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• FFmpeg concat in android

  13 avril 2018, par fvn

  I have trying to concat multiple videos (mp4 or mov)on Android Studio using FFMPEG. I have managed to get vidoes in an arrayList and their path like this :

  private List<string> getSelectedVideos(Intent data) {
  
  
  
          List<string> result = new ArrayList&lt;>();
  
  
  
          ClipData clipData = data.getClipData();
  
          if(clipData != null) {
  
              for(int i=0;icode></string></string>

  I have looked online on how to concat vidoes using FFMPEG https://trac.ffmpeg.org/wiki/Concatenate

  However I’m not sure how to do it using Android studio. Any help would be much appreciated.

• Cannot find a matching stream FFMPEG error [duplicate]

  6 mars 2018, par alan samuel

  This question already has an answer here :

  • FFmpeg concatenation, no Audio in Final Output
    
    1 answer
    
  • FFmpeg : concat multiple videos, some with audio, some without
    
    1 answer
    

  I am trying to merge two videos together. But I keep getting - Cannot find a matching stream for unlabeled input pad 3 on filter Parsed_concat_0.

  What does this mean ? And how can I fix this ?

  Here is the full log

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\Alan\Desktop\Pavanvideos\video1.mp4':
  
  FFMPEG LOG ITEM -   Metadata:
  
  FFMPEG LOG ITEM -     major_brand     : isom
  
  FFMPEG LOG ITEM -     minor_version   : 512
  
  FFMPEG LOG ITEM -     compatible_brands: isomiso2avc1mp41
  
  FFMPEG LOG ITEM -     encoder         : Lavf57.82.101
  
  FFMPEG LOG ITEM -   Duration: 00:00:12.79, start: 0.000000, bitrate: 2990 kb/s
  
  FFMPEG LOG ITEM -     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 2860 kb/s, 29.33 fps, 29.33 tbr, 11264 tbn, 58.67 tbc (default)
  
  FFMPEG LOG ITEM -     Metadata:
  
  FFMPEG LOG ITEM -       handler_name    : VideoHandler
  
  FFMPEG LOG ITEM -     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 156 kb/s (default)
  
  FFMPEG LOG ITEM -     Metadata:
  
  FFMPEG LOG ITEM -       handler_name    : SoundHandler
  
  FFMPEG LOG ITEM - Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\Alan\Desktop\Pavanvideos\video2.mp4':
  
  FFMPEG LOG ITEM -   Metadata:
  
  FFMPEG LOG ITEM -     major_brand     : isom
  
  FFMPEG LOG ITEM -     minor_version   : 512
  
  FFMPEG LOG ITEM -     compatible_brands: isomiso2avc1mp41
  
  FFMPEG LOG ITEM -     encoder         : Lavf57.82.101
  
  FFMPEG LOG ITEM -   Duration: 00:00:01.63, start: 0.000000, bitrate: 1768 kb/s
  
  FFMPEG LOG ITEM -     Stream #1:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 1762 kb/s, 29.50 fps, 29.50 tbr, 15104 tbn, 59 tbc (default)
  
  FFMPEG LOG ITEM -     Metadata:
  
  FFMPEG LOG ITEM -       handler_name    : VideoHandler
  
  FFMPEG LOG ITEM - Cannot find a matching stream for unlabeled input pad 3 on filter Parsed_concat_0

  Is this because, the second video is missing the sound handler ? How can I fix this from the video’s side ? Should it have the sound handler ?

• Limit number of Start-Process running in poweshell

  7 mars 2018, par Ahhhhhhhhhhhhhdfgbv

  I have tried to limit the number of Start-Process running from a Powershell, but I can’t seem to get it to work.

  I tried to follow this process : https://exchange12rocks.org/2015/05/24/how-to-limit-a-number-of-powershell-jobs-running-simultaneously/ and Run N parallel jobs in powershell

  But these are for Jobs not Processes, and I would like to remove the -Wait from the Start-Process

  My concern with the script is that if there are 1000 audio files in the folder, then FFMpeg would crash the system.

