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• How to live stream a local video using FFmpeg

  7 mai 2017, par param trivedi

  I am trying to get used to the FFmpeg library, and currently, I have been trying to stream local video on VLC using FFmpeg.

  The command I have been using is :

  $ ffmpeg -i sample.mp4 -v 0 -vcodec mpeg4 -f mpegts udp://127.0.0.1:23000

  I have not been able to stream the file on VLC.

  Any help is appreciated.

• c# what is the best way to record live frames as Video

  13 février 2015, par Balu

  I have been checking around to convert live frames into video. And I found (NReco.VideoConverter) ffmpeg lib to convert live frames to Video, but the problem is it is taking time to write each frame to ConvertLiveMediaTask (async live media task conversion).

  I have an event that provides (raw) frames (1920x1080) (25fps) from IpCamera. Whenever I get frame I am doing the following

  //Image availbale event fired
  
  //...
  
  
  
  //...
  
  // Record video is true
  
  if(record)
  
  {
  
  //////////////############# Time taking part ##############//////////////////////
  
  var bd = frameBmp.LockBits(new Rectangle(0, 0, frameBmp.Width, frameBmp.Height), ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);                        
  
    var buf = new byte[bd.Stride * frameBmp.Height];                       
  
    Marshal.Copy(bd.Scan0, buf, 0, buf.Length);
  
    // write to ConvertLiveMediaTask
  
    convertLiveMediaTask.Write(buf, 0, buf.Length); // ffMpegTask
  
    frameBmp.UnlockBits(bd);
  
  //////////////////////////////////////////////////////////////////////////////////
  
  }

  As the above part is taking much time, I am loosing the frames.

  //Stop recording
  
  convertLiveMediaTask.Stop(); //ffMpegTask

  Stop recording, for this part I have used BackgroundWorker, because this takes too smuch time to save the media to file.
  My question is how can I write the frame to ConvertLiveMediaTask in faster way ? are there any possibilites to write it in background ?
  Please give me suggestions.

• ffmpeg : combine two mono live audio stream to single stereo stream

  28 juillet 2015, par Yuvrajsinh

  I have two live audio streams, they both are MONO streams.
  Now I want these two streams to merge in one stream and output to single new stream.

  I am merging two input streams with following command :

  ffmpeg -i rtmp://myIp:1935/live/stream1 -i rtmp://myIp:1935/live/stream2 -codec:a aac -strict -2 -filter_complex "[0:a][1:a]amerge" -f flv rtmp://myIp:1935/live/myStream

  The above command works but when I listen to new stream i.e. myStream, both streams are able to listen but in separate channel. Means stream1 is only in Left channel and stream2 is only in Right channel.

  What I want is, both input stream stream1 and stream2 should be available to both the channels (Left & Right).

  I have tried lot but can’t get success and I am not good at ffmpeg also. So Is there anyone who can help me in this ???