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• How do you create a crossfade transition between multiple videos in FFMPEG ?

  15 août 2017, par Katie Yamato

  I am currently looping MP4 videos with audio through FFMPEG. Here is the code

  del intermediate1.ts
  
  del f.txt
  
  echo file intermediate1.ts>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  echo file intermediate1.ts>>f.txt
  
  
  
  ffmpeg -i "SHORT MUSIC.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts -nostdin
  
  ffmpeg -f concat -i f.txt -c copy -bsf:a aac_adtstoasc "LONG MUSIC.mp4" -nostdin

  However, the transition between each instance of the videos is not smooth. It cuts off as the next instance is shown. Would there be a way create a blend/crossfade transition for the videos ?

  I have come across this method however, it is only for 2 videos
  https://superuser.com/questions/778762/crossfade-between-2-videos-using-ffmpeg

  Hope someone can help me !
  Thank you very much !!

• ffmpeg - Any way to add a transition to a list of clips to combine into a single video ?

  29 avril, par J. Pena

  Let's say I have a directory with 5 videos with the titles listed as the following

  


  

  • 1.mp4

  


  • 2.mp4

  


  • 3.mp4

  


  • 4.mp4

  


  • 5.mp4

  


  


  I created the text file named mylist.txt with the following written.

  


  file '1.mp4'
file '2.mp4'
file '3.mp4'
file '4.mp4'
file '5.mp4'


  


  I have an ffmpeg command that will combine these clips into one file beautifully already using the text file.

  


  ffmpeg -f concat -safe 0 -i mylist.txt -c copy combined.mp4


  


  My question is how can I add a fade transition to clips 2-4 using the text file ? The filter_complex parameter gives me an error.

  


  Streamcopy requested for output stream fed from a complex filtergraph. Filtering and streamcopy cannot be used together.


  


• java : Add transition between two videos

  23 janvier 2017, par Moosa

  I want to add custom effect between two videos using Java code. I am calling ffmpeg command line tool from java for merging multiple video file. I am also using ffmpeg to add cusmtom transition effect, such as fade in/fade out to get a simple effect but when I try to merge the file with effect, this file is not getting added properly(only audio is playing). So my question, is custom effect achievable with ffmpeg or should I shift to some other custom tool for adding animation to video before merging

  ffmpeg commands :

  1. For adding effect :

     ffmpeg -i 1.mp4 -y -vf fade=out:76:24 1f.mp4

  2. For merging video files :

     ffmpeg -f concat -i mylist.txt -c copy op.mp4

  mylist.txt contains the list of files to be merged