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• FFMPEG PHP - Converting gif to mpeg

  15 août 2014, par Kyle Goodrich

  I’d like to create a simple script that converts gifs to mpegs using FFMPEG PHP. The script works when using FFMPEG in terminal. When I use a similar script using FFMEG PHP and host it on my domain, the script converts the gif to an mpeg, but only converts one frame of it. This is strange because the FFMPEG line of code that is responsible for the conversion is essentially the same line used previously in terminal. I’ve made sure that my web host (cirtex) has FFMPEG installed in their server. Also, I made sure to edit my php.ini file for FFMPEG use.

  The script I created consists of two parts - uploader.php and uploader_02.php.

  uploader.php is a simple submit form, where the user uploads and submits a gif.

  uploader_02.php receives the gif and copies it over to another directory on the server. Then, the script applies the FFMPEG conversion to the saved gif.

  Here’s are the lines of php that are responsible for the conversion :

  <?php
  
  // ffmpeg
  
  $ffmpeg = "/usr/bin/ffmpeg";
  
  $videoFile = "test_videos/" . $name;
  
  $output = "test_videos/instagram.mpg";
  
  $cmd = "$ffmpeg -i $videoFile -vb 5M -y $output";
  
  exec($cmd);   
  
  ?>

  For some reason, only one frame of the gif is converted into mpeg format. Not sure what is causing this problem.

  Any information regarding this issue will help out a lot.

• ffmpeg yield different results when used in the application

  5 mai 2020, par xoail

  This is perplexing me. I am using ffmpeg to convert m4a to wav audio. When I use it with fluent-ffmpeg the output mime is audio/wave while when I do it using terminal I get audio/wav. For extactly same commands. The application I am trying to play these files is rejecting my audio/wave file.

  



  Using node (results in audio/wave) :

  



  const ffmpegPath = require('@ffmpeg-installer/ffmpeg')
const ffmpeg = require('fluent-ffmpeg');
ffmpeg()
.setFfmpegPath(ffmpegPath)
.input('source.m4a')
.outputOptions(['-ac 1','-ar 16000'])
.save('out.wav')


  



  Using terminal (results in audio/wav) :

  



  /same/path/to/static-ffmpeg-as-in-node-program/ffmpeg -i source.m4a -ac 1 -ar 16000 out.wav


  



  I've both of their encoding as, PCM S16 LE (s16l), 16 bits/sample, mono and 16khz samplerate audio files. I've tried adding other flags and got same results on both scenarios : -vn -acodec pcm_s16le -ar 16000 -ac 1 -f wav. Just that one doesnt work. And I have no idea why.

  



  I've also tried not using fluent-ffmpeg but using spawn and got same audio/wave file.

  



  Any insight ?

  


• ffmpeg lib/API to cut videos in java

  23 janvier 2017, par João Paulo Radd

  I’m trying to use some FFmpeg’s lib/API to java to cut a video in several parts by time. I know that I can use RunTime with a command to this, but in my case I need use this in code using some API/lib.
  Example command in terminal / runtime :

  ffmpeg -i /tmp/test.mp4 -ss 30 -c copy -to 40 /tmp/outTest.mp4

  ---

  String url_str = "ffmpeg -i /tmp/"+fileName+".mp4 -ss "+secStart+" -c copy -to "+secEnd+" /tmp/"+outfile+".mp4 -y";
  
      System.out.println("url_str :"+url_str);
  
          try {
  
              Runtime rt = Runtime.getRuntime();
  
              Process p = rt.exec(url_str);
  
              BufferedReader r = new BufferedReader(new InputStreamReader(p.getErrorStream()));
  
              String s;
  
              while ((s = r.readLine()) != null) {
  
                  //System.out.println(s); terminal response
  
              }
  
              r.close();

  Thus, I’ve a original video and a inicial time in seconds and a final time (some cases, optional) and create a new video with this part.
  I’m trying to use the FFmpeg Java by Andrew Brampton (net.bramp.ffmpeg) to do the same thing as the example. But, if some one know by other API/lib, like FFMPEG-Java (net.sf.ffmpeg_java) for example, will be good too.