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• ffmpeg output file the same length as source files

  29 mars 2020, par b1nkh4x0r

  I want to create a mixdown that will be the exact same length as the two files that I’m overlaying.

  I’ve got an instrumental (accompaniment.mp3) and vocal (vocals.mp3) file.

  accompaniment.mp3 file is duration=**178.863600**
  
  vocals.mp3        file duration=**178.863600**

  When I successfully create a mixdown of the two audio files into one (mixture.mp3) the output file is longer.

  ffmpeg -i accompaniment.mp3 -i vocals.mp3 -filter_complex amerge=inputs=2 -ac 2 mixture.mp3
  
  mixture.mp3       file duration=**178.886531**

  How can I create a mixdown that is the exact same length as the source files ?

• only last four entries of .ts files found in out.m3u8 file when I am using ffmpeg to convert mp4 to m3u8 format why

  30 novembre 2020, par Pythonsguru

  When I am using following command to convert .mp4 15 second video to .m3u8 format with hls_time 1 it convert in 15 .ts files using ffmpeg after successful conversation but when open the out.m3u8 file I Found only last four .ts file in out.m3u8 instead of 15 .ts files entries, please help what should I do for getting all 15 files in out.m3u8

  


  ffmpeg -i video.mp4 -c:v h264 -flags +cgop -g 30 -hls_time 1 out.m3u8

  


• Convert .MOD video files to .mp4 but maintain original file date

  27 février 2016, par Barryman9000

  Windows 10,
  ffmpeg

  I’m very new to ffmpeg so I can’t figure this out. I’m trying to use a command to copy then convert all .MOD video files in a directory to .mp4 files and keep the original date that the .MOD file was created. I don’t understand how to map the current file in the loop to the map_metadata option. This command works but doesn’t maintain the metadata (taken from this post)

  FOR /F "tokens=*" %G IN ('dir /b *.MOD') DO ffmpeg -i "%G" -acodec copy "%~nG.mp4"

  I’ve tried including the map in the above command but get various errors, mostly "invalid input file index : 1". The commands below will copy and convert but the new .mp4 files don’t have the original file date so I must be using map_metadata incorrectly :

  FOR /F "tokens=*" %G IN ('dir /b *.MOD') DO ffmpeg -i "%G" -acodec copy -map_metadata 0 "%~nG.mp4"
  
  
  
  FOR /F "tokens=*" %G IN ('dir /b *.MOD') DO ffmpeg -i "%G" -map_metadata 0 -acodec copy "%~nG.mp4"

  Any suggestions ? Thanks

  UPDATE

  I got this with Powershell ! (thanks to this post)

  $oldvids = Get-ChildItem *.MOD -Recurse
  
  foreach ($oldvid in $oldvids) {
  
      $newvid = [io.path]::ChangeExtension($oldvid.LastWriteTime.toString("MMMddyyyy_HHmmss"), '.mp4')
  
      ffmpeg.exe -i $oldvid.FullName -c:v libx264 -crf 18 -c:a aac -q:a 100 $newvid
  
  }

  input : MOV01E.MOD (Created date 4/1/2012 10:10 AM)

  output : Apr012012_101005.mp4

  ANOTHER UPDATE

  The above command kind of works but I just realized all of the files are output to the root directory. I changed the command a bit but I’m not sure what’s going on :

  Get-ChildItem *.MOD -recurse | % {
  
      $newvid =  [io.path]::ChangeExtension($_.LastWriteTime.toString("MMMddyyyy_HHmmss"), '.mp4')
  
      ffmpeg.exe -i $_.FullName -c:v libx264 -crf 50 -c:a aac -q:a 100 $newvid
  
  }