Changelog

All notable changes to the webrtc package will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

[3.0.0] - 2025-09-12

Changed

  • Update minimum Unity version.
  • Upgrade libwebrtc to support 16kb pagesizes for Android.
  • Change Info.plist format for iOS native plugin.
  • Change license to Unity Companion License.

Fixed

  • VideoStreamTrack fails to start streaming on Android.

[3.0.0-pre.8] - 2024-12-12

Changed

  • doc: improve the API doc of CameraExtension
  • doc: improve the API doc of RTCSessionDescription
  • doc: improve the API doc of RTCDataChannel
  • doc: Improve the API doc of RTCConfiguration
  • doc: Improve the API doc of RTCRtpEncodingParameters
  • doc: Improve the API doc of RTCRtpSender
  • doc: Improve the API doc of RTCRtpTransceiver
  • doc: Improve the API doc of WebRTC
  • doc: Improve the API doc of AudioStreamTrack
  • doc: Improve the API doc of VideoStreamTrack
  • doc: Improve the API doc of MediaStreamTrack
  • doc: Improve the API doc of MediaStream
  • doc: Improve the API doc of RTCPeerConnection
  • doc: Improve the API doc of RTCIceServer

[3.0.0-pre.7] - 2023-10-20

Added

  • Add Android x86_64 support experimentally.
  • Add an property .CanTrickleIceCandidates in RTCPeerConnection class.
  • Add an configurable logger in WebRTC class.
  • Support scale resolution for NVIDIA H.264 codec.
  • Support simulcast for NVIDIA H.264 codec.
  • Add an property SyncApplicationFramerate in RTCRtpSender class to improve latency of video streaming.

Changed

  • Upgrade libwebrtc M116.
  • Change Android API minimum level to 23 because the API level 22 is obsoleted on Unity2020.3 LTS.
  • Add RTCDataChannel.onError event.
  • Change a constructor of VideoStreamTrack to make simple to flip video texture.

Fixed

  • Fix an issue when setting a scale factor of video encoding to a fractional scaling ratio.
  • Fix an occasional crash issue when using hardware encoder with D3D11 graphic device.
  • Fix an crash when nvEncodeAPI64.dll is not found on Windows.
  • Optimize audio sampling when using mute.

[3.0.0-pre.6] - 2023-07-16

Added

  • Add AudioStreamTrack.onReceived delegate which fetch audio buffers from other peers.

Changed

  • Upgrade libwebrtc M112.

Fixed

  • Improve video encoding performance for DX11/DX12 which decrease the loads on the rendering thread.
  • Fix a runtime error when replacing track with NvCodec.
  • Support calling AudioStreamTrack.SetData on worker thread
  • Fix an issue in a VideoReceive sample scene which a video streaming doesn't work from camera device on Android since Unity 2022.1.

Removed

  • Remove Obsolete methods in WebRTC class.

    • WebRTC.Initialize
    • WebRTC.Dispose

  • Remove Obsolete methods in RTCConfiguration class.

    • RTCConfiguration.enableDtlsSrtp

[3.0.0-pre.5] - 2023-04-28

Added

  • Add Encoded Transform API.
  • Add RTCRtpReceiver.GetContributingSources method.
  • Add Metadata and Encrypt into package sample.

Changed

  • Upgrade NVIDIA Codec SDK 12.0.
  • Change to send SPS and PPS when using the encoder of NVIDIA video codec.

Fixed

  • Fix unhandled NVENCException's occurring during initialization & reconfigure calls when using NVIDIA video codec.
  • Fix crash on dedicated Linux Server.
  • Fix a performance issue of video streaming with Unity 2022.2

[3.0.0-pre.4] - 2023-01-28

Fixed

  • Fix KeyNotFoundException in RTCPeerConnection when firing the callback after disposing the its instance.
  • Fix crash when streaming high resolution video on Android device.
  • Fix memory leak on macOS/iOS when streaming high resolution video.

[3.0.0-pre.3] - 2022-12-16

Fixed

  • Fix the crash when launching Unity Editor on a command line with -nographics option.

