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• Subtract a specific string from a variable in a for loop

  14 octobre 2020, par Filip

  I am making a file converter with batch using FFMPEG.

  


  I have encountered a problem when trying to subtract the name of a file from the complete link to the file to get the directory of the folder it is in so after the file is converted it can be put into that directory.

  


  Can someone advise me on how I could subtract the string from the filename variable from the string in the directory

  


  My code :

  


  @echo off
SETLOCAL ENABLEDELAYEDEXPANSION
set filetype=.flac
for /R %%a in ("*%filetype%*") do (
    set directory=%%a
    set filename=%%~na%filetype%
    set convdir=!directory:%filename%=!
    echo !convdir!
    pause
    ffmpeg -i "%%a" "convdir%%~na.wav"
    echo Converted %%a
)
echo Convertion Done!
pause


  


• aacsbr : Turnoff in the event of over read.

  20 mars 2017, par Alex Converse

  aacsbr : Turnoff in the event of over read.
  Aliased compressed AAC bytes are almost certainly not meaningful SBR
  
  data. In the wild this causes harsh artifacts switching HE-AAC streams
  
  that don’t have SBR headers aligned with segment boundaries.
  Turning off SBR falls back to a default set of upsampling parameters
  
  that can function as a sort of error concealment. This is consistent
  
  with how the decoder handles other sorts of errors.
  

  • [DH] libavcodec/aacsbr_template.c

• How to setup FFMPEGInterop to Use DRM playready

  1er novembre 2019, par marinamovies32

  I am using FFMPEGInterop class to play UWP video. I need to play it with playready setup but am running into issues.

  I can play playready with just mediaplayerelement and creating the protection manager, but when I create a FFMPEGMSS to stream it, than it fails. Says value is out of range when adding the protection manager to the MediaStreamSource.

  var StreamSource = FFmpegMSS.GetMediaStreamSource();
  
  var protectionManager = new Windows.Media.Protection.MediaProtectionManager();
  
  Windows.Foundation.Collections.PropertySet cpSystems = new Windows.Foundation.Collections.PropertySet();
  
  cpSystems.Add("{F4637010-03C3-42CD-B932-B48ADF3A6A54}", "Microsoft.Media.PlayReadyClient.PlayReadyWinRTTrustedInput"); //Playready
  
  protectionManager.Properties.Add("Windows.Media.Protection.MediaProtectionSystemIdMapping", cpSystems);
  
  protectionManager.Properties.Add("Windows.Media.Protection.MediaProtectionSystemId", "{F4637010-03C3-42CD-B932-B48ADF3A6A54}");
  
  protectionManager.ServiceRequested += ProtectionManager_ServiceRequested;
  
  protectionManager.ComponentLoadFailed += ProtectionManager_ComponentLoadFailed;
  
  
  
  protectionManager.Properties.Add("Windows.Media.Protection.MediaProtectionContainerGuid", "{9A04F079-9840-4286-AB92-E65BE0885F95}");
  
  
  
  var supportsHardwareDrm = PlayReadyStatics.CheckSupportedHardware(PlayReadyHardwareDRMFeatures.HardwareDRM);
  
  if (!supportsHardwareDrm)
  
  {
  
      protectionManager.Properties["Windows.Media.Protection.UseSoftwareProtectionLayer"] = true;
  
  }
  
  Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
  
  
  
  Header.Text = supportsHardwareDrm ? "SUPPORTED" : "NOT SUPPRTED";
  
  
  
  StreamSource.MediaProtectionManager = protectionManager;
  
  
  
  mediaElement.Source = MediaSource.CreateFromMediaStreamSource(StreamSource);

  I should be able to play playready DRM with a setup protection manager to start but down get any info on it so confused on the next step for it.