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• How to do HTML 5 video with Flash-free fallback for IE 8

  10 octobre 2013, par forthrin

  I need a simple and clean Flash-free, cross-browser solution for embedding video in a Web page. I came up with the solution below, and wish to hear if someone can improve it even further, including :

  1. Can the method show a still image while buffering the video ?
  2. Can someone verify those conditional comments ? downlevel-hidden and downlevel-revealed got me a bit confused :)

  Video converting as follows (using WMV for IE 8, WEBM for Firefox, and H264 for the rest) :

  ffmpeg -i video.mov -b 3000k -vcodec wmv2   -acodec wmav2     -ab 320k -g 30 out.wmv
  
  ffmpeg -i video.mov -b 3000k -vcodec libvpx -acodec libvorbis -ab 320k -g 30 out.webm

  Markup (using conditional comments to create a fallback to IE 8 users) :

  <video controls="true" autoplay="true" poster="video.jpg">
  
    <source src="video.mov" type="video/quicktime"></source>
  
    <source src="video.webm" type="video/webm"></source>
  
  </video>

• Writing Live-Multimedia-Application using OpenGL & Co. saving output to disc [closed]

  21 janvier 2013, par user1997286

  I want to write an application that does the following thing :

  • Getting Commands via ArtNET (DMX over Ethernet, a Control Protocol) for each object (called Layer)
  • each Layer could be one of the following : Live Camera Stream, Movie, Image
  • each layer could be translated, rotated or stretched
  • on each layer I can set filters (Like a Kaleidoscope Effect, Blur, Color Correction, etc.)
  • the rsulting video-stream is in the 3d-space
  • I want to display each part of the image on one Projector (in total up to 3 ones) using a TripleHead2GO (3 Projectors display a different region of my DVI-Output). Each Projecector-Image should have own Soft-Edge and Keystone parameters.
  • the resulting image will also be shown on a Preview-Screen with some Information overlay.

  I think all that should be possible with opengl and openal (for the movie audio)

  I think I'll use C++, OpenGL for Graphics, OpenAL for Audio, if needed ffmpeg for Video conversion, Ubuntu/Debian as OS.

  The software is used to do Multimedia-Shows on Concerts including Cameras & Co.

  All that should happen Live (On a FullHD output), Having i7 3770, GLX 670 and 16GB of Ram for at least 8 Layers. (4 Live-Images at once + Some Overlays like the Actors Name and some Logos)

  But now comes the question.

  Is it also Posible to do the following with that setting :

  • Writing the output Image with all the 3d translations to a Movie File (To Master a DVD later) with Audio
  • Mixing Audio from different Inputs & Files (Ambience Mics, Signal from the Sound Mixer, Playbacks from my own application) to more than one Mix (eg. one Mix for the Recording, one Mix for Live)
  • Stream that Output Complete or in Parts (e.g. the left Part of the Image) over the Network (For example, Projector 1 is near the Server, so I connect it using DVI, Projector 2+3 is connected to a Computer that receives the streams for that two projectors (with soft edge on each stream) and Screen 4 is outside the Concert Hall and shows the complete Live-Stream.
  • What GUI-Framework should I use for that ?
  • is it perhaps event performant enough to use Java for that ?
  • is it posible to use that mechanism for just rendering (eg. I have stored the cut points on Disc and saved every single camera stream to change some errors later or cut out some parts)

• Merge commit ’7c55fac7dfa8bad9644dea5d03309da30be69563’

  14 novembre 2016, par Hendrik Leppkes

  Merge commit ’7c55fac7dfa8bad9644dea5d03309da30be69563’
  * commit ’7c55fac7dfa8bad9644dea5d03309da30be69563’ :
  
    fate : Add test for webp
  Noop, we already have a variety of webp tests, including a fate-webp target,
  
  which would collide with this test.
  Merged-by : Hendrik Leppkes <h.leppkes@gmail.com>