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• Modify the ffmpeg command to work with more than one image

  16 avril 2024, par Koi Farm ĐaMi

  ffmpeg -y -i image.jpg -filter_complex "[0:v] scale=1280 :-1,loop=-1:size=2,trim=0:40,setpts=PTS-STARTPTS,setsar=1,crop='w=1280:h=720:x=0:y=min(max(0, t - 3), (40 - 3 - 3)) / (40 - 3 - 3) * (ih-oh)'" unix.mp4

  


  I want to edit the above command so it can be used for multiple images or a folder containing many images. And give all images used the same size and aspect ratio. Please help me, thank you everyone.

  


• Video generated with Jcodec does not work in IOS device

  6 avril 2023, par Fagun Thakkar

  I have developed application which generates video with the help of Jcodec. But generated videos does not play in ios.Anyone know reason behind it ?
Also anyone know any good alter native for genrating video which works fine in al systems.

  


  I have tried jcodec and ffmpeg.
fmpeg takes lot of time while generating videos.
So i need solution in either jcodec or good new library.

  


• ffmpeg - Why does concatenating .ts videos through .txt fail from \folder\ but work from \folder\subfolder~?

  2 novembre 2020, par Winter

  I have a bunch of .ts videofiles that I want to merge into a single file so I can convert it to a .mp4 video.

  


  The .ts files are in a folder "E :\videotest" like :

  


  E:\videotest\0.ts  
E:\videotest\1.ts  
[...]  
E:\videotest\100.ts


  


  I used a PowerShell command to output the filepaths in a .txt file :

  


  foreach ($i in Get-ChildItem .\*.ts) {echo "file '$i'" >> mylist.txt}


  


  The resulting mylist.txt looks like :

  


  file 'E:\videotest\0.ts'  
file 'E:\videotest\1.ts'  
[...]    
file 'E:\videotest\100.ts'  


  


  When I run the command :

  


  ffmpeg -f concat -safe "0" -protocol_whitelist "file,http,https,tcp,tls" -i "E:\videotest\concat\mylist.txt" -c copy "E:\videotest\concat\combined_video.ts"


  


  I get the error :

  


  


  Line 1 : unknown keyword ' ■f'
  
E :\videotest\concat\mylist.txt :
Invalid data found when processing input

  


  


  But if I add a subfolder layer to the files like this :

  


  E:\videotest\0\0.ts  
E:\videotest\1\1.ts  
[...]  
E:\videotest\100\100.ts  


  


  And change mylist.txt to :

  


  file 'E:\videotest\0\0.ts'  
file 'E:\videotest\1\1.ts'  
[...]    
file 'E:\videotest\100\100.ts' 


  


  The same ffmpeg command will work and create the combined_video.ts file.

  


  Why does converting work with the subfolder structure but not from the main folder ?

  


  How do I adjust the ffmpeg command to make it work ?

  


  Thank you.