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Regame - Cloud Gaming Engine

简体中文 | English

Regame - Cloud Gaming Engine is a set of technologies developed by Edge computing team of Ksyun to serve the cloud game scene.

Cloud gaming is a method of playing video games that is done using remote hardware. You don't have to download or install games locally, just begin playing the game immediately because it is being run on remote servers.

Cloud gaming engine is a core technology to host ordinary games on remote server and start cloud gaming service.

Regame is still under development. It would be great if you could help.

Download Regame v0.4 here

Demo videos (Chinese):

1. Requirements


Target Minimum Recommended
System Windows 7 and later Windows 10, 11
GPU NVIDIA GPU GTX 1080Ti, RTX 2070S tested
Software GeForce Experience latest GeForce Experience
Driver GeForce Game Ready Driver latest GeForce Game Ready Driver


Target Minimum Recommended
System Windows 7 and later Windows 10, 11
CPU ANY amd64

2. Basic

  • cgh use Hook technology to capture image, support most of DirectX games, such as Cyberpunk 2077, Street Fighter.

  • cge use FFmpeg to encode audio and images cgh captured into streaming.

  • cgc use FFmpeg to decode audio and video frames, and use SDL2 to play audio and show images.

Data Flow

3. QuickStart



The Cloud Gaming Engine.

You can launch cge directly, which will apply default options.

Run cge --help to see all options:

KSYUN Edge Cloud Gaming Engine v0.4 Beta

  -h [ --help ]                  Produce help message
  --audio-bitrate arg (=128000)  Set audio bitrate
  --audio-codec arg (=libopus)   Set audio codec. Select one of {libopus, aac,
  --bind-address arg (=::)       Set bind address for listening. eg:
  --disable-keys arg             Disable scan codes. eg: 226,230 disable ALT;
                                 227,231 disable WIN
  --donot-present arg (=0)       Tell cgh don't present
  --hardware-encoder arg         Set video hardware encoder. Select one of
                                 {amf, nvenc, qsv}
  --gamepad-replay arg (=none)   Set gamepad replay method. Select one of
                                 {none, cgvhid, vigem}
  --keyboard-replay arg (=none)  Set keyboard replay method. Select one of
                                 {none, cgvhid}
  --mouse-replay arg (=none)     Set mouse replay method. Select one of {none,
  --log-level arg (=info)        Set logging severity level. Select one of
                                 {trace, debug, info, warning, error, fatal}
  -p [ --port ] arg (=8080)      Set the service port
  --video-bitrate arg (=1000000) Set video bitrate
  --video-codec arg (=h264)      Set video codec. Select one of {h264, h265,
                                 hevc}, h265 == hevc
  --video-gop arg (=180)         Set video gop. [1, 500]
  --video-preset arg             Set preset for video encoder. For AMF, select
                                 one of {speed, balanced, quality}; For NVENC,
                                 select one of {p1, p2, p3, p4, p5, p6, p7,
                                 slow, medium, fast}; For QSV, select one of
                                 {veryfast, faster, fast, medium, slow, slower,
                                 veryslow}; otherwise, select one of
                                 {ultrafast, superfast, veryfast, faster, fast,
                                 medium, slow, slower, veryslow, placebo}
  --video-quality arg (=23)      Set video quality. [0, 51], lower is better, 0
                                 is lossless

You can press Ctrl+C to stop it gracefully.


cge uses regame-authenticator to verify login.



Some hook dlls for capturing pictures from D3D game.


A tool for injecting hook dll into game process.

Hook game

Allowed options:
  -h [ --help ]              Produce help message
  -d [ --dynamic ] arg       Use dynamic injecting
  -e [ --exec ] arg          Path of the executable
  -a [ --arg ] arg           Arguments of the executable
  -c [ --cd ] arg            Current directory for the executable
  -i [ --imagename ] arg     Image name of the process being injected.
  -w [ --wait ] arg (=1,000) Wait before injecting. unit: ms
  --lx86 arg                 Path of x86 library to inject into process
  --lx64 arg                 Path of x64 library to inject into process


Cloud gameing Virtual HID driver. For replaying controller event on server.

Hook game


Cloud gameing Virtual Indirect Display Driver. For capturing screen on server.


A tool for testing. Just run it, and it will generate simple pictures and write them as video frames to shared memory, then notify cge to fetch. You can use cgc to see these pictures.

It also can be used to test latency.

Video Reference (Chinese):


A simple client to work with cge.

Ksyun Edge Cloud Gaming Client v0.3 Beta

  -h [ --help ]                         Produce help message
  --audio-frame-delay arg (=2)          Set audio frame max delay, [0, 8]
  -f [ --fullscreen-state ] arg (=none) Set fullscreen state, can be one of
                                        {none, real, fake}
  -l [ --list-hardware-decoder ]        List hardware decoder
  -d [ --hardware-decoder ] arg         Set hardware decoder
  -r [ --remote-host ] arg (= Set remote host
  -p [ --remote-port ] arg (=8080)      Set remote port
  --top-most arg                        Keep the main window always on top
  -u [ --username ] arg                 Set username
  --verification-code arg               Set verification code
  --volume arg (=100)                   Set volume, [0, 100]


A WebRTC server works together with cge, to serve web clients.

4. Setting Up Your Build Environment

4.1 VS2019

Reference .vsconfig


4.2 Boost

Install Boost and set BOOST_ROOT environment variable to install directory. Details

Boost compile command:

# For MTRelease configuration
.\b2 --address-model=64 runtime-link=static

Video Reference (Chinese):

4.3 FFmpeg

Set FFMPEG_ROOT environment variable to the path of your FFmpeg directory. LGPL shared is recommended.

The folder tree should be like:

│  ├─libavcodec
│  ├─libavdevice
│  ├─libavfilter
│  ├─libavformat
│  ├─libavutil
│  ├─libpostproc
│  ├─libswresample
│  └─libswscale

Video Reference (Chinese):

4.4 SDL

Set SDL2_ROOT environment variable to the path of your SDL2 directory.

The same as SDL_ttf 2.0.

The folder tree should be like:

│  └─SDL2

4.5 WDK

Required by cgvhid, cgvidd.

4.6 Extra

DbgView: Included in Sysinternals Suite

5. Building and Testing

git clone https://github.com/ksyun-kenc/liuguang
cd liuguang
git submodule update --init

Open each solution file with VS, prefer to select MTRelease configuration, then build.

Test steps:

  • Run cge on server.

  • Run video_source on server.

  • Run cgc -r <server_address> on anther PC as long as it can access the server over the network.

Test with games:

Assume you want to test USF4.

  • Install cgvhid on server. Details

  • If you prefer gamepad to keyboard, install ViGEmBus on server. Download

  • Run cge --keyboard-replay=cgvhid --gamepad-replay=vigem on server.

  • Run cgi -d true -e SSFIV.exe -i SSFIV.exe --lx86 .\captureyuv.dll on server.

  • Run cgc -r <server_address> on anther PC as long as it can access the server over the network.

Note that only support D3D9, D3D11, D3D12 games now.

Video Reference (Chinese):

6. Contact Us

WeChat: UMUTech

  • Please have "regame" or "liuguang" included in friend request.

  • Will be more efficient if you could tell me the name of your company.

  • Individual develops are also welcome.

7. Known Users


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