> For the complete documentation index, see [llms.txt](https://docs.medialooks.com/video-transport/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.medialooks.com/video-transport/useful-links/change-log.md).

# Release notes

### **1.9.5.1245**

**Web Guest & UI Improvements**

* Fixed an issue where channel reconnection started automatically when opening Web Guest.
* Fixed an issue where video encoder properties were not applied in Web Preview and Web Guest.
* Fixed an issue where unsupported values in the Frame Rate field were not reflected correctly in Web Guest settings.
* Fixed incorrect transparency value of the webcam preview toggle button icon in Web Guest UI.
* Fixed an issue where selected audio channels were not applied after changing other Web Guest settings.
* Fixed an issue where changing 'Other Channels' or 'Audio Channels' did not switch channels in Web Guest settings.
* Fixed duplicated device and encoder lists in Web Guest settings UI.
* Fixed an issue where the volume fader was displayed when using `autojoin=1` in Web Preview.
* Fixed missing audio and video device names in Firefox browser.
* Fixed an issue where audio disappeared when switching layout modes and resizing the browser tab.

**Performance & Stability**

* Fixed a critical memory leak in MServer.exe (VT Publisher) 
* Fixed random console closure of VT\_Server.exe.
* Fixed frame drops on the receiver after 24–48 hours of continuous operation (AV1 / HEVC / H.264).
* Fixed degradation of incoming FPS on VT Publisher sources using BMD DeckLink Duo 2 / Quad 2 after long uptime.
* Fixed an issue where VT Receiver disconnected from signaling after prolonged operation (5+ hours).

**Video & Encoding**

* Fixed an issue where preview VT\_Publisher.exe full screen mode was disconnected
* Fixed loss of 10-bit / HDR signal during streaming from VT Publisher to VT Receiver.
* Fixed an issue where Video Transport using WebRTC as the primary protocol was limited to 30 FPS on the receiver.
* Fixed preview 'green' artifacts VT Control Panel.

**Audio Issues**

* Fixed an issue where entering non-numeric characters in the Other Channels field caused audio volume to increase.

**CC & Metadata**

* Fixed an issue where VANC Closed Captions and Timecode were lost on the receiver side.

**Licensing, Cabinet & Infrastructure**

* Modified display of On-Premises licenses in the user cabinet after license updates.
* Added a Download Dev Build button to the VT user cabinet.

## 1.9.5.1080

**Web Guest & UI Improvements**

* Fixed issue where the Name and Location fields did not change in the source name in the publisher.
* Added AutomationID for static controls in VT Publisher and VT Receiver.
* Fixed missing scrollbar in Web Guest Settings when selecting a camera source.
* Fixed missing "Add User" option in Perpetual WebUI. On premises installation.
* Modified retrieval of exp\_date and channels in WebUI. 
* Fixed missing tooltips when hovering over Download buttons in Control Panel.
* Fixed typo in pop-up when restoring a password.

**Performance & Stability**

* Fixed crashes occurring under stress tests.
* Fixed crashes in signaling when frequently updating props  VT API changes.
* Fixed crash in publisher when trying to connect to an audio-only NDI stream.
* Fixed crashes when frequently setting props in VT API

**Video & Encoding**

* Added NVIDIA AV1 encoder / decoder.
* Fixed Medialooks overlay issue on the receiver side.
* Fixed color loss on preview.
* Fixed color distortion when using VP9, CPU-H264.
* Fixed missing JPEG previews in Control Panel.
* Fixed issue where alpha channel video was not transmitted when `gpu_pipeline=false`.
* **Fixed issue where Nvidia GPU encoder did not work with the latest starting from NVIDIA drivers 560.81**
* Fixed issue where the video signal was not transmitted in AJA Corvid 44 for 4K or had distorted video.
* Fixed issue where no image was shown on VT.Control Panel preview if the video format was Progressive.

**Audio Issues**

* Fixed issue where no sound was heard from Web Guest on iOS when Audio Enhancements=false.

