PHP method to intercept specified frames of video into images

This article mainly introduces the relevant information of php to intercept the specified frame of the video into a picture. Friends who need it can refer to

Intercepting the specified frame of the video into a picture. The php ffmpeg extension has been perfectly implemented:

$movie = new ffmpeg_movie($video_filePath);
$ff_frame = $movie->getFrame(1);
$gd_image = $ff_frame->toGDImage();
$img="./test.jpg";
imagejpeg($gd_image, $img);
imagedestroy($gd_image);

However, the problem comes. Due to different shooting directions, the video will be rotated and carry meta information rotate. When you intercept the frame picture relative to the video, if there is a video with rotate information , the frame is also rotated, so you need to rotate the captured image accordingly.

Then the php ffmpeg extension cannot obtain the rotation information (php ffmpeg extension document), but it can be obtained through the ffmpeg command line:

/usr/local/ffmpeg/bin/ffprobe test .mp4 -show_streams | grep rotateUse php to simply encapsulate it as follows:

function get_video_orientation($video_path) {
  $cmd = "/usr/local/ffmpeg/bin/ffprobe " . $video_path . " -show_streams 2>/dev/null";
  $result = shell_exec($cmd);
 
  $orientation = 0;
  if(strpos($result, 'TAG:rotate') !== FALSE) {
    $result = explode("\n", $result);
    foreach($result as $line) {
      if(strpos($line, 'TAG:rotate') !== FALSE) {
        $stream_info = explode("=", $line);
        $orientation = $stream_info[1];
      }
    }
  }
  return $orientation;
}

Use the imagerotate() function to rotate the screenshot:

$movie = new ffmpeg_movie($video_filePath);
$frame = $movie->getFrame(1);
$gd = $frame->toGDImage();
if ($orientation = $this->get_video_orientation($video_filePath)) {
  $gd = imagerotate($gd, 360-$orientation, 0);
}
$img="./test.jpg";
imagejpeg($gd, $img);
imagedestroy($gd_image);

Finally there is one trouble, not all Both players and browsers can recognize the orientation of the video and automatically rotate it. If you want to rotate the video, you can use the ffmpeg command:

/usr/local/ffmpeg/bin /ffmpeg -i input.mp4 -vf 'transpose=3' -metadata:s:v:0 rotate=0

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