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• How to apply zoompan filter on GIF using FFMPEG

  21 juin 2021, par Pradeep Kumar

  I am creating a video using images with audio length using FFMPEG. In which i have following inputs a background image, a overlay gif, text overlay png file and a watermark png image. I want to add a zoom in out animation effect on overlay.gif file. The animation effect is working fine But the GIF is not working as expected, it is showing as an image. This is working fine with the jpeg/png file. How can i achieve this so GIF is working as expected ?

  


  I am using below command.
  
This command also change the shape of the GIF.

  


  ffmpeg -loop,1,-i,background.jpg,-ignore_loop,0,-i,overlayfirst.gif,-loop,1,-i,textOverlay.png,-i,watermark.png,-i,audio.mp3,-filter_complex,[1]scale=493:493,zoompan=z='if(lte(mod(on,60),10),zoom+0.0020,zoom-0.0020)':x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)':d=200:s=493x493,geq=lum='p(X,Y)':a='st(1,pow(min(W/2,H/2),2))+st(3,pow(X-(W/2),2)+pow(Y-(H/2),2));if(lte(ld(3),ld(1)),255,0)',rotate=0.06*PI*t:c=black@0.0:ow='hypot(iw,ih)':oh=ow[b];[2]scale=375:375,rotate=0.06*PI*t:c=black@0.0:ow='hypot(iw,ih)':oh=ow[pic2];[3]scale=100:50[watermark];[0:v][b]overlay=(W-w)/2:(H-h)/2[over1],[over1][pic2]overlay=(W-w)/2:(H-h)/2[pic3],[pic3][watermark]overlay=(W-120):(H-60),scale=830:830,format=yuv420p,-ss,00:00:00,-to,00:00:07,-c:v,mpeg4,-b:a,3M,-c:a,aac,-b:a,192k,-q:v,1,-shortest,output.mp4


  


  I also checked this link

  
Please help me. Thanks in advance

  


• Generate a .JSON file in After Effects or Premiere ?

  9 avril 2021, par Ryan

  I am working on a video template app where users can pick a video template and add their images as background layer and render a .mp4 video.

  


  Each template which I upload to the server is a Zip file which consists of 4 elements
1 : Background Video
2 : Source Images
3 : Output Video
4 : .JSON file

  


  I am a motion designer and not good with code, however when I check the .JSON file, I can tell that its holding some sort of animation data, I can see the text pointing towards the source images and the background video and a bunch of other text data which I think is basically animating the source images.

  


  Now being a motion designer, I can make some really nice animation overlays and simply replace it with the BACKGROUND VIDEO element and yes it works. And I can make as many animation templates I want using this one .JSON file.

  


  However (This is where the limitation starts), even though I can have really exciting overlay animations, the base source images are just 3 images fading in and out, and this data is coming from the .JSON file.

  


  What would be really nice, is if I could some how create/generate my own .JSON files, this way I can have the source images animate however I like (Position, Scale, Rotate) but I have no clue how this .JSON can be generated.

  


  This link has the main files which make up one template. You can check the .JSON file and how it works with other elements.
One Template Files

  


• Passing ffmpeg command containing % through Python subprocess

  20 février 2021, par GregH

  I'm trying to build a GUI with Tkinter where a set of images is converted, via press of a button, to an .mp4 video.

  


  When I run the following from the command line, all is well :

  


  > "ffmpeg -r 5 -i ptimage%03d -crf 20 animation.mp4"


  


  However, in Python, the following gives me an error that I think is related to passing the % in the argument :

  


  commandString = "ffmpeg -r 5 -i ptimage%03d -crf 20 animation.mp4"
args = shlex.split(commandString)
p = subprocess.run(args)


  


  The error I get is ptimage%03d: No such file or directory. I'm 99% sure I'm running the command from the right directory ; when I run the same command replacing ptimage%03d with ptimage000.jpg, a specific image the list, I get a (really short) video successfully.

  


  I've tried escaping the % with \%, but that doesn't help.

  


  Any ideas ?