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• ffmpeg fails to build by MacPorts

  11 mars 2015, par Rafa Firenze

  I’ve seen a many problems about this, but I didn’t get a solution.

  My OS is Yosemite and current OpenCV is 2.4.9

  I’m trying to install OpenCV with TBB, but when I do it by sudo port install opencv +debug +python27 +qt4 +tbb (through this SO question) :

  Rafaels-iMac:y3PQFyQhUG rafaelruizmunoz$ sudo port install opencv
  +debug +python27 +qt4 +tbb

  Warning : The Xcode Command Line Tools don’t appear to be installed ; most ports will likely fail to build.

  Warning : Install them by running ’xcode-select —install’.

  Warning : The Xcode Command Line Tools don’t appear to be installed ; most ports will likely fail to build.

  Warning : Install them by running xcode-select —install’.

  ---> Computing dependencies for ffmpeg

  ---> Configuring ffmpeg Error : Failed to configure ffmpeg, consult /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_multimedia_ffmpeg/ffmpeg/work/ffmpeg-2.6/config.log

  Error : org.macports.configure for port ffmpeg returned : configure failure : command execution failed Please see the log file for port ffmpeg for details :

  /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_multimedia_ffmpeg/ffmpeg/main.log

  Error : Unable to upgrade port : 1

  Error : Unable to execute port : upgrade ffmpeg failed

  And there are not any logs on those paths.

  I’ve tried (support from SO and MacPorts).

  • port selfupdate
  • port upgrade ffmpeg
  • port clean x264
  • port upgrade outdated
  • port -f selfupdate

  but nothing happened.

  Does anyone have a clue ?

  Thank you in advance.

  ---

  EDIT : Doing xcode-select --install doesn’t resolve anything.

• Merge Multiple Videos using node fluent ffmpeg

  8 juillet 2015, par shyamshyre

  requirement is to read all the files in the directory and merge them.
  I am using node fluent-ffmpeg to achieve this.
  First of all reading all the files in the directory appending concatenating the string by adding .input.

  var finalresult="E:/ETV/videos/finalresult.mp4"
  
  outputresult : It consists of all the files read in the directory.
  
  
  
  /*Javascript*/
  
  MergeVideo(outputresult);
  
  function MergeVideo(outputresult){
  
  console.log("in merge video");
  
  var videostring = "";
  
  
  
  for(i=1;i<5;i++)
  
      {
  
  videostring = videostring+".input("+"'"+outputresult[i]+"'"+")";
  
  }
  
  console.log("Video String"+videostring);
  
      var proc = ffmpeg()+videostring
  
      .on('end', function() {
  
        console.log('files have  succesfully Merged');
  
          })
  
      .on('error', function(err) {
  
        console.log('an error happened: ' + err.message);
  
      })
  
      .mergeToFile(finalresult);
  
  }

  It gives the following error :

  TypeError: Object .input('ETV 22-02-2015 1-02-25 AM.mp4').input('ETV 22-02-2015
  
  9-33-15 PM.mp4').input('ETV 22-02-2015 9-32-46 AM.mp4').input('ETV 22-02-2015 8-
  
  32-44 AM.mp4') has no method 'on'
  
      at MergeVideo (D:\Development\Node\node-fluent-ffmpeg-master\node-fluent-ffm
  
  peg-master\examples\demo.js:140:6)
  
      at Object.<anonymous> (D:\Development\Node\node-fluent-ffmpeg-master\node-fl
  
  uent-ffmpeg-master\examples\demo.js:129:1)
  
      at Module._compile (module.js:456:26)
  
  </anonymous>

  Any help is appreciated.

• Rails : MP4 videos showing up blank in Firefox (but works in Chrome)

  10 février 2015, par Mark Boulder

  I got this Rails app with uploaded MP4 videos that play back just fine in Chrome - but why do they show up blank in Firefox ?

  The video appears on the page and plays just fine if I download it :

  <video loop="loop" src="/path/to/whatever.mp4?1234567"></video>

  From Rails I did :

  <%= video_tag photo.attachment_url(:medium) %>

  I tried adding Mime::Type.register "video/mp4", :mp4 to config/initializers/mime_types.rb but to no avail.

  Live app : http://runnable.com/VNkNeJ9wpNZJBEma/paperclip-mp4-problem

  Click Run and navigate to the last post to see the MP4. Note that Runnable is very slow. If it says something bad happened in the terminal, try reloading the page until it disappears.

  • http://caniuse.com/#feat=video
  • Rails : MIME type issues with .m4v files
  • HTML5 video (mp4 and ogv) problems in Safari and Firefox - but Chrome is all good