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• want to stream mobile camera using ffserver and ffmpeg

  6 janvier 2017, par Vinay Pandya

  First i will tell you my requirement than i will tell you what i have done.

  i am noob in media streaming i am learning and i am very confused about it.

  basically i want to do following thing

  1 : mobile app will stream video on server through URL (which is on my laptop)
  2 : My laptop should run ffserver/ffmpeg which store video stream which is coming from mobile app and allow other client to watch it (here i am talking about VLC as client).

  so this is my requirement.

  i ham running ffserver on my laptop

  my ff server config is like :

  HTTPPort 8090
  
  HTTPBindAddress 0.0.0.0
  
  
  
  RTSPPort 8091
  
  RTSPBindAddress 0.0.0.0
  
  
  
  
  
  MaxHTTPConnections 2000
  
  MaxClients 1000
  
  MaxBandwidth 1000
  
  CustomLog -
  
  
  
  #NoDaemon
  
  
  
  <feed>
  
      File /tmp/feed1.ffm
  
      FileMaxSize 200K
  
      ACL allow 127.0.0.1
  
  </feed>
  
  
  
  # if you want to use mpegts format instead of flv
  
  # then change "live.flv" to "live.ts"
  
  # and also change "Format flv" to "Format mpegts"
  
  <stream>
  
      Format flv
  
      Feed feed1.ffm
  
  
  
      VideoCodec libx264
  
      VideoFrameRate 30
  
      VideoBitRate 512
  
      VideoSize 320x240
  
      AVOptionVideo crf 23
  
      AVOptionVideo preset medium
  
      # for more info on crf/preset options, type: x264 --help
  
      AVOptionVideo flags +global_header
  
  
  
      AudioCodec aac
  
      Strict -2
  
      AudioBitRate 128
  
      AudioChannels 2
  
      AudioSampleRate 44100
  
      AVOptionAudio flags +global_header
  
  </stream>
  
  
  
  ##################################################################
  
  # Special streams
  
  ##################################################################
  
  <stream>
  
      Format status
  
      # Only allow local people to get the status
  
      ACL allow localhost
  
      ACL allow 192.168.0.0 192.168.255.255
  
  </stream>
  
  
  
  # Redirect index.html to the appropriate site
  
  <redirect>
  
      URL http://www.ffmpeg.org/
  
  </redirect>
  
  ##################################################################

  than i am adding following url to my mobile app to stream video.
  rtsp ://:8091/feed1.ffm
  my mobile app start streaming my mobile developer team said that.
  but i am not getting any log on ffserver, when i am stooping streaming the TEARDOWN request is comming

  [TEARDOWN] "rtsp://192.168.1.57:8091/feed1.ffm RTSP/1.0" 200 7034

  i have done this is so far, i dont know how to use ffmpeg with live streaming. please tell me some example for that.

  i am not able to watch that live stream on VLC client. also tell me what URL should i enter in VLC for streaming i have tried almost every url combination.

  and one more thing i want to do it with RTSP protocol.

  i think this info will help you to understand my requirement.

• How to run ffmpeg command from the client side ?

  12 janvier 2017, par Debraj Biswas

  I am trying to make an online examination portal. When students start the exam, their webcam will start automatically and record the stream live and store in the server. Invigilators will either watch the students live or they can watch the saved live streams later.

  After many research on various technologies I came across this link. It uses Node JS with websockets and ffmpeg. I ran the ffmpeg command and it streamed the live video successfully.

  But the problem is, in order to live stream, the students have to have ffmpeg installed in their system and they should run the command directly from the terminal. So how can I change this ? The students will live stream from their browser, because this is a web portal. If we put this command in a PHP script, then the command will run at the server side. But client side command should run in this case. How can I run command from client side ?

  Any suggestions will be helpful.

• Streaming from Icecast to Facebook Live with ffmpeg on Ubuntu 16.04

  14 janvier 2017, par Matthieu

  I have a webradio streamed by Liquidsoap+Icecast on a DigitalOcean droplet (Ubuntu 16.04), and I want to combine this audio stream with a simple jpeg image with ffmpeg, transform it to a video stream and send it to Facebook live.

  Facebook Live specifications :

  Video Format :

  We accept video in maximum 720p (1280 x 720) resolution, at 30 frames
  per second. (or 1 key frame every 2 seconds). You must send an I-frame
  (keyframe) at least once every two seconds throughout the stream..
  Recommended max bit rate is 4000 Kbps. Titles must be less than 255
  characters otherwise the stream will fail. The Live API accepts H264
  encoded video and AAC encoded audio only.

  Video Length :

  240 minute maximum length, with the exception of continuous live (see
  above). 240 minute maximum length for preview streams (either through
  Live dialog or publisher tools). After 240 minutes, a new stream key
  must be generated.

  Advanced Settings :

  Pixel Aspect Ratio : Square. Frame Types : Progressive Scan. Audio
  Sample Rate : 44.1 KHz. Audio Bitrate : 128 Kbps stereo. Bitrate
  Encoding : CBR.

  And the ffmpeg command I tried :

  ffmpeg -loop 1 -i radio-background.jpg -thread_queue_size 20480 -i http://localhost:8000/radio -framerate 30 -r 30 -acodec aac -strict -2 -c:v libx264 -strict experimental -b:a 128k -pix_fmt yuvj444p -x264-params keyint=60 -b:v 256k -minrate 128k -maxrate 512k -bufsize 768k -f flv 'rtmp://rtmp-api.facebook.com:80/rtmp/'

  This is actually working, as Facebook receives the live video and allows me to publish it. But I can’t figured out why there is a lag almost every 2 or 3 seconds. I asked different people to watch the test video, and everyone gets the same problem : every 2 or 3 seconds the playing "freezes" for half a second and seems to load the video, I even can see the loading icon spinning on the screen.

  I tried different combinations of values for the following options : -thread_queue_size / -b:v / -minrate / -maxrate / -bufsize. Nothing seems to produce any change.

  Video streaming is new for me, I’m not really confortable with the options listed before, so I think I’m missing something here...

  Also, note that the icecast audio stream perfectly works, and according to DigitalOcean graphs, the server is not overloaded. So I think my ffmpeg command is wrong.

  What ffmpeg parameters would be working for that case ?