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• ffmpeg : combine portrait and landscape video files in one file by adding a black frame

  18 juillet 2021, par Oliver

  i use my iPhone to record videos. Usually i get a lot of short clips, which I upload to my pc and then concatenate them with ffmpeg using this command :

  


  ffmpeg -f concat -safe 0 -i filelist.txt -c:v libx265 -preset slow -x265-params strong-intra-smoothing=0:merange=58 -crf 25 -c:a aac -b:a 320k -tag:v hvc1 output.mp4


  


  filelist contains a list of these clips sorted by date. This works fine, but recently a had some clips recorded in portrait mode. The result was an output video which contained the portrait clips stretched to fill the full horizontal space. Instead of that i would like to just have the horizontal space filled with black borders. Is that possible by changing the command posted above ? Or do i have to convert those portrait clips before ?

  


• Video rotation with FFmpeg

  6 mars 2016, par haresh

  I’m developing a PHP web service for my iPhone app in order for the users to upload videos. When users want to see a video on the site they get a horizontal video, so I need rotate the video using FFmpeg commands. Can someone help me ?

  function make_rotation($input, $output, $transpose="1") {
  
      $ffmpegpath = "ffmpeg";
  
      if(!file_exists($input)) return false;  
  
      //$command = "$ffmpegpath -i $input -vf 'transpose=$transpose' $output";
  
      //$command = "ffmpeg -vfilters 'rotate=270' -i $input $output";
  
      $command ="ffmpeg -i $input -vf 'transpose=$transpose'  $output";
  
      exec($command);
  
      return true;
  
  }

  Thanks All

• When converting .mov to .flv video plays horizontally

  2 janvier 2014, par user291247

  When I record a video (.mov) through my iPhone it display vertically which is right.
  But after converting the .mov to .flv(using ffmpeg) it displays horizontally.

  My code :

  function convert_flv($vidtime,$infile, $outfile, $w = 0, $h = 0, $extra_infile = '', $extra_outfile = '') {
  
      $parms = '';
  
      if($w == 0 && $h == 0) {
  
          //$parms .= '-sameq ';
  
      } else {
  
          $parms = '-s {$w}x{$h} ';
  
      }
  
  
  
      if($vidtime==60) {
  
          $cmd = ffmpeg($infile, $outfile, $parms.' '.$extra_infile, '-t 00:01:00 -ar 22050 -r 15 -f flv  '.$extra_outfile);
  
      } else {
  
          $cmd = ffmpeg($infile, $outfile, $parms.' '.$extra_infile, '-t 00:04:00 -ar 22050 -r 15 -f flv  '.$extra_outfile);
  
      }
  
  
  
      print_r($cmd);
  
      return $cmd;
  
  }