**Streaming & Connection**

* Fixed issue where Web Guest stream would stop unexpectedly.
* Fixed issue where the exp\_date value did not change in VT after adding an additional license with a different date. On-premises versions.

## 1.9.4.995

* SFU support for on-premises installation
* Improved stability and performance
* Common bug fixes

## 1.9.4.976

* Fixed Gateway reconnect problem
* Fixed Decklink 8K Pro compatibility issue (BMD Desktop drivers 12.1 )
* Other minor fixes

## 1.9.4.967

* Web Guest/Preview. Added volume fader
* Web Guest Security settings. Now you can set the connection limit to the Web Guest link account
* ASIO & Dante fixes
* VTGateway routes (gateway to gateway connection ability)

## 1.9.3.930

* Added new feature Port range configuration
* Added new feature TCP/UDP passthrough 
* Fixed an issue with FPS degradation (some BMD models)
* Fixed "UCEERR\_RENDER" crash.

## 1.9.2.881

* Dante digital audio support (via ASIO)
* New sub-licensing system in the My Account section of the Control Panel
* Audio-only streams support.
* Multiple fixes and improvements (including those related to long-term audio sync).

## 1.9.1.808

* Receiver location detection if it started before another VT app fix
* Removed irrelevant Line-in input for non-SDI sources
* Publisher Web Preview & Guest output feed max width/height setting fix
* WebRTC 2.0 as an experimental feature (beta mode)
* Added ability to set not a broadcast convert output format for NDI
* Added Web Guest camera frame rate setting
* Added ability to set up different stream codecs between Web Guest and Publisher (VP9 or H\_264)
* Removed Publisher window size limitation
* Alpha channel contained picture multiplication error for streams output to BMD cards fix
* Web Guest bitrate setting fix
* Irrelevant huge network bandwidth consumed when 2 or more sources are published, one output in the VT Receiver and one opened on preview fix
* Other minor fixes

## 1.9.1.791

* New 64-bit executables
* New VT Guest bitrate selection combo box
* Updated AJA cards support for the latest drivers

## 1.9.0.755

* VT 2.0 is now the default connection protocol
* Custom user-defined labels for video sources
* Overall stability improvements

## 1.8.2.740

* Optimization for Decoding/Demultiplexing

## 1.8.1.737

* Fix for aggressive CPU load under some conditions
* SRT: Set default SRT latency to 750 ms

## 1.8.2.735

* Fixed latency for video-only streams
* Added statistics for lost audio/video/network packets

## 1.8.1.734

* Brand new VT 2.0 connection engine
* Global Settings
* 10-bit support and new GPU processing
* Updated Web Guest

## 1.8.1.731

* Added rotation support for Web Guest video
* Improved Demultiplexing/Buffering

## 1.8.1.727

* Fix for NVidia “high performance” preset

## 1.7.3.636

* Remote settings control for Web Guests
* Password-protected Preview and Web Guest links
* Updated NDI library to version 4.5.3

## 1.7.2.598

* Added automated mix-minus feature for Web Guests
* Added Bluefish cards support

## 1.7.1.584

* Added “My account” tab at Web Control Panel
* Updated Web Guest user interface

## 1.7.1.576

* Added brand new bi-directional Web Guest feature
* Added embedding of external audio sources into SDI feeds
* Automatic video format conversion of received feeds to broadcast formats for proper SDI or NDI output

## 1.7.0.568

* New VT Guest application (Windows-based) for remote contribution
* NDI updated to version 4.5

## 1.6.2.530

* New internal VT protocol (brand new ABR algorithm that sits on top of SRT)
* Added encoder selection (H.264 or H.265)

## 1.5.0.480

* Added Forwarding Error Correction (FEC) support to increase the reliability
* Added Auto port forwarding for initiating SRT mode
* Added contribution via Web browser feature
* Introduction of “partner licenses” for remote contribution or delivery to third parties