A Node.js script that helps you to record incoming TeamViewer session
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README.md
monitor.js

README.md

TeamViewer Incoming Recorder

A Node.js script that helps you to record incoming TeamViewer session.

TeamViewer can record outcoming connection, and allows to record automaticly. However TeamViewer doesn't provide an option to record incoming connection from hosted workstation. If the computer enables unattended access, you can get only a little information from log file of TeamViewer, but don't know what the incoming user did on the computer.

The script helps you to check if there is a incoming connection, and record the screen automaticly so that you can check what did he do.

Required Environment

  • Node.js 4.8.0+
  • FFmpeg Executable Binary
  • Also TeamViewer

Note: Enable logging from TeamViewer is requied, please make sure you have enabled logging and logging incoming connections. Check it out at TeamViewer Options -> Advanced -> Log files.

Supports

Should support Windows, Linux and OS X, but I only tested it on Windows, for I can't run the Linux and OS X binaries by some dependence errors. If you have any bugs, please open an issue.

How It Works

The script will watch the TeamViewer log directory. If the log file was modified, the script will read the modified parts and check if it contains the keywords about start or finished incoming connection. If yes, it will execute FFmpeg to start recording, and stop recording when connection finished.

How To

$ node monitor.js [--options]

Options

All the options should have a prefix of -- and use = to split option name and its value like --foo=bar.

For the value that contains whitespace, you can use quotes "..." or '...' to set them.

If you need to use some variables from environment variables, like getting system username, you can use backticks `...` like template literals and ${} as the variable that in process.env, the system's environment variables. For example, to set --logFilePath for TeamViewer 11 on Linux, you can use --logFilePath=`/var/log/teamviewer11/${USER}/TeamViewer11_Logfile.log`, and ${USER} will be replaced as process.env.USER, the variable USER in system's environment variables.

--config

Default: null

The specific configuration file. The priority of the file is higher than default config but lower than the options that passed from command line.

Note: All the commands that in the file don't need to add -- prefix, and the latter options will overwrite the previous same options.

Example:

logFilePath="C:/Program Files/TeamViewer/TeamViewer11_Logfile.log"
FFmpegPath=D:/foo/bar/ffmpeg.exe
outputDir=D:/bar/foo/

--logFilePath

Default:

  • Windows: C:/Program Files (x86)/TeamViewer/TeamViewer12_Logfile.log
  • Linux: /var/log/teamviewer12/${process.env.USER}/TeamViewer12_Logfile.log
  • OS X: ~/Library/Logs/TeamViewer/TeamViewer12_Logfile.log

The location of log file of TeamViewer.

For Windows it mostly at where you install TeamViewer, Linux at /var/log/teamviewer12/[System Username]/, and OS X at ~/Library/Logs/TeamViewer/. If you find it incorrect, please correct it with this option, and you can also consider open an issue.

The default file name is for TeamViewer 12, if you are using another version, don't forget to change it.

--incomingFilePath

Default:

  • Windows: C:/Program Files (x86)/TeamViewer/Connections_incoming.txt
  • Linux: /var/log/teamviewer12/Connections_incoming.txt
  • OS X: ~/Library/Logs/TeamViewer/Connections_incoming.txt

The location of log file of incoming connections from TeamViewer.

For Windows it mostly at where you install TeamViewer, Linux at /var/log/teamviewer12/, and OS X at ~/Library/Logs/TeamViewer/. If you find it incorrect, please correct it with this option, and you can also consider open an issue.

--FFmpegPath

Default: ffmpeg

The path to FFmpeg executable binary.

Note: The path should point to the specific FFmpeg binary, not the directory. If FFmpeg is in the same folder with monitor.js, define it as ./ffmpeg if you are in Linux or OS X.

--outputDir

Default: ./

The directory to save the recorded videos.

Note: Please make sure the value is end with /.

--outputFileName

Default: ${ct}-${dt}-${id}${name}.mp4

The file name of the videos.

${ct} means the connected time, ${dt} means the disconnected time, ${id} means the incoming TeamViewer ID and ${name} means the incoming TeamViewer username if available.

You can define the format of time with --dateFormat, which is YmdHis by default.

Note: When recording video, the temp file name of video is tmp_${ct}.mp4.

Example of output by default: 20170227110111-20170227110207-123456789(ccloli).mp4

--fps

Default: 5

The framerate (fps) of output videos.

A higher fps will get a smoother video, but the bitrate for each frame will be smaller. For monitoring, less than 10 fps is enough.

--bitrate

Default: 2000000

The bitrate (bps) of output videos.

Choose a higher bitrate will get better video quality, and a lower bitrate will get smaller video but would drop frames.

Not only the number, but you can also try 500k, 2m and ntsc for easy understanding which is supported by FFmpeg.

Note: Higher bitrate will makes the video file too large, the file size should be [bitrate] / 8 bytes/secod, or say [bitrate] / 1000 / 1000 / 8 MB/s. For recording monitor, less than 2Mbps is okay. From my test, video with 500Kbps, 1080P and ultrafast can be seen clearly and can be used in most situation. Anyway, TIY and get the best configuration.

