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• ffmpeg with multiple live inputs [closed]

  9 juin 2013, par maddanio

  we are trying to get ffmpeg to combine multiple live streams into one. In principle we got it to work by mosaicing the streams like so :

  ffmpeg -rtsp_transport tcp -r 25 -i rtsp ://root:password@192.168.178.91:554/axis-media/media.amp \
  -rtsp_transport tcp -r 25 -i rtsp ://root:password@192.168.178.92:554/axis-media/media.amp \
  -filter_complex "[0:0]pad=iw*2:ih[a] ;[a][1:0]overlay=w" ...

  the problem though is that ffmpeg seems to start the input streams at significantly different times, so that there is about a 1 second shift between the streams, that remains throughout. Now we do have correct time stamps (pts) on both streams. Can we somehow tell ffmpeg to respect those and use them to align the streams correctly ?

• Is it possible to use FFMPEG for h264 live decoding ?

  9 avril 2018, par elpha01

  I’m receiving in my C#/.NET application a H264 stream as byte arrays.
  Firstly I receive the SPS and PPS and then all NAL_units.

  I haven’t find good tools to make h264 decoding so I’m currently using FFMPEG for testing with this article as help : A Simple c# Wrapper for ffMpeg

  For the moment I write the sps and the pps in a provisory .264 file with the first NAL unit then I decode it with FFMPEG. It works for the first frame but I don’t know how I can decode the following frame. I tried to rewrite the SPS and PPS in a second file with the second NAL unit without the first one but it doesn’t work.

  How can I use FFMPEG to decode a live h264 stream when receiving NAL units.

  Thank you

• Live streaming of processed frames to AWS

  22 avril 2021, par MinasCham

  I'm working on a project where i need to capture live video feed from an RTSP camera source, process the video frame-by-frame and stream the result to an AWS Service.

  


  So far, my solution :

  


  

  • Captures frames from the RTSP camera source using OpenCV and performs some processing.

  


  • Feeds the processed frames to an ffmpeg pipe that packages the content for online streaming (HTTP Live Streaming - hls) and saves it locally.

  


  • Transfers the media content to an Amazon Kinesis Video Stream using a Gstreamer pipeline element with kvssink as a sink element.

  


  


  My questions are :

  


  

  • Currently I'm saving the content both locally and on an Amazon Kinesis Video Stream. Is this efficient ?

  


  • Is it possible to directly stream the frames to the Amazon kinesis Video Stream (perhaps by connecting the ffmpeg output with the gstreamer pipeline element) ?

  


  • Is the file format suitable for this implementation or would it better to encode the media differently ?