI output timing data so it is compatible with the vMix Multi-Recorder when using h264 encoding

  • Embedded ZoomOSC version upgraded to ZoomOSC 4.2.0

  • On macOS, a button was added for enabling breakout room OSC commands.

    • Checking this box will disable the breakout interface in the Zoom UI.

    • We will remove this trade-off in a future release

  • Upgraded Zoom Meeting SDK to version 5.14.0

Release 2.0.5

ZoomISO v2 build 2.0.5 introduces High Bandwidth Mode, alongside a new SDK version with a handful of improvements.

  • High Bandwidth Mode (HBM) is now available for ZoomISO Pro users

    • HBM allows a 100mbps link between the Zoom Cloud and ZoomISO Pro. An average 1080p Zoom participant video feed is between 4-6mbps. As a result, customers should be able to export up to 16 participants at 1080p on capable hardware.

    • To use HBM in a Breakout Room, Zoom Support must enable the Breakout 100 Account Setting for for the host’s account.

  • ZoomISO 2.0.5 is based on Zoom Client version 5.12.2

  • Fixed issue where participant meeting interactions caused a disruption in frame delivery to outputs

  • Added new OSC commands

    • See documentation for details

  • Fixed issue where mobile video was incorrectly scaled and cropped

  • Added Gallery Position as a Mode for identifying a participant in the Outputs Tab

  • Status column in Outputs Tab has been changed for increased insight

    • The incoming resolution and frame rate are now accompanied by a cycle time, represented in milliseconds. The cycle time represents the number of “new” frames of participant data that are added to the output. Remember that the target frame rate is achieved by dropping or repeating frames as needed from the dynamic Zoom input to achieve the desired output. Incoming FPS and cycle time will help you identify the quality of participant video and the performance of ZoomISO.

  • Resolves various bugs related to core media engine stability.

Release 2.0.4

ZoomISO v2 build 2.0.4 resolves a handful of integration issues and improves export capabilities for screen share and mobile video.

  • Adds new Active ScreenShare Output Mode that allows for the routing of shared content to outputs without identifying the participant who will initiate the share

  • Contributors joining via mobile devices (potentially with non-16:9 video aspect ratios) will now properly scale and rotate within ZoomISO’s outputs

    • ​All ZoomISO outputs will remain 16:9, so if the participant sends a different aspect ratio, their video will be composited onto a 16:9 alpha layer (which will appear as black on export protocols that do not support embedded alpha channels)

  • Fixed issue where ZoomISO Lite did not send a complete participant snapshot packet via OSC

    • This will solve issues for customers using ZoomISO Lite who had missing participants on their BitFocus Companion StreamDeck pages in the new module​

  • Fixed issue where various UI elements would reset themselves under certain circumstances

  • Unchecking the Enabled tick box in the Outputs View now unsubscribes ZoomISO from the incoming participant video and audio feed​

    • ​Previously, only the output would be impacted by this tick box. After discussions with customers, we decided to unsubscribe from both the input and the output using this tick box. This means that disabled outputs will not contribute to your incoming bandwidth, but it may take a brief moment for the output to be reconstructed when the output is re-enabled.

  • When a participant stops sharing, the render object for the shared content is now fully disposed, improving the turnover between shares from multiple participants in sequence.

  • Resolves various bugs related to core media engine stability.

Release 2.0.3

ZoomISO v2 build 2.0.3 marks the end of Open Beta. This update contains a number of fixes to all major app components. 

  • Fixes issue where ZoomISO Lite did not always embed audio in NDI outputs

  • ZoomISO Client can now initiate ScreenShares

  • ZoomISO can now automatically detect when a ScreenShares starts and will begin transmitting video when the selected participant begins their share

    • Previously, ZoomISO would stay in Video Loss Mode unless the ScreenShare output was created after the selected participant began sharing

  • Active Speaker output type no longer switches to Video Loss Mode during the transition between speakers

    • We still recommend using “All” as the audio type if you are embedding this into an NDI output set to Active Speaker to avoid audible disruption during the speaker rollover 

  • OSC Subscribe To level no longer impacts participant availability in the ZoomISO UI

  • Added additional checks to keep UI selections in-sync with the media engine

  • The OSC Pong reply now indicates the license activation level in the app identification string

  • Added additional crash protection surrounding Advanced Audio

  • Changed App Entitlements structure

    • Package is now named “ZoomISO -”

Release 2.0.2 Beta

ZoomISO v2 build 2.0.2 resolves several bugs identified during open beta testing and improves stability surrounding video loss and screen sharing

  • The macOS top menu bar no longer appears on top of ZoomISO’s Fullscreen Display Outputs

  • Channel mapping using the Outputs Mode in Advanced Audio will now include the proper output mapping in the auto save

  • Video Loss Mode will now apply automatically when a user finishes sharing their screen

  • Resolved issues with Image Video Loss Mode not properly supporting PNG and JPEG file formats

    • Images should now scale automatically to fill the 16:9 frame

  • Fixed system lockup when assigning a screen share output when the user was not actively sharing

    • ZoomISO still may not immediately bind to the shared video of participants when the output is created before the user starts sharing. This known issue remains on our list of items to resolve.

