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• How to choose the thumbnail of the first video instead of the second video when you concatenate them with FFMPEG ?

  4 octobre 2018, par Lanh Dien Xa Tam

  I’ve been using FFMPEG to bulk add outro to my videos. This is the code I use :

  for %%f in (*.mp4) do (
  
    echo.>%%f.txt
  
    echo file '%%f' >> %%f.txt
  
    echo file 'outro/outro.mp4' >> %%f.txt
  
  )
  
  
  
  for %%f in (*.txt) do (
  
     ffmpeg -f concat -i %%f -c copy concatenated/%%f.mp4
  
  )

  The problem is the thumbnail of the output videos is always is the second video’s (the outro) but not the first. Does anybody here know how to pick the first video thumbnail to be the output’s thumbnail instead of the second’s ?

• Stitching 6 video files into one 360 video in Ubuntu Linux

  1er mai 2020, par Essam Gouda

  I used 2 raspberry PIs to record 2 different videos in sync using a OSC server so the videos are perfectly in sync and I send them to a Linux server so I can stitch these videos and produce one 360 video file so far I have tried doing that on 2 videos just for testing purposes using two methods :
1- only ffmpeg :
By simply concatinating two videos into one but this doesn't produce a 360 video as seen here

  



  2- using ffmpeg and hugin following this tutorial (https://medium.com/@xorgol/stitching-multi-camera-360-video-an-open-source-workflow-bb8b1e72925) :
The problem here is I needed to do this method on each video file I have and then concatenate both videos to produce this result

  



  The original video can be seen here its captured using the RPI camera module V2 using a lens that provide a resolution of 3280x2464.


  



  I don't mind a bit of overlapping or anything I just need to produce a 360 video from 2 videos using two vamera with 180 degrees FOV and be able to view them using a 360 video player so your help is appreciated.

  


• jffmpeg.jar how to split a video file to many chunks- Java, Groovy, Grails, Video

  9 janvier 2014, par user1245222

  I was googling whole day to find a proper documentation to split a video using jffmpeg.jar. But unfortunately, I couldn't find anything.

  Using java -> groovy, I was able to use native command to split the same. Below is the command.

  def command = """ffmpeg -i /opt/eboxdata/uploads/719/Resource/Alfred Hitchcock - Making of Psycho.mp4 -vcodec copy -acodec copy -ss 00:00:00 -t 00:05:00 /opt/eboxdata/uploads/719/Resource/output2.avi"""// Create the String
  
  
  
          def proc = command.execute()                 // Call *execute* on the string
  
          proc.waitFor()

  Any one could help me to split a video file without using native command. But using jffmpeg.jar