[3.0.0-pre.2] - 2022-12-09

Changed

  • Upgrade libwebrtc M107.
  • Change that invoking initialization process automatically just after launching Unity Editor.
  • Obsolete WebRTC.Initialize and WebRTC.Initialize.

Fixed

  • Fix not displaying profiling result of encoding thread on Unity Profiler on macOS.
  • Fix stopping at first received frame for seconds when using H264 codec.
  • Fix the crash when streaming video which resolution is small on macOS Apple Silicon.
  • Fix the freeze when using over WQHD (2560×1440) resolution on Ubuntu 20.04.

Removed

  • Finish Bitcode support.
  • Finish Unity 2019.4 support.

[3.0.0-pre.1] - 2022-10-28

Changed

  • Add AudioStreamTrack constructor to set AudioListener.
  • Change WebRTC.Initialize method to not throw exception when using OpenGL Core on Windows or macOS.
  • Remove dependency libc++.so.1 in Linux native plugin

Fixed

  • Fix SetRemoteDescription and SetLocalDescription method of RTCPeerConnection class to work correct when calling multiple at the same time.

[2.4.0-exp.11] - 2022-09-28

Changed

  • Add ValidationExceptions.json to suppress warnings about the package validation.
  • Stop to use flip shader so that removing Resources folder.
  • Change parameter of VideoStraamTrack.CaptureStreamTrack method.

Fixed

  • Fix a bug when calling GetStats method multiple times at the same time.

[2.4.0-exp.10] - 2022-08-09

Fixed

  • Fix crash when streaming video between different platforms.

[2.4.0-exp.9] - 2022-08-01

Fixed

  • Fix the crash bug on Android devices like pixel4a when using Vulkan.

[2.4.0-exp.8] - 2022-07-08

Added

  • Supported video encoding framerate control.
  • Added the items in Profiler Window to show the CPU loads of video encoding/decoding thread.
  • Add a new sample "ReplaceTrack" to demonstrate RTCRtpSender.ReplaceTrack method.

Changed

  • Changed arguments of RTCPeerConnection.AddTransceiver method to pass initial information of RTCRtpTransceiver when instanting it.

Fixed

  • Fixed the crash because of the old version of NVIDIA graphics driver.
  • Fixed the issue when garbage collected but the finalizer hasn't been called.
  • Improved performance of video streaming when using Vulkan graphics API.

[2.4.0-exp.7] - 2022-05-20

Added

  • Supported Unity 2021.3 LTS.
  • Added clang-format file.
  • Added CMakePresets.json file.
  • Supported NVIDIA decoder for H264 codec.
  • Added the codec selection option and video resolution option in the menu scene.

Changed

  • Moved CPU loads of the color conversion from the rendering thread to the worker thread.
  • Upgraded NVIDIA Codec SDK 11.0.

Fixed

  • Removed unnecessary dependencies of the native plugin on Linux.

Removed

  • Removed an argument EncoderType for WebRTC.Initialize method.
  • Removed WebRTC.HardwareEncoderSupport method.

[2.4.0-exp.6] - 2022-02-24

Fixed

  • Fixed a crash bug where disposing AudioStreamTrack on a receiver side.

[2.4.0-exp.5] - 2022-02-02

Added

  • Added the ability to execute pending native tasks manually from the main thread.
  • Added support for sending basic native collections (NativeArray<T>, NativeSlice<T> and NativeArray<T>.ReadOnly) to RTCDataChannel.
  • Added a property RTCRtpTransceiver.Mid.
  • Added an argument enableNativeLog for WebRTC.Initialize method.
  • Added "E2ELatency" scene in the sample.
  • Added a constuctor without arguments in AudioStreamTrack class.

Changed

  • Upgraded libwebrtc M92.
  • Changed compiler for native plugin on Windows (MSVC to Clang).
  • Changed to use OnAudioFilterRead method in MonoBehaviour for audio rendering.
  • Changed resizing texture dynamically on receiver side when using a property scaleResolutionDownBy in RTCRtpEncodingParameters class.
  • Changed the exception type ObjectDisposedException when accessing instance after call Dispose method.

