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• Using ffmpeg apply filters to a Video memory stream. Is it possible ?

  1er octobre 2015, par Faisal Mq

  I have a requirement where I will be downloading my Video file data present on an Azure BLOB. I will get this Video file data in the form of a MemoryStream.

  Is there any way that using ffmpeg I can process this MemoryStream e.g removing audio, blurring video etc ?

  If its not possible then I will have to download the BLOB file somewhere on my Server in the form of .mp4 and then do the processing by ffmpeg. But actually I want to avoid this step of creating file on hard disk downloaded via MemoryStream.

  Here is the sample/pseudo code :

  public void ProcessVideoFile(string containerName, string blobURI)
  
  {
  
      CloudBlockBlob blob = GetBlockBlobReference(containerName, blobURI);
  
  
  
      using (var memStream = new MemoryStream())
  
      {
  
          blob.DownloadToStream(memStream);
  
  
  
          // Process this memStream using ffmpeg for different filters e.g blurring, remove audio etc.
  
          // ......................
  
      }
  
  }

• avcodec/v4l2_m2m_enc : Support changing qmin/qmax

  19 janvier 2020, par Andriy Gelman

  avcodec/v4l2_m2m_enc : Support changing qmin/qmax
  Hard coded parameters for qmin and qmax are currently used to initialize
  
  v4l2_m2m device. This commit uses values from avctx->qmin,qmax if they
  
  are set.
  Reviewed-by : Ming Qian <ming.qian@nxp.com>
  
  Signed-off-by : Andriy Gelman <andriy.gelman@gmail.com>
  

  • [DH] libavcodec/v4l2_m2m_enc.c

• c# or csharp ffmpeg using way

  3 février 2017, par Asif Shariar

  I have read
  C# universal platform audio merge or input in video. As I get the solution to use composition media which makes my mp4 size too big after rendering the file but the original mp4 file size is small, for example
  video.mp4 [size 30mb] background add audio.mp4 [1.2 mb]
  after render file with profile videoencoder filesize get 400 mb.

  So I decided to use ffmpeg in my c# project. I compiled ffmpeg and added in my project all the library .dll. Now how can I use this command ?

  ffmpeg -i video -i audio -c copy output

  How can I use this command by the library ?

  I have these .dll in my csharp project

  • libavutil.dll
  • libavcodec.dll
  • libavformat.dll
  • libavdevice.dll
  • libavfilter.dll
  • libswscale.dll
  • libswresample.dll
  • libpostproc.dll

  The question is how can we use this .dll to do that works ?

  i hard it called muxxing.cs

  If anyone knows what to do, please provide details. Examples of prj sample would be great.