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• ffmpeg - skipping frames while watermarking

  12 août 2018, par Vaas

  I am building a video watermark utility based on ffmpeg.

  But watermarking takes considerable time. I wish to reduce the watermarking time by skipping frames while processsing.

  Is it possible to skip frames while processing video ?

  Like adding text to only every other frame ?

  ffmpeg  -i "D://sample.mp4"  -vf [in]drawtext=fontfile='C\://Windows//Fonts//Calibri.ttf':fontsize=27.9:text=www.example.com:fontcolor=#ffffff:box=1:boxcolor=0x00000099:x=w-tw-10:y=h-th-10 -y D:\watermarked.mp4

• PHP adding watermark to video

  28 août 2015, par Pilo Basualdo

  I´m needing to add a watermark on the top left corner of a video, the watermark is black text with a white box.

  I’m running the code on a console. This is the code I have by now. Never the less the code is returning the video without the watermark. Any idea what is wrong ? How could I’ find the height and width of the video ?

              $im = imagecreatetruecolor(640, 1136);
  
              imagesavealpha($im, true);
  
              $color = imagecolorallocatealpha($im, 0, 0, 0, 127);
  
              imagefill($im, 0, 0, $color);
  
              imagepng($im, $im);
  
              imagesavealpha($im, true); // important to keep the png's transparency 
  
              $text_color = imagecolorallocate($im, 0, 0, 0);
  
              $width = 640; // the width of the image
  
              $height = 1136; // the heighst of the image
  
              $font_size = 20; // font size
  
              $box_color = imagecolorallocate($im, 255, 255, 255);
  
              // Set the offset x and y for the text position
  
              $offset_x = 0;
  
              $offset_y = 20;
  
              $dims = imagettfbbox($font_size, 0, $font, $text);
  
              $text_width = $dims[4] - $dims[6] + $offset_x;
  
              $text_height = $dims[3] - $dims[5] + $offset_y;
  
              // Add text background
  
              imagefilledrectangle($im, 0, 0, $text_width, $text_height, $box_color);
  
              // Add text
  
              imagettftext($im, $font_size, 0, $offset_x, $offset_y, $text_color, $font,$text);
  
              imagepng($im, $img, 0);
  
              imagedestroy($im);
  
  
  
              exec("ffmpeg -v error -y  -i $path -i $im -filter_complex 'overlay' $path");                

• watermark commend for ff-mpeg batch converter

  6 septembre 2018, par D.JCode

  I used FFmpeg Batch Converter for video converting. I used the below command

  -c:v libx264 -crf 20 -c:a copy

  Now I want to add a watermark too.

  logo.png -filter_complex "overlay=50:50" -c:v libx264 -crf 20 -c:a copy

  but it does not work. Could you help me how can I write the above code to add water mark with having control on the watermark size.