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• Best way to get poster photo from mp4 upload - orientation issues

  14 février 2018, par wuzz

  The issue I am encountering is Orientation rotating via ffmpeg after I capture a frame for the poster photo, its one from a number of different orientations. The video of course looks fine, but the poster photo is all over the place depending on the device and which camera it is using. My code is as follows, this is what I have tried so far..

  $command_to_execute = "ffmpeg -vframes 1 -ss 1/2 -i " . $video_path . " " . $video_image_dir . $video_name . ".jpg -y";

  So obviously there isn’t a lot to that code, but everything else I have tried fails regardless, especially considering there is no exif data in that output jpg file from ffmpeg. Most likely have to get the orientation from the video before that, but I’m having issues on what I’ve tried there so far, like ffprob

  Thanks

• Create poster with overlay and scale

  16 juillet 2017, par timgavin

  I’m working on creating a thumbnail from a video and adding an overlay. The following is working great ; it outputs a JPG with the PNG overlay.

  ffmpeg -ss 15 -i input.mp4 -i play-button.png \
  
  -filter_complex overlay='(main_w-overlay_w)/2:(main_h-overlay_h)/2' \
  
  -vframes 1 poster.jpg

  However, I’d like to scale the thumbnail down, so I tried adding scale='min(640\, iw):-1'

  ffmpeg -ss 15 -i input.mp4 -i play-button.png \ 
  
  -filter_complex overlay='(main_w-overlay_w)/2:(main_h-overlay_h)/2' \
  
  -vframes 1 scale='min(640\, iw):-1' poster.jpg

  But when doing that I receive errors

  Unable to find a suitable output format for 
  
  'scale=min(640\, iw):-1' scale=min(640\, iw):-1: Invalid argument

  I’ve tried qscale and adding image2, and playing around with a lot of different options but just can’t find the one that works.

  Edit

  This is what I was previously using to create my poster image, I just needed to add an overlay. But when trying to combine the two it all fell apart.

  ffmpeg -ss 15 -i input.mp4 -f image2 -vf scale='min(640\, iw):-1' \
  
  vframes 1 poster.jpg

• Embed a Youtube with a MP4 File as poster

  29 août 2021, par adampl

  I want to embed a youtube video with a 10 second silent looping MP4 file as the poster.

  


  Currently, I am using the Wordpress video shortcode with my MP4 as the poster source, it works on some browsers but not all. Can anyone help ? I would prefer to find a pure HTML solution separate to the wordpress shortcode as I will need to get this to work on other CMSs.

  


  [video src="https://www.youtube.com/watch?v=[videoID]" poster=<video autoplay="autoplay" loop="loop" muted="muted" playsinline="playsinline">&#xA;  <source src="/wp-content-directory/intro.mp4" type="video/mp4">&#xA;</source></video>]&#xA;

  


  What i have found is to get a looping MP4 work on all browsers, I have to use this tag with the autoplay loop muted and playsinline

  


  <video autoplay="autoplay" loop="loop" muted="muted" playsinline="playsinline">&#xA;<source src="/directory/intro.mp4" type="video/mp4">&#xA;</source></video>&#xA;