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• FFMPEG freeze last frame until end time

  7 novembre 2019, par Michael Joseph Aubry

  I have an animation that gets turned into a bunch of png’s. I am trying to keep the animation under 2 seconds. My users have a timeline where they can specify how long they want it to be visible.

  I take about 120 screenshots that will mean 120 frames gets passed through at 60 frames per second, which is 2 seconds. The user may want the text to be there for 5 seconds.

  My goal is to take the last frame and have it stay in the video until the specified end time.

  How can I take the 120th frame and keep it in the video until then using FFMPEG.

  Here is my generated command below.

  ffmpeg
  
          -i "http://storycreator.co:8181/unsplash/photo-1572800578930-fd1013b506c1?ixlib=rb-1.2.1&q=80&fm=jpg&crop=entropy&cs=tinysrgb&w=1080&fit=max&ixid=eyJhcHBfaWQiOjE1OTQxfQ" 
  
          -i "http://storycreator.co:8181/unsplash/photo-1573070303620-ea2602590e96?ixlib=rb-1.2.1&q=80&fm=jpg&crop=entropy&cs=tinysrgb&w=1080&fit=max&ixid=eyJhcHBfaWQiOjE1OTQxfQ" 
  
          -framerate 60
  
          -i "./e4634ba0-00fd-11ea-ac54-9d3618dabf3e-%d.png"
  
          -i "./watermark.png"
  
          -f lavfi
  
          -i color=c=white:s=1080x1080
  
  
  
          -ss 17.75
  
          -i "https://api.soundcloud.com/tracks/708135835/stream?client_id=d8976b195733c213f3ead34a2d95d1c1"
  
  
  
          -filter_complex "
  
          [0:v]scale=1983.2727272727273:1326.5454545454545[ovr1], 
  
          [1:v]scale=1283.3587786259543:1923.6641221374048[ovr2], 
  
          [2:v]scale=1080:1080,setpts=PTS-STARTPTS+(0/TB)[ovr3], 
  
          [3:v]scale=458:58[ovr4],
  
  
  
          [4:v][ovr1]overlay=-780.3636807528409:-69.33335182883523:enable='between(t,0,3.5799999999999996)'[int1],
  
          [int1][ovr2]overlay=-79.3167603470897:-45.92176131619752:enable='between(t,3.5900000000000003,15)'[int2], [int2][ovr3]overlay=0:0:enable='between(t,0,5)'[int3], [int3][ovr4]overlay=W-500:H-100:enable='between(t,0,15)'
  
  
  
          [out]
  
          "
  
          -map "[out]"
  
          -vcodec libx264
  
          -crf 27
  
          -preset veryfast
  
          -map 5:0
  
          -t 00:00:15
  
          /var/folders/m1/4swfw09137x2b3d2h3_y5wmw0000gn/T/tmp-9351clz63oHIdLu7/fc160990-00fd-11ea-ac54-9d3618dabf3e.mp4

• ffmpeg gif with color instead transparency

  22 mai 2020, par daniel

  I create a gif with transparency by :

  



  ffmpeg -y -i _frame%d.png -vf palettegen=reserve_transparent=1 palette.png
ffmpeg -framerate 8 -i _frame%d.png -i palette.png -lavfi paletteuse=alpha_threshold=128 -gifflags -offsetting animation.gif


  



  I need also to create another gif from it with a specific color instead of the transparency. What would be a fast way to do that ?

  


• Add an animated image to a video with FFMPEG

  3 juin 2019, par Wessam Sharaf

  I have a video named "input.mp4" and an image named "input.png", and I need an FFMPEG command to add the image to the video such that :
  * The image’s upper left point locates at position (image_x, image_y).
  * The image fades in the first t1 seconds and remains on the screen for t2 seconds and fade out till it disappears for t3 seconds. Meaning that t1 + t2 + t3 = total animation duration.