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• how to install portaudio19-dev and ffmpeg on ubuntu WSL

  28 mai 2021, par Joshua Aldrich Edbert

  I'm a windows user trying to run a command from ubuntu 20.04 LTS release on windows.

  


  sudo apt-get install gcc portaudio19-dev python3-dev ffmpeg


  


  After asking me to input a password, the terminal showed :

  


  reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package portaudio19-dev
E: Unable to locate package ffmpeg


  


  I'm not sure what happened as I'm new to this world. Any help would be appreciated !

  


• FFMPEG library Integration unsuccess

  1er septembre 2017, par Alok Kumar Verma

  I’m stuck with the integration of the FFMPEG file. I’m using Android Studio 2.3.3

  I’ve followed this link and hence got to know how to do this but all I’m getting is a failure.

  Links

  1. How to integrate the FFMPEG in your android
  2. Integrating android FFMPEG

  Now I"ve my ndk installed in this path : /Users/alok/Library/Android/sdk/ndk-bundle

  And I’ve downloaded the newest version of the FFMPEG i.e., 3.3.3 unzipped it in the sources folder of ndk-bundle

  Now I’ve followed this and implemented everything as said.

  • Editing the Configure File using TEXTVIEW in my mac

  • Creating a file name build_android.sh and copy pasting the given code. However I’ve changed the NDK path in my case in the code the code is here

    NDK=/Users/alok/Library/Android/sdk/ndk-bundle
SYSROOT=$NDK/platforms/android-23/arch-arm/
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64

  • Now opening the folder through terminal and then typing this command sudo chmod +x build_android.sh followed by this sudo ./build_android.sh

  The result is : No android name folder created inside under the folder FFMPEG 3.3.3 in this root i.e., /ndk-bundle/sources/ffmpeg 3.3.3/

  and the terminal shows this output :

  ./configure: line 3341: syntax error near unexpected token `2'

  ./configure: line 3341:

  DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>/dev/null | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(@F),$(@D)/$(@F)," > $(@:.o=.d)''
Makefile:2: config.mak: No such file or directory
Makefile:67: /common.mak: No such file or directory
Makefile:114: /libavutil/Makefile: No such file or directory
Makefile:114: /library.mak: No such file or directory
Makefile:116: /doc/Makefile: No such file or directory
Makefile:206: /tests/Makefile: No such file or directory
make: *** No rule to make target /tests/Makefile'. Stop.

  Hence I’m not been able to move next due to this which creating a JNI folder and stuff. I’m a beginner with FFMPEG and want to integrate it.

  NOTE : I’ve already used this library in my gradle

  compile ‘com.writingminds:FFmpegAndroid:0.3.2’

  For easy approach and things are working fine too but due to the older version I’m getting wrong outputs, so need to update it and there is one way and this is the way to do it.

• ASP.NET MVC - Converting Video Format From Email Attachment Scanner

  24 juillet 2018, par BenHayward

  We have a Quartz scheduler that scans the company email account every 60 seconds, and will process those emails accordingly. Any attachments are stored in a byte array.

  Video attachments need to be converted to an MP4 and then back to a byte array to be stored in the DB ; I am trying to use FFMPEG (fflib) to complete this, however I’m having trouble figuring out how it can be done with a byte array as the source - the company have stated that this conversion must be done before it enters the database.

  Is the conversion of a byte array possible using the Process Class to access the FFMPEG CLI ?

  Here is the code I currently have, just using local file locations (using fflib ffmpeg library).

   public IList<documentstoreattachment> AddDocumentsToDocumentStore(IList<fileattachment> documentsToStore, Guid personId, IList<documentattributedto> documentAttributes)
  
          {
  
              var storedDocuments = new List<documentstoreattachment>();
  
  
  
              foreach (var documentToStore in documentsToStore)
  
              {
  
                  try
  
                  {
  
                      if (IsExtensionAllowed(documentToStore.AttachmentName))
  
                      {
  
  
  
                          if (documentToStore.MimeType == "mpeg")
  
                          {
  
                              Job2Convert job = new Job2Convert()
  
                              {
  
                                  pszSrcFile = @"..\..\Amigo Loans 2018 Advert MPG.mpg",
  
                                  pszDstFile = @"C:\Users\ben.hayward\Desktop\Amigo Loans 2018 Advert MPG.mp4",
  
  
  
                                  pszDstFormat = "mp4",
  
                                  pszAudioCodec = "aac",
  
  
  
                                  nAudioChannels = 2,
  
                                  nAudioBitrate = -1,
  
                                  nAudioRate = -1,
  
  
  
                                  pszVideoCodec = "h264",
  
  
  
                                  nVideoBitrate = -1,
  
                                  nVideoFrameRate = -1,
  
                                  nVideoFrameWidth = -1,
  
                                  nVideoFrameHeight = -1
  
  
  
                              };
  
  
  
                              _sut.ConvertFile(job);
  
  
  
                          }
  
  
  
                          storedDocuments.Add(AddDocumentToDocumentStore(documentToStore.AttachmentName, documentToStore.ByteArray, documentToStore.MimeType, personId, documentAttributes));
  
                      }
  
                      else
  
                      {
  
                          Logger.WarnFormat("AddDocumentsToDocumentStore: File extension not allowed for file name: {0}, person id: {1}", documentToStore.AttachmentName, personId);
  
                      }
  
                  }
  
                  catch (Exception e)
  
                  {
  
                      #region Error
  
  
  
                      Logger.Error(String.Format("There was a problem saving the document to the document store. The file name was {0}, person id: {1}",
  
                          documentToStore.AttachmentName, personId), e);
  
  
  
                      #endregion
  
                  }
  
              }
  
  
  
              return storedDocuments;
  
          }
  
  </documentstoreattachment></documentattributedto></fileattachment></documentstoreattachment>

  Thank you in advance.