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• Failed to convert web-saved .wemb audio to .wav by using php "shell_exec" and javascript

  30 mai 2022, par Anirbasgnaw

  I'm working on an online experimenter which could record participants' audio from the browser. The audio data I get has an extension of .wemb, so I plan to use ffmpeg to convert it to .wav while I save the data.

  


  I tried to use PHP's shell_exec but nothing happens when I run the scripts. Then I found that my echo and print_r also did not work. I'm new to PHP and javascript, so I''m really confused now.

  


  Below are the relevant codes, I really appreciate it if you could help !

  


  write_data.php :

  


  <?php
  $post_data = json_decode(file_get_contents('php://input'), true); 
  // the directory "data" must be writable by the server
  $name = "../".$post_data['filename'];
  $data = $post_data['filedata'];
   // write the file to disk
  file_put_contents($name, $data);
  
  $INPUT = trim($name) . ".webm";
  $OUTPUT = trim($name) . ".wav";
  echo "start converting...";

  // check if ffmprg is available
  $ffmpeg = trim(shell_exec('which ffmpeg'));
  print_r($ffmpeg);
  // call ffmpeg
  shell_exec("ffmpeg -i '$INPUT' -ac 1 -f wav '$OUTPUT' 2>&1 ");
?>


  


  javascript :

  


    saveData: function(fileName,format){
    // save  as json by default
    if (!format){ format = 'json';}
    // add extension to filename
    fileName = `${fileName}.${format}`
    // create saveData object using fetch
    let saveData = [];
    if (format == 'json') {
        saveData = {
          type: 'call-function',
          async: true,
          func: async function(done) {
            let data = jsPsych.data.get().json();
            const response = await fetch("../write_data.php", {
              method: "POST",
              headers: {
                "content-type": "application/json"
              },
              body: JSON.stringify({ filename: fileName, filedata: data })
            });
            if (response.ok) {
              const responseBody = await response.text();
              done(responseBody);
            }
          }
        }
    } else {
        saveData = {
          type: 'call-function',
          async: true,
          func: async function(done) {
            let data = jsPsych.data.get().csv();
            const response = await fetch("../write_data.php", {
              method: "POST",
              headers: {
                "content-type": "application/json"
              },
              body: JSON.stringify({ filename: fileName, filedata: data })
            });
            if (response.ok) {
              const responseBody = await response.text();
              done(responseBody);
            }
          }
        }
    }
    return saveData;
  },


  


• While converting MP4 to MP3, I am getting "Moviepy - Command returned an error" ?

