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• ffmpeg screen capture using screen-capture-recorder cmd not working in vb

  14 juin 2014, par user3234288

  I’ve started ffmpeg as process in VB but ffmpeg cmd for capturing alone is not working. My code is,I don’t know how to solve the problem, if any help greatly appreciated

  proc.StartInfo.FileName = System.Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) & "\converter\bin\ffmpeg.exe"            
  
  proc.StartInfo.Arguments = "-f dshow -i video=screen-capture-recorder screen.mp4"
  
  proc.StartInfo.UseShellExecute = False
  
  proc.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
  
  proc.StartInfo.RedirectStandardInput = True
  
  proc.StartInfo.RedirectStandardOutput = True
  
  proc.StartInfo.CreateNoWindow = True
  
  proc.Start()

• My crazy linux.conf.au week

  9 février 2012, par silvia

  In January I attended the annual Australian Linux and Open Source conference (LCA). But since I was sick all of January and had a lot to catch up on, I never got around to sharing all the talks that I gave during that time.

  Drupal Down Under

  It started with a talk at Drupal Down Under, which happened the weekend before LCA. I gave a talk titled “HTML5 video specifications” (video, slides).

  I spoke about the video and audio element in HTML5, how to provide fallback content, how to encode content, how to control them from JavaScript, and briefly about Drupal video modules, though the next presentation provided much more insight into those. I explained how to make the HTML5 media elements accessible, including accessible controls, captions, audio descriptions, and the new WebVTT file format. I ran out of time to introduce the last section of my slides which are on WebRTC.

  Linux.conf.au

  On the first day of LCA I gave a talk both in the Multimedia Miniconf and the Browser Miniconf.

  Browser Miniconf

  In the Browser Miniconf I talked about “Web Standardisation – how browser vendors collaborate, or not” (slides). Maybe the most interesting part about this was that I tried out a new slide “deck” tool called impress.js. I’m not yet sure if I like it but it worked well for this talk, in which I explained how the HTML5 spec is authored and who has input.

  I also sat on a panel of browser developers in the Browser Miniconf (more as a standards than as a browser developer, but that’s close enough). We were asked about all kinds of latest developments in HTML5, CSS3, and media standards in the browser.

  Multimedia Miniconf

  In the Multimedia Miniconf I gave a “HTML5 media accessibility update” (slides). I talked about the accessibility problems of Flash, how native HTML5 video players will be better, about accessible video controls, captions, navigation chapters, audio descriptions, and WebVTT. I also provided a demo of how to synchronize multiple video elements using a polyfill for the multitrack API.

  I also provided an update on HTTP adaptive streaming APIs as a lightning talk in the Multimedia Miniconf. I used an extract of the Drupal conference slides for it.

  Main conference

  Finally, and most importantly, Alice Boxhall and myself gave a talk in the main linux.conf.au titled “Developing Accessible Web Apps – how hard can it be ?” (video, slides). I spoke about a process that you can follow to make your Web applications accessible. I’m writing a separate blog post to explain this in more detail. In her part, Alice dug below the surface of browsers to explain how the accessibility markup that Web developers provide is transformed into data structures that are handed to accessibility technologies.

• StdioURLProtocolHandlerTest failed while Xuggler build under Windows

  26 mars 2012, par Dims

  Trying to build Xuggler under Windows. My Windows is x64 Win 7 prof, but all used libraries are 32bit. I am running build procedure under MinGW/MSys, from under Msys shell with the followinf script :

  #!/bin/sh
  
  export JAVA_HOME=/C/Program\ Files\ \(x86\)/Java/jdk1.6.0_25
  
  export XUGGLE_HOME=/C/Xuggler
  
  
  
  PATH=$XUGGLE_HOME/bin:/C/Program\ Files\ \(x86\)/Java/jdk1.6.0_25/bin:/d/APPS/msysgit/msysgit/bin/git:/D/APPS/MinGW/bin:/bin:/D/APPS/apa    che-ant-1.8.2/bin:/D/Users/Dims/Design/MinGW/Util:$PATH
  
  ant -Dbuild.m64=no run-tests

  The error follows

   [exec] Running 6 tests..
  
   [exec] In StdioURLProtocolHandlerTest::testRead:
  
   [exec] ../../../../../../../../../test/csrc/com/xuggle/xuggler/io/StdioURLProtocolHandlerTest.cpp:108: Error: Expected (4546420 == totalBytes), found (4546420 != 1042)
  
   [exec] In StdioURLProtocolHandlerTest::testReadWrite:
  
   [exec] ../../../../../../../../../test/csrc/com/xuggle/xuggler/io/StdioURLProtocolHandlerTest.cpp:185: Error: Expected (4546420 == totalBytes), found (4546420 != 1042)
  
   [exec] In StdioURLProtocolHandlerTest::testSeek:
  
   [exec] ../../../../../../../../../test/csrc/com/xuggle/xuggler/io/StdioURLProtocolHandlerTest.cpp:139: Error: Expected (4546420 == totalBytes), found (4546420 != 1042)
  
   [exec] .
  
   [exec] Failed 3 of 6 tests
  
   [exec] Success rate: 50%
  
   [exec] FAIL: xugglerioTestStdioURLProtocolHandler.exe

  My questions is : did anybody did this on Windows and did he/she have this test passed ? :)

  UPDATE 1

  The test code is follows :

  int32_t totalBytes = 0;
  
  do {
  
      unsigned char buf[2048];
  
      retval = handler->url_read(buf, (int)sizeof(buf));
  
      if (retval > 0)
  
           totalBytes+= retval;
  
  } while (retval > 0);
  
  VS_TUT_ENSURE_EQUALS("", 4546420, totalBytes);

  While the url_read code is follows :

  int
  
  StdioURLProtocolHandler :: url_read(unsigned char* buf, int size)
  
  {
  
      if (!mFile)
  
          return -1;
  
      return (int) fread(buf, 1, size, mFile);
  
  }

  I don't understand, under what circumstances it can return 1042 ??? May be 64 bits play here somehow ?

  UPDATE 2

  I printed out filename used and it was

  d:/......./../../../test/fixtures/testfile.flv

  the path is correct, but started with d:/ not with /d/

  Can this play a role under Msys ?