Fixed

  • Fixed a crash bug where initializing video streaming on Unity Editor on Apple Silicon.
  • Fixed a crash bug where configuring OpenGL Core as a graphics API on Unity Editor on windows.
  • Fixed a bug that sending stereo audio produces mono clip on some peers.
  • Fixed a crach bug where using Full HD resolution with HWA enabled on macOS(Intel).
  • Fixed a crash bug where using Full HD resolution with HWA enabled on Windows.

Removed

  • Removed iOS Simulator (x86_64) support for make simple building process for iOS.

[2.4.0-exp.4] - 2021-08-19

Added

  • mac M1 architecture native support
  • Audio stream rendering support
  • Add two scenes ("Audio" and "MultiAudioReceive") into the package sample
  • Add RTCAudioSourceStats and VideoSourceStats class

Changed

  • Add the audio waveform graph to "MultiplePeerConnections" scene in the sample

Fixed

  • Fix the crash on Windows with Vulkan API on the "VideoReceive" sample
  • Fix the crash when calling WebRTC.Initialize twice
  • Fix the error in the build process on Unity2021.2

[2.4.0-exp.3] - 2021-06-08

Changed

  • Add options of the incoming video in "VideoReceive" sample to test video capture modules on the device

Fixed

  • Fix the validation for the color space of the incoming video
  • Fix the crash when accessing the property RTCRtpSender.Track

[2.4.0-exp.2] - 2021-05-21

Fixed

  • Fix the color space of the RenderTexture for streaming when using Vulkan API
  • Fix sample scenes
  • Add a short version string to info.plist of ios framework

Changed

  • Add the validation of the streaming texture size on Android
  • Add the validation of the streaming when using NvCodec
  • Use the software video decoder when disabling hardware acceleration

[2.4.0-exp.1] - 2021-04-23

Added

  • Android ARM64 platform support
  • Added a sample scene "Menu" which developers can go back and forth between sample scenes
  • Added a sample scene "PerfectNegotiation"
  • Added the software encoder on Linux support when using OpenGL Core graphics API
  • Added the RestartIce method to the RTCPeerConnection class
  • Added the Streams property to the RTCRtpReceiver class

Changed

  • Unity 2020.3 support
  • Upgrade libwebrtc m89
  • Changed the argument type of the RTCPeerConnection.CreateOffer method and the RTCPeerConnection.CreateAnswer method

Fixed

  • Fixed crash for accessing properties of RTCDataChannel instance
  • Fixed crash when using the invalid graphics format to stream video on macOS

[2.3.3-preview] - 2021-02-26

Added

  • Added OnConnectionStateChange event to the RTCPeerConnection class

Fixed

  • Fixed a crash bug that occurs when accessing MediaStreamTrack properties after disposing of RTCPeerConnection

[2.3.2-preview] - 2021-02-12

Changed

  • Changed Audio.CaptureStream method to allow setting of audio track label.

Fixed

  • Fixed memory leaks in native code.
  • Fixed a crash bug when access an instance after disposed of it.
  • Fixed MediaStream.GetVideoStreamTrack method and MediaStream.GetVideoStreamTrack method to return a correct value.
  • Fixed RTCRtpTransceiver.Receiver property and RTCRtpTransceiver.Sender property to return a correct value.

[2.3.1-preview] - 2021-01-07

Fixed

  • Fixed RTCIceCandidate.candidate property in order to return a correct SDP formatted string.

[2.3.0-preview] - 2020-12-28

Added

  • Supported iOS platform
  • Supported H.264 HW decoder (VideoToolbox) on macOS
  • Added GetCapabilities method to the RTCRtpSender class and the RTCRtpReceiver class
  • Added SetCodecPreferences method to the RTCRtpTransceiver class
  • Added two samples ("ChangeCodecs", "TrickleIce")
  • Added properties to the RTCIceCandidate class
  • Added properties tp the RTCDataChannelInit class