  15 juin 2022, par raj sharma

  Moviepy - Command returned an error Internal Server Error : /api/aws/transcribe Traceback (most recent call last) : File "/home/web_admin_WT/video_transcript/env/lib/python3.6/site-packages/django/core/handlers/exception.py", line 47, in inner response = get_response(request) File "/home/web_admin_WT/video_transcript/env/lib/python3.6/site-packages/django/core/handlers/base.py", line 181, in _get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File "/home/web_admin_WT/video_transcript/env/lib/python3.6/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view return view_func(*args, **kwargs) File "/home/web_admin_WT/video_transcript/env/lib/python3.6/site-packages/django/views/generic/base.py", line 70, in view return self.dispatch(request, *args, **kwargs) File "/home/web_admin_WT/video_transcript/env/lib/python3.6/site-packages/rest_framework/views.py", line 509, in dispatch response = self.handle_exception(exc) File "/home/web_admin_WT/video_transcript/env/lib/python3.6/site-packages/rest_framework/views.py", line 469, in handle_exception self.raise_uncaught_exception(exc) File "/home/web_admin_WT/video_transcript/env/lib/python3.6/site-packages/rest_framework/views.py", line 480, in raise_uncaught_exception raise exc File "/home/web_admin_WT/video_transcript/env/lib/python3.6/site-packages/rest_framework/views.py", line 506, in dispatch response = handler(request, *args, **kwargs) File "/home/web_admin_WT/video_transcript/wtvideo_transcript/aws_transcript/views.py", line 13, in post transcribe_id, success_status = aws_transcribe(urls) File "/home/web_admin_WT/video_transcript/wtvideo_transcript/aws_transcript/helper.py", line 26, in aws_transcribe s3_url = upload_file_s3(url) File "/home/web_admin_WT/video_transcript/wtvideo_transcript/aws_transcript/helper.py", line 133, in upload_file_s3 moviepy.video.io.ffmpeg_tools.ffmpeg_extract_audio(url, download_path) File "/home/web_admin_WT/video_transcript/env/lib/python3.6/site-packages/moviepy/video/io/ffmpeg_tools.py", line 59, in ffmpeg_extract_audio subprocess_call(cmd) File "/home/web_admin_WT/video_transcript/env/lib/python3.6/site-packages/moviepy/tools.py", line 56, in subprocess_call raise IOError(err.decode('utf8')) OSError : ffmpeg version 4.2.2-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2019 the FFmpeg developers built with gcc 8 (Debian 8.3.0-6) configuration : —enable-gpl —enable-version3 —enable-static —disable-debug —disable-ffplay —disable-indev=sndio —disable-outdev=sndio —cc=gcc —enable-fontconfig —enable-frei0r —enable-gnutls —enable-gmp —enable-libgme —enable-gray —enable-libaom —enable-libfribidi —enable-libass —enable-libvmaf —enable-libfreetype —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-librubberband —enable-libsoxr —enable-libspeex —enable-libsrt —enable-libvorbis —enable-libopus —enable-libtheora —enable-libvidstab —enable-libvo-amrwbenc —enable-libvpx —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxml2 —enable-libdav1d —enable-libxvid —enable-libzvbi —enable-libzimg libavutil 56. 31.100 / 56. 31.100 libavcodec 58. 54.100 / 58. 54.100 libavformat 58. 29.100 / 58. 29.100 libavdevice 58. 8.100 / 58. 8.100 libavfilter 7. 57.100 / 7. 57.100 libswscale 5. 5.100 / 5. 5.100 libswresample 3. 5.100 / 3. 5.100 libpostproc 55. 5.100 / 55. 5.100 h : No such file or directory

  


  I getting this error when i am trying to convert MP4 to MP3 using Moviepy library of python. Can someone please tell me how can i solve it

  


• FFmpeg "Could not open file" error message when processing with PHP

  22 juin 2022, par FlyingCat

  I am using ffmpeg to get the image from several video files. I got my ffmpeg codes ready but I got the following error when I exec my codes.

  



  ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
built on Apr  2 2013 17:02:36 with gcc 4.6.3

*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
//files info...
//files info...
Incompatible pixel format 'yuv420p' for codec 'mjpeg', auto-selecting format 'yuvj420p'
//file info...
[buffer @ 0x1513c40] Buffering several frames is not supported. Please consume all available frames before adding a new one.
 Last message repeated 75 times
[image2 @ 0x1513460] Could not open file : /test/project
av_interleaved_write_frame(): Input/output error


  



  I only show the error messages that have color highlighted. 
My code :

  



   $ffmpeg ="/usr/bin/ffmpeg";

 $image_source_path = '/test/project/test.mp4';
 $ALL_PLACE_WIDTH = 300;
 $ALL_PLACE_HEIGHT = 300;

 $image_cmd = " -r 1 -ss 00:00:10 -t 00:00:01 -s ".$ALL_PLACE_WIDTH."x".$ALL_PLACE_HEIGHT."   -f image2 " ;

 $dest_image_path = '/test/project';

 $str_command= $ffmpeg  ." -i " . $image_source_path . $image_cmd .$dest_image_path;
 shell_exec($str_command);


  



  It seems my Linux wants to me to switch to avconv. I am not sure how to fix these errors. Can someone give me a hint about it ?