Recherche avancée

Sur d’autres sites (6547)

• ffmpeg in PHP : Resizing image works, but getting a 404 when trying to load resized image ?

  13 décembre 2016, par Eric David Sartor

  PHP :

  if ($output = shell_exec("ffmpeg -i localhost/video/tools/poster.png -vf scale=32:32 localhost/video/tools/poster_small.png 2>&1") !== NULL)
  
      echo $output;
  
  
  
  echo "Original:<br /><img src="http://stackoverflow.com/feeds/tag/poster.png" style='max-width: 300px; max-height: 300px' /><br /><br />Resize:<br /><img src="http://stackoverflow.com/feeds/tag/poster_small.png" style='max-width: 300px; max-height: 300px' />";

  So I’m trying to have an image upload form that creates a smaller version of the uploaded image after the upload is verified. All that works fine, and when I run this command with ffmpeg, the $output is 1. That obviously means that it isn’t returning NULL, which means ffmpeg is functioning in theory...but here’s the weird part...

  I’m echoing the images out into the HTML to visually verify if they worked, and what I get (for the resized image) is a 32x32 image container, but the image doesn’t load (404 in the dev console), which to me makes no sense. If the image container is 32x32, that means that the resize must’ve worked because that’s the size I told it to be in the ffmpeg command, but if the page isn’t loading the image, how did it even get the information that the image needed to be 32x32 ? I didn’t set that in the HTML/CSS anywhere...what’s going on here ?

  I’m running this on Windows in a XAMPP server. I’ve installed ffmpeg and verified it is working in the Windows command prompt. All the files are in localhost/video/tools/, other than the ffmpeg files of course, which are in localhost/ffmpeg/.

  A screenshot of the HTML output : http://ericsartor.ca/Capture.PNG

• ffmpeg produces video of 0 seconds on adding text

  7 mars 2018, par Anuj TBE

  I’m using ffmpeg to add text over video.

  ffmpeg -i /path_to_video_input/1520425717.mp4 -vf\
  
   "drawtext=text='This is text':x=10:y=H-th-10:fontsize=42:fontcolor=#FFFFFF"\
  
   /path_to_video_input/1520425717.mp4 -y

  Text is added to the video but video length is reduced to 0 seconds and shows only one frame.

  How to keep the length of video as original and add the text throughout the video ?

• FFMPEG not moving text

  27 janvier 2023, par sullyh7

  So I'm trying to add scrolling text to a video using ffmpeg (using Golang to execute a ffmpeg command)

  


  I am using this command to test how text moves :

  


  "ffmpeg -y -i %s -filter_complex \"[0]split[txt][orig];[txt]drawtext=fontfile=font/Amejo.ttf:fontsize=20:fontcolor=white:x=(w-text_w)/2+20:y=t:text='" + strings.Join(strings.Split(verse.Translation, " "), "\n") + "':bordercolor=black:line_spacing=20:borderw=3[txt];[orig]crop=iw:50:0:0[orig];[txt][orig]overlay\" -c:v libx264 -y -preset ultrafast %s"


  


  I have set the y = t, expecting it to move the text. However my text just stays stationary, I have no idea why.

  


  This is an example output (Its a video but this is all it shows the entire video) :


  


  Thanks