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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 ?

  


• Best practice FFmpeg command, for convert video(unknown quality) to .m3u8 with 1080p,720p,480p quality

  2 mars 2019, par sadegh

  I’m working on a video share service like youtube.com
  
  When an user upload a video i need to create a .m3u8 file
  below item are important :
  1- i don’t know what quality the file have (1080p,720p,480p,360p)
  2- i don’t know what format the file have (MPEG4(mp4),flv,AVI,WMV)
  3- i have .str subtitle
  
  I need export with this Specification :
  1- .m3u8 output support all quality(1080p,720p,480p,360p) if input file quality support
  2- .ts files length be the best practice (2sec, 5sec, 10sec or other is better)
  3- output file support subtitle
  
  What is the best command(or commands) for create this output using ffmpeg ?
  
  here is a very good .m3u8 that is my target :
  https://bitdash-a.akamaihd.net/content/sintel/hls/playlist.m3u8
  
  thank you

• Unknown encoder 'libfaac'

  18 novembre 2020, par hyperrjas

  I'm using carrierwave-video to upload video with my ruby on rails app. But I have this problem when try encode the video :

  



  Unknown encoder 'libfaac'

Errors: no output file created.


  



  I have tried with :

  



  sudo apt-get install libfaac-dev


  



  but I get the same error.

  



  Updated :

  



  After compile ffmpeg, I get the same error :

  



  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42isomavc1
    creation_time   : 2011-10-13 18:54:50
    encoder         : HandBrake 0.9.5 2011010300
  Duration: 00:06:43.28, start: 0.000000, bitrate: 380 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 960x600 [SAR 1:1 DAR 8:5], 279 kb/s, 9.25 fps, 25 tbr, 90k tbn, 180k tbc
    Metadata:
      creation_time   : 2011-10-13 18:54:50
      handler_name    : 
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, mono, s16, 97 kb/s
    Metadata:
      creation_time   : 2011-10-13 18:54:50
      handler_name    : 
Please use -q:a or -q:v, -qscale is ambiguous
Unknown encoder 'libfaac'

Errors: no output file created.