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• ffmpeg unknown keyword invalid data found when processing input

  16 novembre 2020, par Adriaan

  I have a file ffmpeg_list_of_files.txt with the content

  



  file '.\Output_0\forces_vs_radii.pdf'
file '.\Output_1\forces_vs_radii.pdf'
file '.\Output_2\forces_vs_radii.pdf'
file '.\Output_3\forces_vs_radii.pdf'
file '.\Output_4\forces_vs_radii.pdf'
and so on...


  



  and then run ffmpeg -f concat -i ffmpeg_list_of_files.txt -c copy output.mkv as is stated at

  



  http://trac.ffmpeg.org/wiki/Concatenate

  



  I, unfortunately, get the error

  



  Line 1: unknown keyword ' ■f'
.\ffmpeg_list_of_files.txt: Invalid data found when processing input


  



  in Windows PowerShell in Windows 10.

  



  What am I doing wrong ?

  


• Can someone help to build android app encoding video with instructions ? [closed]

  10 février 2024, par Ferel Ultra

  My friend would like to get app compressing video. I don't know how to do it by myself. Could someone to build it with instructions and give me ready app ?
The instructions :

  


  https://github.com/Javernaut/ffmpeg-android-maker

  


  https://github.com/fraunhoferhhi/vvenc/wiki/FFmpeg-Integration

  


• compile ffmpeg with x264

  29 juillet 2020, par y2kbug

  I need ffmpeg with hardware acceleration.
I am compiling ffmpeg following this guide :
https://gist.github.com/Brainiarc7/eb45d2e22afec7534f4a117d15fe6d89

  



  x264 never works after compile.
I follow the official guide, adding "—enable-shared", compile again, still no luck.
https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

  



  Simply installing libx264-dev does not work as well.

  



  


  $ ldd /bin/ffmpeg | grep x264 libx264.so.155 => not found

  


  



  Does anyone know how to make x264 work ?
Thanks.