  • Freeze Video Loss Mode now automatically “un-freezes” when participant video is restored

  • Fixed bundled ZoomOSC Essentials/Pro command activation not respecting ZoomISO Pro/Lite/Trial activation level

  • Fixed crash when running the Clear Cache operation in the File Menu

  • Fixed crash when targeting a user via Target ID when they are not in the meeting

  • Resolved issue where login token was expiring too soon

    • This resolves the issue where users would log in, and then fail to join a meeting that requires registration several minutes later

  • The OSC /zoom/joinMeeting command now respects the log-in status of ZoomISO

    • For those having trouble joining meetings via this command due to registration issues, so long as the ZoomISO client is logged in, this OSC command will now interact with the login status to execute the proper join flow

Release 2.0.1 Beta

ZoomISO v2 build 2.0.1 adds several stability updates and performance optimizations

  • Improved the novel frame rate output for BlackMagic Desktop Video devices

    • SDI outputs from devices like the BlackMagic Decklink should now appear smoother as this fix resolves micro-stuttering noticed by some users under certain configurations

  • Upgrade to NDI SDK 5.5

    • Previous versions of the NDI library were found to have compatibility issues with the latest NDI tools

    • Vizrt Group has also recently updated NDI tools to fix bugs found in their platform, and we recommend that customers using NDI 5.5 upgrade to the latest version of NDI Tools

  • Fixed app hangup when using Freeze Video Loss Mode when output data is not available

  • Updated debugging messages in Verbose Log Mode

    • Only use Verbose Log Mode if working with a Liminal Support team member, as this mode will degrade app performance 

  • Output engine help text and toggle states better reflect the conditions under which participant data can actually be captured

    • For example, the output engine will remain Paused when Cloud Recording is enabled, as you cannot enable local recording when this feature is active. 

  • Stability / bug fixes surrounding media engine, significantly improving app stability in more diverse situations

Release 2.0.0 Beta

ZoomISO v2 is a new product version encompassing a complete rewrite of the core features of the app and the addition of new workflows and technologies that dramatically expand the capabilities of the Zoom platform in the world of event and broadcast production. ZoomISO v2 introduces Lite and Pro versions of the software, licensed via new subscriptions.

ZoomISO Lite


  • Contains all features of ZoomOSC v4.1 Essentials and Meeting Client 5.11.3

    • Introducing “Sign in with Zoom,” a replacement for the previous “Email Login” workflow that was limited to direct email accounts only.

    • Native Apple Silicon Support with video acceleration

    • See full changelog from ZoomOSC v4.1 for more details

  • New Video Engine

    • ZoomISO now uses “Raw Data” access, improving performance and image quality

    • Export up to 4 video outputs to NDI, Syphon, and Displays

    • New Output Modes allow the creation of video feeds based on a specific participant, active speaker, spotlight index, or screenshare.

    • Added ability to specify output frame rate 

    • New video loss modes

    • Video outputs can be previewed via a pop-over window

    • Video outputs can now have fully custom names

  • ​Embedded ISO Audio

    • NDI outputs can be configured to have embedded audio, which can be isolated to the participant or a mix of the whole meeting

  • New User Interface

    • Participant lists are alphabetized and searchable

    • Participants View can now be filtered 

    • Output status is made available per-output to see FPS and resolution

  • App configuration can be saved, loaded, and merged

  • To export participant data, ZoomISO must have local recording permission, or a role of (co)host. 

    • By default, the Output Engine will be set to Paused, which sets all outputs to video loss mode

    • When ZoomISO has sufficient permission, the Output Engine can be Enabled, at which point, the meeting will surface a Recording notification to all participants, and the outputs will begin to export participant AV data

  • Trial Mode no longer watermarks outputs. Instead, ZoomISO will cut to a “No License” card for two seconds every sixty seconds. During this time, audio outputs will be muted.

  • ZoomISO v2 is supported on Apple Silicon Macs using macOS Monterey. Intel-based Macs or Macs running older versions of macOS are not officially supported, and while the app may run on these systems, the experience may not be optimal.

ZoomISO Pro


  • All features of ZoomISO Lite and ZoomOSC v4.1 Pro

  • High Bandwidth Mode, which allows for more than four participant outputs to be created, depending on the availability of hardware and network resources. 

    • High Bandwidth Mode, particularly when enabling more than 6 1080p 30FPS outputs, requires updates to Zoom’s global infrastructure that are currently in progress, and may require until mid October to complete worldwide rollout. Any ZoomISO client updates required to fully enable this feature, if not already available, will be provided free of charge to ZoomISO Pro users. 

    • At this time, ZoomISO is the only product on the Zoom Platform that can leverage “High Bandwidth Mode,” so the infrastructure updates referenced above will not yet impact the decoders present in Zoom Rooms or Zoom integrations developed by third party companies.

  • Native support for BlackMagic Desktop Video Devices such as the DeckLink Duo 2 and Quad 2.

    • ZoomISO Pro will discover these devices and allow them to be selected as outputs directly from within the app

    • It is important to install and configure the BlackMagic Desktop Video driver and preferences pane (particularly for I/O cards that default to using paired I/O modules on a per-host basis) before attempting to assign participants to outputs in ZoomISO Pro. 

  • Advanced Audio

    • ​ZoomISO Pro adds a tab for assigning audio to any multichannel audio device on the Mac, including Loopback and Dante Virtual Soundcard

    • Participants can be routed to channels of these devices by name, or by following whoever is assigned to a video output. The meeting’s mixed audio can also be assigned

    • Audio can be attenuated by up to -12 db within ZoomISO

    • New ../audioISO user action is added for managing this routing from external devices like a StreamDeck with the new BitFocus Companion Module.

    • Audio Meters display activity on a per-channel basis

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