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• Adding trimming option to Youtube-dl audio script

  22 septembre 2020, par Jim Jamil

  This is the current script, it's a Windows batch file that prompts for a Youtube url and then downloads the best audio in m4a. It's basically cobbled together and uses aria2 to manage the download.

  


  @echo off
SETLOCAL ENABLEDELAYEDEXPANSION
(set /p var1="Url? " && youtube-dl -f bestaudio[ext=m4a] --external-downloader aria2c --external-downloader-args "-j 16 -s 16 -x 16 -k 5M" --restrict-filenames -o "%%(title)s.%%(ext)s" --add-metadata --embed-thumbnail !Var1!)
ENDLOCAL
pause


  


  After asking for the url, I want to also prompt the user to input the start and end times to trim the audio, which would be done by ffmpeg post download.

  


  Something like :

  


  ffmpeg -i file.m4a -ss 00:00:20 -to 00:00:40 -c copy file-2.m4a


  


  Based on this : https://unix.stackexchange.com/questions/182602/trim-audio-file-using-start-and-stop-times/302469#302469

  


  The beginning and end times would need to be variables set by user input in 00:00:00 format, but not sure how to add the ffmpeg post-processing at the end or how it would all fit together. I want to add this trimming feature to remove some of the preamble on podcasts and get straight to the guest part of the show.

  


  The --embed-thumbnail is optional, and won't work anyway unless Atomic Parsley is present. FFmpeg often has trouble with Album Art anyway so I usually just use -vn on the final output file.

  


• ffmpeg throws error when trying to remove subtitle track only when artwork is present [on hold]

  2 juillet 2014, par user226372

  Hi ffmpeg users/gurus/developers,

  I am having a peculiar problem.

  I have a media with 5 tracks (Notice the fifth one is album artwork)

  Stream #0:0(und) : Video : h264 (High)
  Stream #0:1(und) : Audio : aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 164 kb/s (default)
  Stream #0:2(und) : Audio : ac3 (ac-3 / 0x332D6361), 44100 Hz, stereo, fltp, 224 kb/s
  Stream #0:3(eng) : Subtitle : mov_text (tx3g / 0x67337874), 1280x60, 0 kb/s (default)
  Stream #0:4 : Video : mjpeg, yuvj420p(pc), 1000x1500 [SAR 1:1 DAR 2:3], 90k tbr, 90k tbn, 90k tbc

  All i am trying is to remove the subtitle track Stream #0:3(eng) : Subtitle by this command

  ffmpeg -i input.mkv -map 0:0 -map 0:1 -map 0:2 -map 0:4 -c copy output.mkv

  as explained here

  https://trac.ffmpeg.org/wiki/How%20to%20use%20-map%20option

  But i am getting this error

  Stream mapping:
  
  Stream #0:0 -> #0:0 (copy)
  
  Stream #0:1 -> #0:1 (copy)
  
  Stream #0:2 -> #0:2 (copy)
  
  Stream #0:4 -> #0:3 (copy)
  
  [ipod @ 0x103011000] Could not find tag for codec mjpeg in stream #3, codec not currently supported in container
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

  Conversion failed !

  If the input media doesn’t contain an artwork this error is not happening

  Any ffmpeg gurus who can help me with this issue please !!!!

• ffmpeg not converting mp3 to mp4 in flutter [duplicate]

  25 août 2020, par neena

  final String path = await _localPath ;
final Directory directory = await Directory('$path/CapturedImages').create(recursive : true) ;
print("The directory $directory is created") ;

  


    //print("Tempath::::::::::::::::: == $tempPath");
  String input = directory.path + '/' + "audio" + '.mp3';
  String output = directory.path   + "name" + ".mp4";
  final FlutterFFmpeg _flutterFFmpeg = new FlutterFFmpeg();
  _flutterFFmpeg.execute("ffmpeg -i $input $output").then((rc) => print("FFmpeg process exited with rc $rc"));

 Input #0, mp3, from '/storage/emulated/0/Android/data/quadauq.ffmpeg_examplebyneena/files/CapturedImages/audio.mp3':
I/mobile-ffmpeg(10080):   Metadata:
I/mobile-ffmpeg(10080):     genre           : 
I/mobile-ffmpeg(10080): Cinematic
I/mobile-ffmpeg(10080): 
I/mobile-ffmpeg(10080):     album           : 
I/mobile-ffmpeg(10080): YouTube Audio Library
I/mobile-ffmpeg(10080): 
I/mobile-ffmpeg(10080):     title           : 
I/mobile-ffmpeg(10080): Impact Moderato
I/mobile-ffmpeg(10080): 
I/mobile-ffmpeg(10080):     artist          : 
I/mobile-ffmpeg(10080): Kevin MacLeod
I/mobile-ffmpeg(10080): 
I/mobile-ffmpeg(10080):   Duration: 
I/mobile-ffmpeg(10080): 00:00:27.25
I/mobile-ffmpeg(10080): , start: 
I/mobile-ffmpeg(10080): 0.034531
I/mobile-ffmpeg(10080): , bitrate: 
I/mobile-ffmpeg(10080): 224 kb/s
I/mobile-ffmpeg(10080): 
I/mobile-ffmpeg(10080):     Stream #0:0
I/mobile-ffmpeg(10080): : Audio: mp3, 32000 Hz, stereo, fltp, 224 kb/s
I/mobile-ffmpeg(10080): 
I/mobile-ffmpeg(10080):     Metadata:
I/mobile-ffmpeg(10080):       encoder         : 
I/mobile-ffmpeg(10080): LAME3.99r
I/mobile-ffmpeg(10080): 
E/mobile-ffmpeg(10080): [NULL @ 0xec3b0800] Unable to find a suitable output format for 'ffmpeg'
E/mobile-ffmpeg(10080): ffmpeg: Invalid argument
I/flutter (10080): FFmpeg process exited with rc 1


  


  This is the log. The mp3 is reading but not converting to mp4 can anyone please help ?