ffmpeg-node-capture

Node package with ffmpeg bindings.

Note

• Add #define AUDIO_MIX_DEV macro in src/FFmpefCaptureWrapper.h#L25 into the Audio Mix Dev mode, otherwise cancel!
• crop 裁剪的尺寸中 width 和 height 必须都是 16 的倍数（mac要求，win待测试）
• crop 裁剪的尺寸
  • 对于 windows 版, width 和 height 必须是 4 的倍数, 以左上为O点，向右为x轴正方向，向下为y轴正方向
  • 对于 mac 版 , width 和 height,必须是 16 的倍数，以左下为O点，向右为x轴正方向，向上为y轴正方向（已在代码中转换为和windows一致等坐标系）

Dependency

• Node >= 7.0.0
• node-gyp
  • sudo npm install node-gyp
• Virtual device driver
  • screencapturer for windows

  cd drivers/screencapturer
  ./install.bat
  

  • Soundflower-2-0b2.dmg for OSX
    1. cd drivers/soundflower && bash ./install.sh
    2. open "Audio MIDI Setup"
    3. http://www.jianshu.com/p/a8ff665285de

Compile

cd /path/to/ffmpeg-node-capture
node-gyp configure
node-gyp build
 
# publish
npm version patch
npm publish
git push
 
#http://192.168.0.113:4873/#/
#在这里看ffmpeg-node-capture已经1.0.10，就说明好了
 

Features

• Capture Webcam.
• Capture Display.
• Overlay display and webcam.
• Capture Microphone.
• Capture System Sound.

Basic Usage

const ffmpegCapture = require('ffmpeg-node-capture');
const attached = ffmpegCapture.Display.attach();
 
 
ffplay -f rawvideo -pixel_format yuv420p -video_size 1024x768 -i display-1024x768.yuv
ffmpeg -hide_banner  -f avfoundation -list_devices true -i ""
 

Options

• outputWidth: 320
• outputHeight: 240
• mode: 'webcam'
• framerate: 15
• webcam
  • deviceName: "",
  • deviceIndex: 0,
  • pixelFormat: "",
  • framerate: 15,
  • width: "",
  • height: ""
  • forceDisplayRatio: false
• display
  • offsetX: 0,
  • offsetY: 0,
  • cropWidth: 0,
  • cropHeight: 0,
  • scaleFactor: 1 // can not greater than 1.
  • displayIndex: 0
  • framerate: 15,
  • pixelFormat: ""
  • width: "",
  • height: "",
  • captureCursor: false,
  • captureClick: false // mac only.
  • forceDisplayRatio: false
• overlay
  • webcamX:
  • webcamY:
  • webcamWidth:
  • webcamHeight:

API

FFmpegCaptureWrapper.listWebcam(): list all webcams, and their capability.

[
  {"name": "", "capabilities": [{maxFramerate: 30, minFramerate: 15, width: 320, height: 240, pixelFormat: "yuyv422"} ...]}
]

FFmpegCaptureWrapper.listDisplay(): list all displays, and their capability.

[
  {"name": "", "capabilities": [{width: 320, height: 240, pixelFormat: "yuyv422"} ...]}
]

new FFmpegCaptureWrapper():

create a ffmpeg capture stream.

stream.open([options]):

open capture stream.

stream.close():

close capture stream.

stream.update([options]):

update options.

open event (data, width, height):

emit when stream opened successfully.

error event (err) :

emit when something wrong.

close event:

emit when close stream.