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• lavfi/loudnorm : add an internal libebur128 library

  15 octobre 2016, par Marton Balint

  lavfi/loudnorm : add an internal libebur128 library
  Also contains the following changes to the library :
  
   add ff_ prefix to functions
  
   remove cplusplus defines.
  
   add FF_ prefix to contants and some structs
  
   remove true peak calculation feature, since it uses its own resampler, and
  
    af_loudnorm does not need it.
  
   remove version info and some fprintf(stderr) functions
  
   convert to use av_malloc
  
   always use histogram mode for LRA calculation, otherwise LRA data is slowly
  
    consuming memory making af_loudnorm unfit for 24/7 operation. It also uses a
  
    BSD style linked list implementation which is probably not available on all
  
    platforms. So let’s just remove the classic mode which not uses histogram.
  
   add ff_thread_once for calculating static histogram tables
  
   convert some functions to void which cannot fail
  
   remove intrinsics and some unused headers
  
   add support for planar audio
  
   remove channel / sample rate changer function, in ffmpeg usually we simply
  
    alloc a new context
  
   convert some static variables to defines
  
   declare static histogram variables as aligned
  
   convert some initalizations to mallocz
  
   add window size parameter to init function and remove window size setter
  
    function
  
   convert return codes to AVERROR
  
   fix indentation
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] Changelog
  • [DH] configure
  • [DH] doc/filters.texi
  • [DH] libavfilter/Makefile
  • [DH] libavfilter/af_loudnorm.c
  • [DH] libavfilter/ebur128.c
  • [DH] libavfilter/ebur128.h
  • [DH] libavfilter/version.h

• 'ffmpeg' is not recognized as an internal or external command in nodejs node-ffmpeg

  24 mars 2024, par Wai Yan Hein

  I am developing a Node.js application. First of all, I am just a beginner when it comes to Node.

  


  What I am doing in my application now is that I am trying to create the thumbnail JPEG file for my mp4 file. I have already tried many possible solutions. Now I am using this one - https://github.com/damianociarla/node-ffmpeg. I think this is the potential solution among all. I am getting the error when I generate the JPEG thumbnail of the video file.

  


  Here is what I have done so far. I installed the package running this command

  


  npm install ffmpeg --save


  


  Then I try to generate the thumbnail files like this

  


  var ffmpeg = require('ffmpeg');
module.exports.createVideoThumbnail = function(req, res)
{
    try {
        var process = new ffmpeg('public/lalaland.mp4');
        process.then(function (video) {
            
            video.fnExtractFrameToJPG('public', {
                frame_rate : 1,
                number : 5,
                file_name : 'my_frame_%t_%s'
            }, function (error, files) {
                if (!error)
                    console.log('Frames: ' + files);
                else
                    //This error message is displayed
                    console.log(error)
            });

        }, function (err) {
            console.log('Error: ' + err);
        });
    } catch (e) {
        console.log(e.code);
        console.log(e.msg);
    }
    res.json({ status : true , message: "Video thumbnail created. Hopefully" });
}


  


  When I run the code, it is throwing an error. I commented in the code where the error is thrown from.
This is the error message

  


  { Error: Command failed: ffmpeg -i public/lalaland.mp4 -r 1 -s 0x0 -aspect NaN:NaN -vframes 5 -filter_complex "scale=iw*sar:ih, pad=max(iw\,ih*(NaN/NaN)):ow/(NaN/NaN):(ow-iw)/2:(oh-ih)/2:black" public/my_frame_1518211962631_0x0_%d.jpg
'ffmpeg' is not recognized as an internal or external command,
operable program or batch file.

    at ChildProcess.exithandler (child_process.js:275:12)
    at emitTwo (events.js:126:13)
    at ChildProcess.emit (events.js:214:7)
    at maybeClose (internal/child_process.js:925:16)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)
  killed: false,
  code: 1,
  signal: null,
  cmd: 'ffmpeg -i public/lalaland.mp4 -r 1 -s 0x0 -aspect NaN:NaN -vframes 5 -filter_complex "scale=iw*sar:ih, pad=max(iw\\,ih*(NaN/NaN)):ow/(NaN/NaN):(ow-iw)/2:(oh-ih)/2:black" public/my_frame_1518211962631_0x0_%d.jpg' }


  


  I installed the ffmg as well. You can see below it is an installed command on my laptop

  


  

  


  What is missing in my code ?

  


• Flash 9, non-NetStream/movieStar can detect when playback fails due to missing sound hardware support (or 32-channel sound ceiling being hit.) Implemented as SMSound.onplayerror() callback.

  1er mai 2012, par Scott Schiller

  m script/soundmanager2-jsmin.js m script/soundmanager2-nodebug-jsmin.js m script/soundmanager2-nodebug.js m script/soundmanager2.js m src/SoundManager2.as m src/SoundManager2_AS3.as m src/SoundManager2_SMSound_AS3.as m swf/soundmanager2.swf m swf/soundmanager2_debug.swf m (...)