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• lavu/opt : extend AVOptionRange by extra values

  30 mars 2014, par Lukasz Marek

  lavu/opt : extend AVOptionRange by extra values
  AVOptionRange is not flexible enough to store AV_OPT_TYPE_IMAGE_SIZE
  
  ranges. Current implementation can only store pixel count.
  
  This patch aims to keep backward compatibility and extend
  
  AVOptionRange with possibility to store width/height ranges.
  Signed-off-by : Lukasz Marek <lukasz.m.luki@gmail.com>
  

  • [DH] doc/APIchanges
  • [DH] libavutil/opt.c
  • [DH] libavutil/opt.h
  • [DH] libavutil/version.h

• ffmpeg on mac to get thumbnail using php

  5 janvier 2017, par freelixa

  i download the ffmpeg for mac and store it into the web folder.

  and in the upload.php i store this line of code. the upload part is successfull but the it failed to create a thumbnail from the video that i upload. please help

  if(isset($_POST['submit'])){
  
      $ffmpeg = "ffmpeg/ffmpeg";
  
      $name = $_FILES['file']['name'];
  
      $temp = $_FILES['file']['tmp_name'];
  
      $imagefile = "1.jpg";
  
      $size = "120x90";
  
      $getfromsecond = 5;
  
      $cmd = "$ffmpeg -i $temp -an -ss $getfromsecond -s $size $imagefile";
  
      if(shell_exec($cmd)){
  
          echo "thumbnail created";
  
      }else{
  
          echo "error in making thumbnail";
  
      }
  
      // hide .mp4 from video title in mysql, but extension still attached in file 
  
      //$name = preg_replace("/\b.mp4\b/i","",$name);
  
      //$name = preg_replace("/\b.flv\b/i","",$name);
  
      // moving the files from temporary name to the actual database and change the name to the actual name
  
      move_uploaded_file($temp,"video/".$name);
  
      $url = "video/$name";
  
      $query = "INSERT INTO `videolist` (`videoname`,`videourl`) VALUES ('$name','$url')";
  
      mysqli_query($connection,$query);
  
  
  
      echo "<br /> Congratulations ".$name." has been uploaded";
  
  }

• FFmpeg- waveform from audio with transparent background

  7 décembre 2020, par Lluis Semper

  If I use this command

  


  ffmpeg -y -i <mp3> -filter_complex "[0:a]aformat=channel_layouts=mono,showwavespic=s=375x244:colors=#ffffff" -vframes 1 test.png 2>&amp;1&#xA;</mp3>

  


  I get the output that I wanted. My only problem is that I do not want to store to disk and want to get a buffer to store as an image in S3.

  


  To do that I use this command :

  


  ffmpeg -y -i <mp3> -filter_complex "[0:a]aformat=channel_layouts=mono,showwavespic=s=375x244:colors=#ffffff" -vframes 1 -f mjpeg -&#xA;</mp3>

  


  In which a get a buffer of the waveform on

  


  runner.stdout.on("data", (data) => console.log(data));


  


  The only problem is that from that image the Background is black.

  


  My question is, how can achieve a transparent waveform without saving it to disk ?

  


  I do not want to use any library.