Sur d’autres sites (15321)

• Kick out GA tracking from demos. As nice as it would be to know how many people actually use the plugin, this is not the right approach.

  3 novembre 2011, par Jörn Zaefferer

  m demo/ajaxSubmit-intergration-demo.html m demo/custom-methods-demo.html m demo/dynamic-totals.html m demo/errorcontainer-demo.html m demo/index.html m demo/marketo/index.html m demo/milk/index.html m demo/radio-checkbox-select-demo.html m demo/tabs/index.html m demo/themerollered.html m (...)

• waveforms arent as smooth as they should be

  25 mars 2019, par GROVER.

  So I’ve been trying to create a little clone of SoundClouds ’peaks’ waveform. I have noticed that their waveforms are a lot more streamlined
  compared to my sudden shifts in ’loudness’. The dynamic range between peaks never seems to be too steep, and they always represent the perceived loudness of each part of the track pretty well.

  ---

  Here’s an example :

  

  Notice how all the ’drops’ are fairly distinguishable to the ’breakdowns’ in their waveform, but mine is all over the place (apart from the last drop and breakdown, which are kind of similar). There are some minor similarities, but the ’jaggedness’ is still very prominent even in those areas.

  I’m using wav2json as a peaks converter (which is run through the command line and programmed in C++). This is is an example of how I use it :

  /*
  
  *    --channels: mids and min
  
  *    --db-min (minimum level in dB to capture): -35dB
  
  *    --db-max (pretty self explanatory): 6dB
  
  *    -d: use logarithmic instead of linear scale
  
  *    -s (number of peaks to generate): 1800
  
  *    -o (output file): outputfile.json
  
  *    -p (precision of floats): 0
  
  *    -n: no header 
  
  */
  
  exec("wav2json inputfile.wav -s 1800 --channels mid min -d --db-min -35 --db-max 6 -p 0 -o outputfile.json -n");
  
  
  
  $fp     = fopen($tmpOutput, "r");
  
  $json   = fread($fp, filesize($tmpOutput));
  
  // get mids and min from the generated peaks file
  
  $mid    = json_decode($json, true)["mid"];
  
  $min    = json_decode($json, true)["min"];
  
  fclose($fp);
  
  unlink($tmpOutput);
  
  
  
  /* 
  
  *  from here I just combine each mid and min value together and divide by two
  
  *
  
  *  then I normalise all the peaks (instead of each value being between -0.293 to 
  
  *  1.766(just as an example), it is between 0 and 100)
  
  */

  What I’m trying to figure out - and have been trying to for the last few months - is how to get each peak more streamlined and to have the dynamic range of each one look how it actually sounds.

  ---

  What I have tried :

  • ffmpeg eqing
  • actually eqing the highs and lows in a daw and then comparing waveforms
  • using various parameters for wav2json (db min and max, linear etc.)
  • using various compressors and multiband compressors on the track

  All help is appreciated,
  Cheers.

• FFmpeg : How to change tempo dynamically

  25 octobre 2018, par Ankush

  I am working on an android project in which I need to change the tempo of an mp3 (50 seconds audio) file dynamically as shown :

        Time            |    Tempo
  
   ----------------------------------------------
  
        0-4             |     1.0    
  
                        |    
  
        4-8             | change form 1.0 to 0.5 
  
                        |
  
        8-12            |     0.5
  
                        |
  
        12-16           | change from 0.5 to 1
  
                        |
  
        16-20           |     1
  
                        |
  
        20-24           | change from 1 to 1.5
  
                        |
  
        24-28           |     1.5
  
                        |
  
        28-32           | change from 1.5 to 1
  
                        |
  
        32-36           |     1
  
                        |
  
        36-40           | change from 1 to 1.5
  
                        |
  
        40-44           |     1.5
  
                        |
  
        44-48           | change from 1.5 to 1
  
                        |
  
        48-50           |     1

  I had searched and found that I can use atempo for this. But it changes the whole audio tempo. I think that I can split the audio and apply the effect but it also not work for this type of dynamic task. Please help me to find the solution. Thank you in advance :)