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• Audio problems when resizing video - moviepy

  17 août 2020, par Jordan

  I am resizing an mp4 video with this code (moviepy) :

  


  video_clip = VideoFileClip(url)
resized = video_clip.resize(width=720)
d = tempfile.mkdtemp()
video_path = os.path.join(d, 'output.mp4')
resized.write_videofile(video_path)


  


  The resized clip's audio works when I play it on my pc, but not on an iPhone. (The original clip's audio does work on my iPhone.)

  


  How can I fix this ?

  


  First image : Codec of resized video
  
Second image : Codec of original video

  


  


  


• Video Spec to fluent-FFMPEG settings

  26 novembre 2020, par Dean Van Greunen

  Not sure how to translate this video spec into fluent-FFmpeg. please assist.

  


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  This is the only video I have that plays on my iPhone, and I would like to reuse the video's encoding to allow other videos I have, to be converted into the same video format. resulting in having my other videos playable via iPhone and iOS. (this also happens to play on android, I would like the recommended encoding settings to also work on android)

  


  


  


  The video should also be streamable, I know theres a flag called +faststart but not sure how to use it.

  


  


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  here is my existing code

  


  function convertWebmToMp4File(input, output) {
  return new Promise(
    function (resolve, reject) {
  ffmpeg(input)
    .outputOptions([
      // Which settings should I put here, each on their own line/entry <-- Important plz read
      '-c:v libx264',
      '-pix_fmt yuv420p',
      '-profile:v baseline',
      '-level 3.0',
      '-crf 22',
      '-preset veryslow',
      '-vf scale=1280:-2',
      '-c:a aac',
      '-strict experimental',
      '-movflags +faststart',
      '-threads 0',
    ])
    .on("end", function () {
      resolve(true);
    })
    .on("error", function (err) {
      reject(err);
    })
    .saveToFile(output);
  });
}


  


  ---

  


  TIA

  


• PHP exec is causing issues in my webservice

  11 novembre 2013, par meda

  Guys I need some help with this

  I am building an android app that uploads a sound file to a server then converts it.
  Then the next step in my app is to populate a spinner using JSON from another script

  Everything works as expected but for some reason I get an JSON parsing error on the next step.
  I made sure the JSON is correct, so the problem is not there.
  You can trust me on that, I debugged this.

  The android error is :

  E/JSON Parser(14625) : Error parsing data org.json.JSONException : Value
   !DOCTYPE of type java.lang.String cannot be converted to JSONObject

  It the JSON script is not even called, because I put some logs to make sure

  It seems like the issue is comming from the webservice instead, particularly the following function

  function ConvertFileToUlaw($input, $output) { 
  
      try {
  
          exec("ffmpeg -i \"$input\" -codec:a pcm_mulaw -f mulaw \"$output\"");
  
         //error_log($output);
  
      } 
  
      catch (Exception $e) {
  
          error_log($e->getMessage());
  
      }
  
  } 

  I call it like this :

  ConvertFileToUlaw($ThreeGpFilePath, $ulawFilePath);

  Now this works fine, and my sound file is converted, but I can get the next script to run without error, unless I comment it out.

  I am stumped at this point, please advice.