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• frame_thread_encoder : make 'exit' member atomic.

  11 septembre 2017, par Ronald S. Bultje

  frame_thread_encoder : make 'exit' member atomic.
  Should fix the following tsan warning :
  WARNING : ThreadSanitizer : data race (pid=19806)
  
    Read of size 4 at 0x7b84000012f0 by thread T9 :
  
      #0 worker src/libavcodec/frame_thread_encoder.c:66 (ffmpeg+0x0000007f349e)
  
  [..]
  
    Previous write of size 4 at 0x7b84000012f0 by main thread (mutexes : write M1395) :
  
      #0 ff_frame_thread_encoder_free src/libavcodec/frame_thread_encoder.c:239 (ffmpeg+0x0000007f379e)
  
  [..]
  

  • [DH] libavcodec/frame_thread_encoder.c

• Run ffmpeg as window service

  7 juin 2018, par Brad Reiter

  My setup is like this :

  It contains components :

  • Web Cam : which send out the RTP packets when i get a stream request
  • Agent server : Which receives the stream from the Webcam and forwards
    the same to ffmpeg server.
  • ffmpeg server : this where i need to run the ffmpeg as window service,
    receives the rtp stream sent by agent server and create a ts file.

  What have i done is :

  I have setup the ffmpeg in one of my dev environment using this link :

  https://video.stackexchange.com/questions/20495/how-do-i-set-up-and-use-ffmpeg-in-windows

  My problems :

  • How to make ffmpeg run as daemon.?
  • How can i make ffmpeg aware that new stream is coming from agent
    server and start creating a ts file.?
  • Is there a way in ffmpeg that i reserve ports for ffmpeg and make it
    listen to all the ports for eg : reserve 2000 - 3000 ports and listen
    to them as soon as rtp stream arrives, convert to ts stream.

  Regards

• rtsp stream transcode with ffserver/ffmpeg

  30 juin 2018, par Torbjørn

  I’m having a unifi dome webcam. Connected thrue a USG Pro4. I’m sending a rtsp live stream at 1024x576px. Until now I have been using ffserver to transcode the stream into a new mpjpeg stream that I can show in a html file.
  But after I updated ffserver to the newest version. This does not work.

  Using debian.

  ffserver.conf file :

      HTTPPort 8090
  
      # bind to all IPs aliased or not
  
      HTTPBindAddress 0.0.0.0
  
      # max number of simultaneous clients
  
      MaxClients 1000
  
      # max bandwidth per-client (kb/s)
  
      MaxBandwidth 100000
  
      # Suppress that if you want to launch ffserver as a daemon.
  
      # NoDaemon
  
      NoDefaults
      File /tmp/feed1.ffm
  
      FileMaxSize 500M
      Feed feed1.ffm
  
      Format mpjpeg
  
      VideoCodec mjpeg
  
      VideoFrameRate 1
  
      #VideoBufferSize 80000
  
      VideoQMin 1
  
      VideoQMax 5
  
      VideoSize 1024x576
  
      PreRoll 0
  
      Noaudio
  

  ffmpeg startup :

  `ffmpeg -rtsp_transport tcp -re -i "rtsp ://user:pass@193.213.XXX.XXX:554/s2" -b:v 1016k http://localhost:8090/feed1.ffm`

  I’ve tried with different startups after some google search. But I can get 1-10 fps before it shuts down.
  Sometimes I get :

  `rtsp ://user:pass@193.213.XXX.XXX:554/s2 : Invalid data found when processing input`

      Input #0, rtsp, from ’rtsp ://user:pass@193.213.XXX.XXX:554/s2’ :
  
        Metadata :
  
          title : s2
  
        Duration : N/A, start : 0.000000, bitrate : N/A
  
          Stream #0:0 : Audio : aac (LC), 11025 Hz, mono, fltp
  
          Stream #0:1 : Video : h264 (Main), yuvj420p(pc, bt709, progressive), 1024x576 [SAR 189:190 DAR 168:95], 1 fps, 1 tbr, 90k tbn, 2 tbc
  
      Output #0, ffm, to ’http://localhost:8090/feed1.ffm’ :
  
        Metadata :
  
          title : s2
  
          creation_time : now
  
          encoder : Lavf57.56.101
  
          Stream #0:0 : Video : mjpeg, yuvj420p(pc), 1024x576 [SAR 189:190 DAR 168:95], q=1-5, 1016 kb/s, 1 fps, 1000k tbn, 1 tbc
  
          Metadata :
  
            encoder : Lavc57.64.101 mjpeg
  
          Side data :
  
            cpb : bitrate max/min/avg : 0/0/1016000 buffer size : 0 vbv_delay : -1
  
      Stream mapping :
  
        Stream #0:1 -> #0:0 (h264 (native) -> mjpeg (native))
  
      Press [q] to stop, [?] for help
  
      frame=    4 fps=0.7 q=2.1 Lsize=     564kB time=00:00:03.00 bitrate=1540.1kbits/s dup=1 drop=0 speed=0.54x
  
      video:558kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : 1.089245%
  

  Is there an easy way to get this working, or is there a much better way of doing it ?
  What i want out of this is an live web cam stream in an html site that works on all platforms without any plugins on clients end.