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• FFmpeg set_buflen while playing RTMP stream

  10 avril 2020, par lorenzop

  I am using sergey-dryabzhinsky/nginx-rtmp-module to build a RTMP server with nginx.
I am streaming a video with FFmpeg to a nginx RTMP app :

  



  ffmpeg -re -i .\video_glasses.mp4 -f flv rtmp://[domain]/input/cam_1


  



  and i want to process it with Python, so I open the stream launching a FFmpeg process from Python like this :

  



  ffmpeg -i rtmp://nginx/input/cam_1 -map 0:v -f rawvideo -pix_fmt rgb24 -vsync 0 pipe:


  



  Here i use vsync 0 to avoid duplicated frames.
I launch the Python program and it waits for the stream. Once the stream has begun, the program sets up some suff and then begins to process the video. Obiviously some time passes. The program correctly processes about 250 frames of video (about 4 sec @ 30 fps) and then blocks because reading from FFmpeg input blocks. In the meantime, the input streaming process has done streaming about 24sec of video.

  



  My best guess is that the maximum buffer of nginx RTMP is full so everything stops. Default buflen for nginx is 20s. I tried to increase it :

  



  #Sets default buffer length. Usually client sends RTMP set_buflen command before playing and resets this 
#setting. Default is 1000 ms.
buflen 50000s;


  



  but nothing changes. So I think the reading FFmpeg process is resetting buflen. I tried

  



  ffmpeg -bufsize 50M -i rtmp://nginx/input/cam_1 -map 0:v -f rawvideo -pix_fmt rgb24 -vsync 0 pipe:


  



  but like that nothing happens at all and Python script never starts.

  



  Any hints ?
Thanks !!

  


• Any advice on streaming av1 with gstreamer to mediamtx and webrtcbin ?

  8 février 2024, par Israel Robotnick

  I have gstreamer 1.22.7 with the RS plugin for av1 support.
I'm trying to stream AV1 rtp to mediamtx using gstreamer, but the bigger goal is that my rtspsrc->webrtcbin pipeline will work with av1 as it works with h264\vp8\vp9.

  


  I have gstreamer 1.22.7 with the RS plugin for av1 support.
I've created a few av1 files with ffmpeg using svtav1 and rav1e encoders :

  


  ffmpeg -i h264.mp4 -an -c:v libsvtav1 -preset 5 -crf 30 -g 60 -svtav1-params tune=0:fast-decode=1 -pix_fmt yuv420p test1.mp4

ffmpeg -i h264.mp4 -an -c:v librav1e -preset 5 -crf 30 -g 60 -rav1e-params speed=5:low_latency=true -pix_fmt yuv420p test2.mp4


  


  ffmpeg does not currently support AV1 streaming to rtp\rtsp, so im using gstreamer to do so :

  


  gst-launch-1.0 filesrc location=test1.mp4 ! qtdemux ! av1parse ! rtspclietsink location=rtsp://127.0.0.1:8554/test1


  


  From what I've read, mediaMTX\chrome\VLC in their latest versions support av1 streaming in webrtc\rtsp,
but there are no examples whatsoever on how to do so.

  


  Gstreamer preroll, playing and recording when publishing. Everything seems to be fine. Same in mediamtx logs.

  


  When I try to connect a client to the rtsp path via VLC\FFplay\gstreamer rtspsrc->webrtcbin pipeline I don't
et any image. (though webrtc internals show packets arrive fine, but VLC\ffmpeg cant connect)

  


  Any ideas what can be wrong ? Anyone have experience with encoding+streaming AV1 with gstreamer rtspclientsink ?
If you have any tips on redirecting it to webrtcbin (what I do is rtspsrc...parsebin ! queue ! rtpav1pay ! webrtcbin, which seems to connect to chrome and create the av1 sdp, but there in no image) I would appreciate them as well ( :

  


• Creating own video server with ffserver/ffmpeg streaming RTSP

  24 août 2018, par Brykyz

  I have created app that plays video when url is provided. It can recieve video via RTSP (already tried to play famous big bunny), but now I want to debug it with my own server. Currently I have downloaded ffserver/ffmpeg and want to create my own video server, but i don’t know how.

  I have already tried

  ffserver &
  
  sudo ffmpeg -r 24 -i "video.mp4" http://localhost:8090/feed1.ffm
  
  ffplay http://localhost:8090/feed1.ffm

  but it doesn’t work. I am trying to achieve same thing that happens when I type to terminal

  ffplay rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov

  (it should play my video), but I want to use private server.

  How can I create server that will stream video via RTSP ?

  Thank you for your help !

  //Edit :

  ffserver.conf

  HttpPort 8090 
  
  RtspPort 5554
  
  HttpBindAddress 0.0.0.0 
  
  MaxClients 1000 
  
  MaxBandwidth 10000 
  
  NoDaemon 
  
  
  
  <feed> 
  
  File /tmp/feed1.ffm 
  
  FileMaxSize 1000M 
  
  </feed> 
  
  
  
  <stream>
  
  Feed feed1.ffm
  
  Format rtp
  
  VideoCodec mpeg4
  
  VideoFrameRate 25
  
  VideoBufferSize 80000
  
  VideoBitRate 100
  
  VideoQMin 1
  
  VideoQMax 5
  
  VideoSize 1920x1080
  
  PreRoll 0
  
  Noaudio
  
  </stream>

  and I am trying to launch it via

  ffserver -d & ffmpeg -re -i "simpsons.mp4" http://localhost:8090/feed1.ffm

  and then

  ffplay "rtsp://localhost:5554/test.mpeg4"

  Output is

  [tcp @ 0x7fb0880079c0] Connection to tcp://localhost:5554?timeout=0 failed: Connection refused
  
  rtsp://localhost:5554/test.mpeg4: Connection refused