--videoDeviceIndex

Default:

  • Windows: Not available, use --offsetX, --offsetY and --videoSize to crop the screen area.
  • Linux: 0.0
  • OS X: default

The video device (monitor) index of your device list.

By default, it will record all your monitors on Windows, the first monitor on Linux and the main monitor on OS X.

For Linux the format of value is [hostname]:display_number.screen_number[+x_offset,y_offset].

hostname:display_number.screen_number specifies the X11 display name of the screen to grab from. hostname can be omitted, and defaults to "localhost". The environment variable DISPLAY contains the default display name.

x_offset and y_offset specify the offsets of the grabbed area with respect to the top-left border of the X11 screen. They default to 0.

For OS X the format of value is the device index or the name of device. To get the list of devices, run ffmpeg -f avfoundation -list_devices true -i "".

Note: However if you are on Windows, you can't use this options, but you can use offset to crop the area of which screen you want.

--offsetX

Default: null

Defines the X start position of cropped area.

Note: Not available on OS X.

--offsetY

Default: null

Defines the Y start position of cropped area.

Note: Not available on OS X.

--videoSize

Default: null

Defines the cropped size of cropped area (video frame size).

The format value should be [x]x[y] likes 1024x768, 1920x1080 or the name of standard size likes vga, hd720.

Note: it would probably occur an error if the video size exceed the screen available size.

--preset

Default: ultrafast

Defines the preset of x264.

Available values are ultrafast, superfast, veryfast, faster, fast, medium, slow, slower, veryslow, which controls the encoding speed.

Note: A slower speed will get better video quality at the same bitrate, but will also cost more CPU and RAM resource or even drop frames. Change it only if you have a good reason.

--scale

Default: null

The frame size of output video.

By default the output video size it's the same as --videoSize (raw). The format value should be [x]x[y] likes 1024x768, 1920x1080 or the name of standard size likes ntsc, vga, hd720.

--FFmpegExtraArg

Default: null (empty string)

Extra options that will be passed to FFmpeg if you want.

You can also use this option to overwrite default FFmpeg options. The default FFmpeg options can be seen in Default FFmpeg Command section.

Note: If you defines the -vf options, the --scale option will be overwrited. If you also need to scale the video, use -vf scale=[scale-size],[your -vf options]

--dateFormat

Default: YmdHis

The format of date that will be used in output file name.

Available options are:

  • Y: Full year, 4 digits (e.g. 2017)
  • y: Short year, 2 digits (e.g. 17)
  • m: Month, 2 digits (e.g. 03)
  • n: Month, 1 or 2 digits (e.g. 3)
  • d: Date, 2 digits (e.g. 04)
  • H: Hours, 2 digits (e.g. 08)
  • G: Hours, 1 or 2 digits (e.g. 8)
  • i: Minutes, 2 digits (e.g. 05)
  • s: Seconds, 2 digits (e.g. 01)
  • I: Milliseconds, 3 digits (e.g. 015)
  • U: Unix timestamp (e.g. 1488618415)

Note: The time value depends on the timezone from local machine.

--debugLevel

Default: 1

The details that will output on console.

The level can be chosed between 0 to 3. 0 is no output, 1 is minimum detail and 3 is maximun detail.

Default FFmpeg Command

As mentioned, the script needs FFmpeg to record screen. For different system, it'll use different FFmpeg devices to get video devices. Windows uses gdigrab, Linux uses x11grab and OS X uses avfoundation. For more information, see the documentation of FFmpeg-device.

So here is the FFmpeg command that will be executed when recording video. You can use --FFmpegExtraArg to overwrite them, as FFmpeg allows same option with multiple values but only the last one will be used.

  • Windows:
     "${FFmpegPath}" -f gdigrab -framerate ${fps} \  
         -offset_x ${offsetX} -offset_y ${offsetY} -video_size ${videoSize} \  
         -i desktop -vcodec libx264 -b:v ${bitrate} -vf scale=${scale} \  
         -preset ${preset} ${FFmpegExtraArg} "${outputDir}tmp_[${dateFormat}].mp4"
  • Linux:
     "${FFmpegPath}" -f x11grab -framerate ${fps} \  
         -grab_x ${offsetX} -grab_y ${offsetY} -video_size ${videoSize} \  
         -i ${videoDeviceIndex} -vcodec libx264 -b:v ${bitrate} -vf scale=${scale} \  
         -preset ${preset} ${FFmpegExtraArg} "${outputDir}tmp_[${dateFormat}].mp4"
  • OS X:
     "${FFmpegPath}" -f avfoundation -framerate ${fps} \  
         -video_size ${videoSize} -i "${videoDeviceIndex}:none" -capture_cursor 1 \  
         -capture_mouse_clicks 1 -vcodec libx264 -b:v ${bitrate} -vf scale=${scale} \  
         -preset ${preset} ${FFmpegExtraArg} "${outputDir}tmp_[${dateFormat}].mp4"

License

Licensed under the MIT License.