Changed

  • Changed RTCIceCandidate type from struct to class
  • Changed RTCIceCandidateInit type from struct to class
  • Changed RTCDataChannelInit type from struct to class
  • Changed argumments of the RTCPeerConnection.AddIceCandidate method
// old
public void AddIceCandidate(ref RTCIceCandidate candidate);
// new
public bool AddIceCandidate(RTCIceCandidate candidate);
  • Changed arguments of the RTCPeerConnection.CreateDataChannel method
// old
public RTCDataChannel CreateDataChannel(string label, ref RTCDataChannelInit options);
// new
public RTCDataChannel CreateDataChannel(string label RTCDataChannelInit options = null);

[2.2.1-preview] - 2020-11-13

Added

  • Added a "Bandwidth" sample

Fixed

  • Fixed the receiver of video streaming with Vulkan API
  • Fixed a crash bug when the application ended using Vulkan API
  • Fixed a crash bug of the standalone build using Vulkan API
  • Fixed bugs that occur on Linux not installed NVIDIA driver
  • Fixed a bug of the "VideoReceive" sample

[2.2.0-preview] - 2020-10-26

Added

  • Software decoder support
  • Hardware encoder (VideoToolbox) support on macOS
  • Vulkan API support on Linux and Windows
  • Linux IL2CPP support
  • Add WebRTC samples ("MultiplePeerConnections", "MultiVideoReceive", "MungeSDP", "VideoReceive")

Changed

  • Upgrade libwebrtc m85
  • Upgrade NVIDIA Codec SDK 9.1
  • Changed RTCPeerConnection behaviour to throw exceptions when pass invalid arguments to SetLocalDescription, SetRemoteDescription

[2.1.3-preview] - 2020-09-28

Changed

  • Add "minBitrate" parameter to RTCRtpEncodingParameters class.

[2.1.2-preview] - 2020-09-14

Changed

  • Erase Japanese documentation due to migrating to internal translation system.

[2.1.1-preview] - 2020-09-11

Fixed

  • Fixed an issue where the RTCRtpSender.SetParameters API did not work properly
  • Removed ZWSP(zero-width-space) in C# code

[2.1.0-preview] - 2020-08-24

Added

  • Added statistics window in Unity editor to allow checking the operation of WebRTC
  • Added RTCPeerConnection.GetStats API which collect statistics of WebRTC
  • Added RTCRtpSender.SetParameters and RTCRtpSender.GetParameters to adjustment streaming video quality
  • Added RTCDataChannel.ReadyState which shows the state of the channel

Fixed

  • Fixed a issue which video stream remains with bad quality after a short network degradation

[2.0.5-preview] - 2020-07-30

Fixed

[2.0.4-preview] - 2020-07-10

Fixed

  • Fix a crash bug when dispose a video track

[2.0.3-preview] - 2020-06-05

Fixed

  • Fix the memory leak when using DirectX12

[2.0.2-preview] - 2020-05-14

Fixed

  • Fix the crash when using the incorrect parameter to as the argument of RTCDataChannel constructor
  • Fix the crash when initializing the hardware encoder failed
  • Fix the editor freeze bug when recompiling scripts
  • Fixed documents

[2.0.1-preview] - 2020-05-01

Fixed

  • Fixed versioning issue

[2.0.0-preview] - 2020-04-30

Added

  • Multi camera support
  • DirectX 12 API support
  • Published VideoStreamTrack API
  • Published AudioStreamTrack API

[1.1.2-preview] - 2020-03-19

Fixed

  • Fix OpenGL color order

[1.1.1-preview] - 2020-02-28

Fixed

  • Fix DLL import error

[1.1.0-preview] - 2020-02-25

Added

  • IL2CPP support
  • Linux OpenGL hardware encoder support
  • Mac OS Metal software encoder support
  • Windows DirectX11 software encoder support

Changed

  • Changed Audio.Update method to public

[1.0.1-preview] - 2019-09-22

Fixed

  • Fixed documents

[1.0.0-preview] - 2019-08-22

Added

  • Added tooltips

Changed

  • Renamed sample folders

[0.2.0-preview] - 2019-07-30

Changed

  • Output logs when NVCodec failed to initialize

[0.1.0-preview] - 2019-07-02

  • Initial Release