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• Dynamic way to add length to an html5 video

  6 septembre 2013, par Eric Paulsen

  I'm looking for a way to update the video length on an HTML5 video in the client side using Javascript.

  Example : I have a video clip loaded on the page that is 30 seconds long and I want to update it on the fly to be 45 seconds long.

  I had a look at the duration property of the HTMLMediaElement, but quickly discovered that the property was read only (source : https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement). I also stumbled upon this blog post, but my ideal solution would be to have one continuous clip. I could accomplish this on the server side using a tool like FFMPEG, but I'd rather not add an increase in load time for our users.

  Any suggestions ?

• lavc : add teletext decoder using libzvbi

  1er septembre 2013, par Marton Balint

  lavc : add teletext decoder using libzvbi
  Based on a patch by Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>.
  
  http://lists.ffmpeg.org/pipermail/ffmpeg-devel/2012-December/136677.html
  The original patch was rebased by Tudor SUCIU <tudor.suciu@gmail.com>.
  Lots of additional features and fixes are made by me.
  Fixes ticket #2086.
  Changes since last version :
  
   change default page to all pages
  Signed-off-by : Marton Balint <cus@passwd.hu>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] Changelog
  • [DH] configure
  • [DH] doc/decoders.texi
  • [DH] doc/general.texi
  • [DH] libavcodec/Makefile
  • [DH] libavcodec/allcodecs.c
  • [DH] libavcodec/libzvbi-teletextdec.c
  • [DH] libavcodec/version.h

• How to use FFMPEG commands

  26 septembre 2013, par Shashank Agarwal

  In android i am making an app in which it will record an video and crop the video from center for doing so i found FFMPEG over google. I followed http://dmitrydzz-hobby.blogspot.in/2012/04/how-to-build-ffmpeg-and-use-it-in.html

  It works fine but i want to know how to use this `ffmpeg -y -i /sdcard/videokit/short.mp4 -vf crop=100:100:0:0 -s 320x240 -r 15 -aspect 3:4 -ab 12288 -vcodec mpeg4 -b 2097152 -sample_fmt s16 /sdcard/videokit/out.mp4

  ` video cropping command and Where to write this command.

  I have tried this (for concatenation just to check about how to use ffmpeg command )

  public class MainActivity extends Activity {
  
  private static native int logFileInfo(String[] args);
  
  String pathOut = "/storage/sdcard/12.mp3";
  
  String pathInM = "/storage/sdcard/23.mp3";
  
  String pathIn = "/storage/sdcard/out.mp3";
  
  @Override
  
  public void onCreate(Bundle savedInstanceState) {
  
      super.onCreate(savedInstanceState);
  
      setContentView(R.layout.activity_main);
  
      String[] args = {"ffmpeg",  "-i", "concat:", pathOut, "|",pathInM ,pathIn};
  
      logFileInfo(args);
  
      //logFileInfo("/storage/sdcard/12.mp3");
  
  }
  
  
  
  static
  
  {
  
      System.loadLibrary("mylib");
  
  }

  But i dont know what to write in mylib.c to execute this.somebody Please help