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• FFMPEG : Create silent .ogg audio file

  29 mai 2016, par James Newton

  In answer to the question "How-to make a silent mp3 or wav-file" on ubuntuforums.org FakeOutdoorsman provided the following recipe :

  Another method by using FFmpeg. 60 seconds of silent audio in WAV :

  ffmpeg -ar 48000 -t 60 -f s16le -acodec pcm_s16le -ac 2 -i /dev/zero -acodec copy output.wav

  60 seconds of silent audio in MP3 :

  ffmpeg -ar 48000 -t 60 -f s16le -acodec pcm_s16le -ac 2 -i /dev/zero -acodec libmp3lame -aq 4 output.mp3

  How could I do something similar to create a silent .ogg audio file ?

  For a web app, I want to create a very short file for testing whether the browser will preload an audio file, or whether it will wait until the file is actually played before starting to stream it.

• How to create a video in .net6 [closed]

  22 mai 2023, par mans

  I am trying to create a video from a series of images i .net core (6.0)

  


  I am looking for a solution like this :

  


  VideoCreator video=new VideoCreator("MyVideo.mp4");

for (int i=0;i<1000;i++)
{
     var image=getImage();
     video.addFrame(image);
}
video.close();


  


  I already tried these solutions, and I could not make them work or compile :

  


  OpenCVSharp

  


  This is compiling properly in .net 6 but is sot reliable when writing videos. I could get a blank video, especially if the getImage function took a long time to return an image (for example, 20 sec) and the above code is run in a thread. All in one : the system did not produce video reliably.

  


  AForge.net

  


  This library and its related library (Accord.NET) don't work on.net core. My attempt to use them did not produce any compilable software (for example AForge.video.ffmpeg or AForge.Video.VFW) are not available in .net core).

  


  So my questions :

  


  

  1. What is the best way to create a video in .net core reliably ?

  


  2. I am using .net core as I am using Microsoft ML engine, is the ML engine available for framework ?

  


  3. My target platform is Windows, is there any way that I can combine .net and framework applications/libraries ?

  


  


• How to create an RTSP server to stream from webcam ?

  24 février 2021, par Dhananjay Chobhe

  I want to create an RTSP streaming server using my integrated webcam and later on using the same stream server to click pictures using java code. I did some research and there are several options available such as FFmpeg, wowza, etc but I don't know how to use them properly. I am using windows OS. I want the streaming server to be localhost. And i can use this link to actually take pictures in java.