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• How can I make a Transcoded Video Filestream using C# and .NET Core

  25 avril 2021, par Drew Chase

  Overview

  


  I'm currently working on a media streaming server using ASP.net Core REST Server. I'm currently using .net 5.0 and ASP.net Core MVC

  


  What I need

  


  I need to be able to dynamically down-res the original video file. from 1080p to 720p for example.
Also I need to be able to make the media file able to be transcoded to a different encoding based on client capabilities.

  


  What I've Tried

  


  I've been looking for a library that can manage this feat, but I can't seem to find one. I thought FFMpeg would be able to do this. I know this is possible because applications like plex and emby seem to manage this.

  


  What I've Done

  


  [HttpGet("/api/streaming/video")]
public IActionResult GetFile()
{
    string path = "C:\Path\To\Video\FILE.mp4";
    System.IO.FileStream stream = new(path, System.IO.FileMode.Open, System.IO.FileAccess.Read);
    Microsoft.AspNetCore.Mvc.FileStreamResult file = File(stream, "video/mp4", true);
    return file;
}


  


  Framework Tried

  


  

  • Xabe.FFmpeg

  


  • FFMpegSharp

  


  


• C# - Capture RTP Stream and send to speech recognition

  2 septembre 2017, par dgreenheck

  What I am trying to accomplish :

  • Capture RTP Stream in C#
  • Forward that stream to the System.Speech.SpeechRecognitionEngine

  I am creating a Linux-based robot which will take microphone input, send it Windows machine which will process the audio using Microsoft Speech Recognition and send the response back to the robot. The robot might be hundreds of miles from the server, so I would like to do this over the Internet.

  What I have done so far :

  • Have the robot generate an RTP stream encoded in MP3 format (other formats available) using FFmpeg (the robot is running on a Raspberry Pi running Arch Linux)
  • Captured stream on the client computer using VLC ActiveX control
  • Found that the SpeechRecognitionEngine has the available methods :
    1. recognizer.SetInputToWaveStream()
    2. recognizer.SetInputToAudioStream()
    3. recognizer.SetInputToDefaultAudioDevice()
  • Looked at using JACK to send the output of the app to line-in, but was completely confused by it.

  What I need help with :

  I’m stuck on how to actually send the stream from VLC to the SpeechRecognitionEngine. VLC doesn’t expose the stream at all. Is there a way I can just capture a stream and pass that stream object to the SpeechRecognitionEngine ? Or is RTP not the solution here ?

  Thanks in advance for your help.

• C# - Capture RTP Stream and send to speech recognition

  16 avril 2013, par dgreenheck

  What I am trying to accomplish :

  • Capture RTP Stream in C#
  • Forward that stream to the System.Speech.SpeechRecognitionEngine

  I am creating a Linux-based robot which will take microphone input, send it Windows machine which will process the audio using Microsoft Speech Recognition and send the response back to the robot. The robot might be hundreds of miles from the server, so I would like to do this over the Internet.

  What I have done so far :

  • Have the robot generate an RTP stream encoded in MP3 format (other formats available) using FFmpeg (the robot is running on a Raspberry Pi running Arch Linux)
  • Captured stream on the client computer using VLC ActiveX control
  • Found that the SpeechRecognitionEngine has the available methods :
    1. recognizer.SetInputToWaveStream()
    2. recognizer.SetInputToAudioStream()
    3. recognizer.SetInputToDefaultAudioDevice()
  • Looked at using JACK to send the output of the app to line-in, but was completely confused by it.

  What I need help with :

  I'm stuck on how to actually send the stream from VLC to the SpeechRecognitionEngine. VLC doesn't expose the stream at all. Is there a way I can just capture a stream and pass that stream object to the SpeechRecognitionEngine ? Or is RTP not the solution here ?

  Thanks in advance for your help.