https://github.com/mmis1000/nodejs-video-frame-extractor

extract frame as rbg from output of ffmpeg
https://github.com/mmis1000/nodejs-video-frame-extractor

Last synced: about 2 months ago
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extract frame as rbg from output of ffmpeg

• Host: GitHub
• URL: https://github.com/mmis1000/nodejs-video-frame-extractor
• Owner: mmis1000
• Created: 2015-06-05T13:50:51.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2018-11-27T04:42:37.000Z (about 6 years ago)
• Last Synced: 2024-04-14T22:53:54.161Z (9 months ago)
• Language: CoffeeScript
• Size: 7.81 KB
• Stars: 1
• Watchers: 1
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
###Nodejs Video Frame extractor

split rgb24 stream into frames

------

usage:

    class Extractor

      constructor: new Extractor stream, width, height

        stream : any stream, file stream is also ok

        width  : width  of video

        height : height of video

      

      event:

        frame (Image)

          emit when every frame finished

    

    # since raw rgb24 stream doesn't have header, 

    # it is impossiple to detect the real size of video automatically

      

    class Image

      constructor: rgbBuffer, width, height

      constructor: width, height

      

      methods: 

        getPixel: (x, y)

        setPixel: (x, y, color)

        addPixel: (x, y, color)

      

      propertys:

        buffer: buffer contains pixel data

        width : width of image

        height: height of image

        length: length of internal buffer

    

    # the color is a array contains r, g ,b value

      

------

generate test.rgb `by ffmpeg` for test

`cat [yourvideo] | ffmpeg -i -  -vcodec rawvideo -qp:v 0 -pix_fmt rgb24 -r "2" -vf scale=320:240 -f rawvideo pipe:1 > test.rgb`

run test by `coffee test.coffee`