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• PHP-FFMpeg Video Stabilization using VidStab

  19 février 2016, par BakerStreet

  I’m using PHP-FFMpeg in a Laravel 5.2 application to stabilize videos with the help of VidStab. I have all the dependencies and everything installed correctly and I can follow the directions on the VidStab repo to stabilize my videos via the command line.

  My question is how could I do this nicely (the Laravel way) from within PHP ? I know I can add a custom filter to the Video object like this :

  $video = $ffmpeg->open('shaky_video.mp4');
  
  $video->addFilter(new CustomFilter('vidstabdetect=stepsize=6:shakiness=8:accuracy=9:result=transform.trf'));

  But how can I execute this command without the need for $video-save(), which I think is designed to output a video/audio file and not the trf analysis file ?

  I suppose I could just run a PHP exec() command, but I would like to keep this as much object oriented PHP as I can. Any suggestions ?

  Thanks in advance !

  ---

  I’ve tried this (added -f null - to filter and then tried running save() to execute the command), but it still creates the mp4 file instead of the trf file :

  $video = $ffmpeg->open('shaky_video.mp4');
  
  $video->addFilter(new CustomFilter('vidstabdetect=stepsize=6:shakiness=8:accuracy=9:result=transform.trf -f null -'));
  
  $video->save(new X264(), 'stabilized.mp4');

• avfilter/vf_drawtext : improve glyph shaping and positioning

  26 mai 2023, par yethie

  avfilter/vf_drawtext : improve glyph shaping and positioning
   text is now shaped using libharfbuz
  
   glyphs position is now accurate to 1/4 pixel in both directions
  
   the default line height is now the one defined in the font
  Adds libharfbuzz dependency.
  

  • [DH] configure
  • [DH] doc/filters.texi
  • [DH] libavfilter/vf_drawtext.c

• Line 1 : unknown keyword ' file' ffmpeg

  6 janvier 2024, par pops64

  I am trying to run a concation of multiple files using ffmpeg. Followed directions in docs and getting

  


  Line 1: unknown keyword 'file'
[in#0 @ 000001b09b25e840] Error opening input: Invalid data found when processing input
Error opening input file mylist.txt.
Error opening input files: Invalid data found when processing input


  


  I am not sure what is going wrong. The text file appears to be in the correct format.

  


  $clips = Get-ChildItem -Path Y:\****\Test -File -Filter "*.mp4"
$regex = "(?:\w+)-(?:[i]+-)?(?\d+)-(?\d+)-(?:\w+)"
$groupedScenes = $clips | Group-Object {[regex]::Match($_.Name, $regex).Groups["scene_id"].value}
foreach($scene in $groupedScenes)
{
    $sortedScene = $scene.Group | Sort-Object {[regex]::Match($_.Name, $regex).Groups["clip_id"].value -as [int]} 
    foreach($i in $sortedScene) 
    {
        "file 'Y:\*****\Test\$i'" | Out-File mylist.txt -Encoding utf8 -Append
    }
    .\ffmpeg.exe -f concat -safe 0 -i mylist.txt -map 0 -c:v hevc_amf -quality quality -rc cqp -qp_p 26 -qp_i 26 -c:a aac -b:a 128K -y Y:\*****\Test\Procssed\$sortedScene.mp4
    Remove-Item mylist.txt
}