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• Using GStreamer to receive and send h264 video (from OBS)

  16 mars 2020, par Ivorius

  I’ve been trying to set up using GStreamer to get support for some input I can output from OBS.

  OBS : rtp_mpegts to udp ://localhost:5000

  http-launch 8080 webmmux streamable=true name=stream udpsrc uri=udp://localhost:5000 caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)MP2T-ES, payload=(int)
  
  33" ! gstrtpjitterbuffer latency=200 ! application/x-rtp ! rtpmp2tdepay ! video/mpegts ! mpegtsdemux ! video/x-h264 ! queue ! decodebin ! vp8enc ! stream.   audiotestsrc ! vorbisenc ! stream.

  However, using this it seems to accept connections, but just closes them again after a while. Any clues on what I am doing wrong ? I am open to any format changes as long as they’re supported by OBS / ffmpeg.

  As a bonus, how do I add support for audio as well ?

  Background

  I’ve found https://github.com/sdroege/http-launch, which works well in displaying a GStreamer video over http:

  <video autoplay="autoplay" controls="">
  
      <source src="https://localhost:8080" type="video/mp4" codecs="avc1.4D401E, mp4a.40.2">
  
      You browser doesn't support element <code>video
  .
  
  
  
  
  

  I’ve managed to set up a pipeline where I can use a GStreamer source to pipe into a http-launch
  pipeline and display it on video :

  http-launch 8080 webmmux streamable=true name=stream udpsrc port=5000 caps = "application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96" ! mpegtsdemu
  
  x ! h264parse ! TIViddec2 ! videoconvert ! vp8enc ! stream.   audiotestsrc ! vorbisenc ! stream.
  
  
  
  gst-launch-1.0 -v videotestsrc ! videoconvert ! x264enc tune=zerolatency bitrate=500 speed-preset=superfast ! rtph264pay ! udpsink host=127.0.0.1 port=5000

  However, I don’t think OBS supports rpt over UDP. It uses ffmpeg to send these packets, which can stream rtp_mpegts. I’ve found some code snippets which claim to support the format, and stitch together the above pipeline.

• Python Send FFMPEG stdout and stderr to Multiple files using for loop

  17 avril 2021, par D0n

  Here is my scripts

  


  csv_location = '/home/scripts/streams.csv'
ffmpeg_location = '/usr/bin/ffmpeg'
ffmpeglogs = '/home/scripts/ffmpeglog/'

# Open the streams list csv file
with open(csv_location) as csv_file:
    csv_reader = csv.reader(csv_file, delimiter=',')
    for row in csv_reader:
        ffmpeg_log = (ffmpeglogs + row[0]) # set the ffmpeg log to be named the stream name
        # Open log file for writing
        with open(ffmpeg_log, 'wb') as ffmpeg_output: 
            # Iterate through streams list
            for row in csv_reader:
                print(row)
                stream_output = (row[0] + ".mpeg") # stream output variable
                # Subprocess record 1 stream at a time & send the output t0 stdout & stdeer
                ffmpeg_instance = subprocess.Popen([ffmpeg_location, '-t', '10', '-i', row[1], stream_output], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
                # sent output to ffmpeg log
                ffmpeg_output.write(ffmpeg_instance.communicate()[1])


  


  Here is my CSV File

  


  Name,RTSP_URL
stream1,rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov
stream3,rtsp://wowz.streamlock.net/vod/mp4:BigBuckBunny_115k.mov
stream4,rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov


  


  So I have a script that reads a CSV file and ffmpeg records the video for 10 seconds. Then spits the output of the FFMPEG to a file. I need each camera to have its own file. Really just to log FFMPEG output for each camera. But my issue is that the FFMPEG output for multiple cameras get written to 1 file.

  


  Here is what I want to see in /home/scripts/ffmpeglog/

  


  stream1 stream3 stream4


  


  Here's what I'm actually what I see in /home/scripts/ffmpeglog/

  


  name stream1


  


• How to send av1 encoded stream to a mediamtx server ?

  17 juillet 2023, par Managor

  I want to test streaming av1 encoded video from the command line but I don't have enough expertise to know if I'm doing something wrong or if it's simply unsupported.

  


  So far I've tried gst-launch-1.0 videotestsrc ! av1enc ! rtspclientsink location=rtsp://localhost:8554/usbcamera and ffmpeg -f v4l2 -i /dev/video1 -c:v libsvtav1 -an -f rtsp rtsp://localhost:8554/usbcamera

  


  Using a file source with ffmpeg works with ffmpeg -re -stream_loop -1 -i av1noaudio.mp4 -f rtsp rtsp://localhost:8554/usbcamera but not with gstreamer gst-launch-1.0 filesrc location=av1test.mp4 ! videoconvert !  rtspclientsink location=rtsp://localhost:8554/usbcamera