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• Assistance required with filter graph construction(fast motion between times)

  6 janvier 2023, par D-MAN

  I am trying to re-create the following video, using ffmpeg.
https://youtu.be/eVQ9ysp0Pj0. "please check 0.19 minute for examples"
I have the following line of code which has most of the elements, except the part where is applies fast motion for 1s at certain outputs([vfr1][vfr2][vfr3])/times. currently it is only setpts=0.5*PTS[vboom] for the entire length of the video.

  


  exe = "-i " + file + " -i " + frame + " -i " + framestart + " -i " + frameEnd + " -i " + audioOverlay + " -filter_complex \"[0:v]pad="+mVideoWidth+":"+mVideoHeight+":576:0[vpad]; [vpad][1]overlay[vframed]; [vframed]split=3[vfr1][vfr2][vfr3]; [vfr1]reverse[vrev]; [vfr2][vrev][vfr3]concat=n=3,setpts=0.5*PTS[vboom]; [vboom][2]overlay=enable='lte(t,2)'[vpreout]; [vpreout][3]overlay=enable='gte(t,"+msec+"*3*0.5-2)' \" -map 4:a -b:v 8000k -shortest -preset ultrafast -crf 23 " + file2.getAbsolutePath();

  


  i have tried the following code snippets in various sections of the filter graph, with no luck !

  


  //[0:v]trim=0:2,setpts=PTS-STARTPTS[v1] ;[0:v]trim=2:5,setpts=2*(PTS-STARTPTS)[v2] ;[0:v]trim=5,setpts=PTS-STARTPTS[v3] ;
//[0:v]trim=0:10,setpts=PTS-STARTPTS[vfr1] ;[0:v]trim=10:30,setpts=PTS-STARTPTS[vfr2] ;[0:v]trim=start=30,setpts=PTS-STARTPTS[vfr3] ;
//[0:v]trim=2:3,setpts=0.75*(PTS-STARTPTS) ; [0:v]trim=4:5,setpts=0.75*(PTS-STARTPTS) ; [0:v]trim=7:8,setpts=0.75*(PTS-STARTPTS) ;
//[0:v]select='between(t,1,4)+between(t,4,6)',setpts=0.87*PTS ;

  


• Applying the same filter many times before output [duplicate]

  19 août 2019, par Fabián

  This question already has an answer here :

  • FFmpeg command to apply multiple filters and limit the final file size [closed]
    
    1 answer
    

  In my video there’s an object that has shades of yellow (more orange-like) and has a solid yellow as background.
  I need to output all frames into a png sequence, using a color key filter to replace the yellow from the background :

  ffmpeg -ss 4 -i original.mp4 -t 2 -filter_complex "[0:v]colorkey=0xfff31b:0.125:0[ckout]" -map "[ckout]" colorkey-%d.png

  This removes all the yellow background. However, it leaves some pints of yellow behind, and some items are yellow-themed, so blending isn’t an option for this scenario.

  In the end I need to get rid of 4 specific yellow-colors from the frames : 0xfff31b, 0xfae56b, 0xfaec46 and 0xeee2a0. My idea is to run the same filter for every color.

  So first I tried this :

  ffmpeg -ss 4 -i original.mp4 -t 2 -filter_complex "[0:v]colorkey=0xfff31b:0.4:0[ckout1];[0:v]colorkey=0xfae56b:0.4:0[ckout2];[0:v]colorkey=0xfaec46:0.4:0[ckout3];[0:v]colorkey=0xeee2a0:0.4:0[ckout4]" -map "[ckout4]" colorkeyrefined-%d.png

  Then this :

  ffmpeg -ss 4 -i original.mp4 -t 2 -filter_complex "[0:v]colorkey=0xfff31b:0.4:0[ckout]" -filter_complex "[0:v]colorkey=0xfae56b:0.4:0[ckout]" -filter_complex "[0:v]colorkey=0xfaec46:0.4:0[ckout]" -filter_complex "[0:v]colorkey=0xeee2a0:0.4:0[ckout]" -map "[ckout]" colorkeyrefined-%d.png

  But both display the same error :

  Filter colorkey has an unconnected output.

  Is there a way to apply the colorkey 4 times (with the mentioned values) in one go ?

• Revision 62848d2a87 : Merge "Avoid calling vp9_is_scaled two times in a function."

  25 septembre 2014, par hkuang

  Merge "Avoid calling vp9_is_scaled two times in a function."