  ---

  # get the folder for conversion
  
  function mbAudioConvert {
  
      [Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms") | Out-Null
  
      [System.Windows.Forms.Application]::EnableVisualStyles()
  
  
  
      $fileBrowser = New-Object System.Windows.Forms.FolderBrowserDialog
  
      $fileBrowser.SelectedPath = "B:\"
  
      $fileBrowser.ShowNewFolderButton = $false
  
      $fileBrowser.Description = "Select the folder with the audio which you wish to convert to Avid DNxHD 120 25P 48kHz"
  
  
  
      $mbLoop     = $true
  
      $mbCount    = 0001
  
      $mbMaxJob   = 4
  
  
  
      while( $mbLoop ) {
  
          if( $fileBrowser.ShowDialog() -eq "OK" ) {
  
              $mbLoop     = $false
  
  
  
  
  
              $mbImage    = ( Get-Item -Path "C:\Users\user\Desktop\lib\AudioOnly.jpg" )
  
              $mbff32     = ( Get-Item -Path "C:\Users\user\Desktop\lib\ffmpeg32.exe" )
  
              $mbff64     = ( Get-Item -Path "C:\Users\user\Desktop\lib\ffmpeg64.exe" )
  
  
  
              $mbFolder   = $fileBrowser.SelectedPath
  
              $mbItemInc  = ( ls $mbFolder\* -Include *.mp3, *.MP3, *.wav*, *.WAV*, *.ogg, *.OGG, *.wma, *.WMA, *.flac, *.FLAC, *.m4a, *.M4a )
  
              $mbProgress = ( Get-ChildItem -Path $mbItemInc )
  
  
  
              $mbHasRaw   = ( $mbFolder + "\RAW" )
  
  
  
              if( !( Test-Path -Path $mbHasRaw ) ) {
  
                  # force create a RAW folder if it does not exist
  
                  New-Item -ItemType Directory -Force -Path "$mbHasRaw"
  
              }
  
  
  
  
  
              foreach( $mbItem in $mbItemInc ) {
  
  
  
                  $mbCheck    = $false
  
  
  
                  # output the progress
  
                  # Suggestion: You might want to consider updating this after starting the job and do the final update after running ex. Get-Job | Wait-Job to make the progress-bar stay until all processes are finished
  
                  #Write-Progress -Activity "Counting files for conversion" -status "Currently processing: $mbCount" -percentComplete ($mbCount / $mbItemInc.count*100)
  
  
  
                  # limit the run number
  
                  while ($mbCheck -eq $false) {
  
  
  
                      if( (Get-Job -State 'Running').count -lt $mbMaxJob) {
  
  
  
                          $mbScriptBlock = {
  
                              $mbItemName = $using:mbItem.BaseName
  
  
  
                              $mbNewItem  = ( $using:mbFolder + "\RAW\" + $mbItemName + ".mov" )
  
                              $mbArgs     = " -loop 1 -i $using:mbImage -i $using:mbItem -shortest -c:v dnxhd -b:v 120M -s 1920x1080 -pix_fmt yuv422p -r 25 -c:a pcm_s16le -ar 48k -af loudnorm=I=-12 $mbNewItem"
  
  
  
                              Start-Process -FilePath $using:mbff32 -ArgumentList $mbArgs -NoNewWindow -Wait
  
                          }
  
  
  
                          Start-Job -ScriptBlock $mbScriptBlock
  
  
  
                          #The job-thread doesn't know about $mbCount, better to increment it after starting the job
  
                          $mbCount++
  
                          $mbCheck  = $true          
  
                      }
  
  
  
                  }
  
              }
  
  
  
          } else {
  
  
  
              $mbResponse = [System.Windows.Forms.MessageBox]::Show("You have exited out of the automation process!", "User has cancelled")
  
              if( $mbResponse -eq "OK" ) {
  
                  return
  
              }
  
          }
  
      }
  
  
  
      $fileBrowser.SelectedPath
  
      $fileBrowser.Dispose()
  
  }
  
  
  
  # call to function
  
  mbAudioConvert