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• %a and %%a suddenly don't work in Win 10 cmd and batch file respectively ?

  14 janvier 2017, par cobaltB12

  I was trying to batch convert a folder of .flac to .mp3 using FFMPEG, but when i ran my batch file I got the "%F is unexpected at this time" error, even though i used "%%F" in the batch file. To test what was really the problem, i proceeded to type variations of %F into cmd directly, but could not get it to work either. Did something change in windows 10 regarding the use of variable names in the for loop ?

  cmd commands I tried :

  C:\Users\yt\Music\Joe Hisaishi (Classical Guitar) - Copy>for "%F" in     (*.flac) echo %F
  
  "%F" was unexpected at this time.
  
  
  
  C:\Users\yt\Music\Joe Hisaishi (Classical Guitar) - Copy>for %F in     (*.flac) echo %F
  
  echo was unexpected at this time.
  
  
  
  C:\Users\yt\Music\Joe Hisaishi (Classical Guitar) - Copy>for "%%F" in     (*.flac) echo %%F
  
  "%%F" was unexpected at this time.
  
  
  
  C:\Users\yt\Music\Joe Hisaishi (Classical Guitar) - Copy>for "%f" in     (*.flac) echo %f
  
  "%f" was unexpected at this time.
  
  
  
  C:\Users\yt\Music\Joe Hisaishi (Classical Guitar) - Copy>for "%g" in     (*.flac) echo %g
  
  "%g" was unexpected at this time.
  
  
  
  C:\Users\yt\Music\Joe Hisaishi (Classical Guitar) - Copy>for "%g" in     ("*.*") echo %g
  
  "%g" was unexpected at this time.
  
  
  
  C:\Users\yt\Music\Joe Hisaishi (Classical Guitar) - Copy>for "%g" in     ("*.*") do echo %g
  
  "%g" was unexpected at this time.

  original batch file for FFMPEG

  cd "\Users\yt\Music\Joe Hisaishi (Classical Guitar) - Copy"
  
  echo in directory "%cd%"
  
  pause
  
  for "%%F" in ("*.flac") do (
  
  echo converting "%%F"
  
  "C:\Users\yt\Downloads\OtherApps\FFMPEG\bin\ffmpeg.exe" -i "%%F"     -codec:a libmp3lame -qscale:a 2 "%%~nF.mp3"
  
  echo del "%%F"
  
  )
  
  cd "%~dp0"

• How do I access the ipod-library for decoding ffmpeg ?

  16 janvier 2014, par M_On

  Thank you to look at my question.

  There is a problem with too slow to access the music file using ffmpeg.

  Get the URL of the music that is in the ipod-library by using the 'valueForProperty:MPMediaItemPropertyAssetURL' method.

  Use the (AVAssetExportSession Class) TSLibraryImport.m, extract the music files from ipod-library.

  However, I took the extraction time is too long. (4 seconds of the 3GS iPhone, iPhone 5 is 1 second)

  It was not possible to be decoded using FFmpeg If you do not the Export.

  In order to use FFmpeg, it's AVPlayer can not be used.

  I will never forget the grace if you can answer if you folded to know how other maybe.

• Merge video and audio with ffmpeg. Loop the video and the audio

  21 avril 2021, par Mangaku

  Refering to this : Merge video and audio with ffmpeg. Loop the video while audio is not over

  


  One answer, well working is :
ffmpeg  -stream_loop -1 -i input.mp4 -i input.mp3 -shortest -map 0:v:0 -map 1:a:0 -y out.mp4

  


  Thing is that at the end of the music everything stop. Any idea to loop the music too ?
Like an endless video loop over the music, with an endless music loop.