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• Making jumping text watermark

  18 mai 2015, par robocop robocop

  I want to make something like these :
  http://www.youtube.com/watch?v=AtM-f20XV4E
  you can see there a watermark which change position every two second...

  But I need it for drawtext filter.

  So, I am already realize how to change a text position every few seconds..
  but have no idea - how to keep new position :)
  there is a code which I have right now..

  ffmpeg.exe -i myVideo.mov -c:v libx264 -preset veryfast -crf 25 -tune zerolatency -vendor ap10 -pix_fmt yuv420p -filter:v drawtext=fontfile=arial.ttf:text=MY_WATERMARK_TEXT:fontcolor=white:alpha=0.5:fontsize=74:box=1:boxcolor=red:x=if(eq(mod(t\,1)\,0)\,1000\,10):y=(h-text_h-line_h)/2 -c:a copy outVideo.mp4

  it move my text to new position every 1 second. but then immediately change position back of course.

  So, I stuck about that.. how to keep new position ?
  may be I should using ld() and st() ?

• Why is only one of multiple overlayed videos playing in FFmpeg ? [closed]

  27 mai 2023, par Sixtus Anyanwu

  Only one out of multiple overlayed videos is playing FFmpeg

  


  I am trying to overlay 2 playable videos on top of another video in ffmpeg.

  


  ffmpeg -hide_banner -i finalagain.mp4 -i Tatsumaki0trim.mp4 -i Tatsumaki1trim.mp4 -filter_complex "[0][1]overlay=x=(W-w)/2:y=(H-h)/2:enable='between(t,4,8)'[v1]; [v1][2]overlay=x=(W-w)/2:y=(H-h)/2:enable='between(t,0,4)'[v2]" -map "[v2]" -map 0:a -preset ultrafast trial.mp4

  


  But the 1st video gets played while the second remain static.
Here is the video on YouTube.
https://m.youtube.com/watch?v=XStgNnjTaLE&feature=youtu.be

  


• Possible bug in latest google chrome (v62) ?

  21 novembre 2017, par Jalal El-Shaer

  The following demo was working perfectly :

  http://jsfiddle.net/r6wz0nz6/2/

  The following is a sample of ’video-preview’ class in action :

  <a href="https://www.youtube.com/watch?v=v1uyQZNg2vE" target="_blank" class="video-preview" data-frames="100" data-source="http://i.imgur.com/BX0pV4J.jpg">
  
  </a>

  Now, if you use your mouse to scroll from left-to-right, somehow it is not working (shows thumbnail instead of current image position). This was working perfectly before v62. While, from right-to-left, it works normally.

  Updated Please watch how this looks here : https://www.youtube.com/watch?v=HvDP-YXJgOk

  Question : How can I overcome this bug/issue ?

  P.S. the demo is based on this blog post (https://www.binpress.com/tutorial/how-to-generate-video-previews-with-ffmpeg/138)

  Update 2
  Interesting, in the following part :

  elm.mousemove(function(e) {
  
  var left = e.clientX - elm.position().left;
  
  slider.show().css('left', left -1); // <<---------------------- this line
  
  img.css('left', -Math.floor((left / width) * frames) * width);

  if I remove the ’-1’ like so :
  slider.show().css('left', left);
  It works from Left-To-Right, but now from Right-To-Left is showing same bug !!

  Proposed Workaround by @A. Wollf
  Change the "mouseout" to "mouseleave" and it seems to fix it : http://jsfiddle.net/r6wz0nz6/388