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Flipping video data in JavaScript

  • 10-10-2018 1:50pm
    #1
    Registered Users, Registered Users 2 Posts: 8


    Hi. I'm using a js library to record videos from a webcam. I display the webcam stream in a <video> element and flip it in css:
    rotateY().

    When the library finishes recording, it creates a data URI.
    The video is then saved but isn't flipped. How did I "flip" the data URI?

    I hope I made sense.
    Thanks in advance.


Comments

  • Registered Users, Registered Users 2 Posts: 2,015 ✭✭✭colm_c


    You're flipping the display of the video, not the video itself.

    Unless you can get the js library to do it, or even the webcam to do it, unlikely to do with with css...


  • Registered Users, Registered Users 2 Posts: 8 Alex Nuzum


    That's what I was trying to explain. Do you know any libraries. I couldn't find any. If I do though I'll post it here., others must surely have this problem.


  • Closed Accounts Posts: 260 ✭✭rd1izb7lvpuksx


    Do you want to do this serverside or in the browser? If serverside, then use ffmpeg to hflip or vlip it - there even a JS port (https://github.com/Kagami/ffmpeg.js). It'll be a lot more awkward to do clientside.


  • Registered Users, Registered Users 2 Posts: 568 ✭✭✭rgodard80a


    Alternatively, some IP cameras / webcams have an admin page/controls to alter brightness, contrast etc.

    And they may have a setting to flip the video for you at source.


  • Registered Users, Registered Users 2 Posts: 8 Alex Nuzum


    Thanks. I'll look into ffmpeg


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