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• WebM Decoding Improvements in Google Chrome 6

  10 septembre 2010, par noreply@blogger.com (John Luther)

  Google Chrome 6 for Windows, Mac and Linux was released last week. We want to congratulate the Chrome team and thank them for their contributions to the WebM project.

  Making the web faster is a core goal of Chrome, and we are happy to report that across a set of test clips Chrome 6 decodes VP8 video significantly faster than the developer version that was released at our launch in May. On single-core Intel machines the average improvement is about 20% ; on multicore processors it ranges from 15% (two cores) to 50% (four cores). If you want to try it for yourself, get Chrome 6 and then follow our instructions for playing WebM videos on Youtube.

  We’ve made further decoding speed gains in Chrome 7 dev channel, and are working on better video rendering to further improve the WebM user experience.

  

• Museum of Multimedia Software, Part 3

  18 août 2010, par Multimedia Mike — Software Museum

  Discreet Cleaner 5
  Capture, author, encode, and publish multimedia in Real, QuickTime, Windows Media, MP3, DV, and MPEG formats. This package has a copyright date of 2001 (thus predating Flash video by a few years). This software seems to have since been purchased by Autodesk and is up to version 6.5 (which does support Flash video).

  
  
  

  Discreet Plasma
  "Web 3D Design." Package is copyright 2002. Like the last package, this package also makes reference to Discreet being a division of Autodesk. Sure enough, Autodesk purchased them in 1999 and would later rename them Autodesk Media and Entertainment.

  
  
  

  Debabelizer
  "The Graphics Processing Toolbox." Looking down its list of features on the box copy, I honestly wonder if it can accomplish anything that ImageMagick can’t.

  
  
  

  MatchWare Mediator 7
  "Create Flash, HTML & CD-Rom Presentations." Wow, version 7, and with a latest copyright date of 2002 on the box. There’s still a top-Google-hit web page for MatchWare Mediator 9, this one instead emphasizing interactive CDs, HTML, and then Flash.

  
  
  

  Final Cut Pro v1.2.5
  Promotional copy Apple’s video editing software. No copyright date, but it requires a PowerPC G3 or G4 and Mac OS 9.

  
  
  

  Apple Keynote
  More Apple software that I think can technically be classified as multimedia-related. I’m not sure which version this is.

  
  
  

• bash avconv/ffmpeg to recursively batch convert videos to webm

  31 juillet 2014, par user234385

  I have accumulated many years of home movies on my computer. I am moving everything to the cloud, so file size and web compatibility is now desirable. After several months of toying with this problem, reading many postings on stackoverflow and documentation at ffmpeg and libav, I settled on the following bash command :

  find . -type f -name '*.m4v' -exec bash -c 'avconv -i "$0" -c:v libvpx -crf 30 -b:v 2M -c:a libvorbis "${0/%m4v/webm}"' '{}' \;

  My frames per second are sometimes good, and sometimes lousy, all relative to my hardware. Is there anything about the foregoing code that could changed to increase performance without sacrificing quality and file size ?