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• Delay in displaying a video stream after streaming by libavformat

  15 janvier 2014, par Blue Sky

  I am using libavformat library to stream a video at a network address like udp ://127.0.0.1:1000. I use ffplay to display the received video stream at the network address. However, the video appears few second later (e.g. 5 6 seconds) at ffplay on the same machine. Do you know what is the reason ?

  More info :

  I have written my own streaming application using libavformat. When I stream a 3sec 1080p video at 25fps, ffplay does not show anything. If I repeat streaming the same video once again, this time, ffplay starts displaying the previous streamed video as well as the current video. So, it looks like ffplay waits for a buffer to be filled up by some amount, and then displays the stream. But am I correct ?

• Streaming desktop screen over the internet using ffmpeg

  22 janvier 2014, par user2944822

  I am a newbie in ffmpeg. I am trying to stream my Desktop screen over the internet using ffmpeg. This is the server configuration.

  Port 8090                      # Port to bind the server to
  
  BindAddress 0.0.0.0
  
  MaxHTTPConnections 2000
  
  MaxClients 1000
  
  MaxBandwidth 10000             # Maximum bandwidth per client
  
                             # set this high enough to exceed stream bitrate
  
  CustomLog -
  
  NoDaemon                       # Remove this if you want FFserver to daemonize after start
  
  
  
  <feed>               # This is the input feed where FFmpeg will send
  
     File ./feed1.ffm            # video stream.
  
     FileMaxSize 1G              # Maximum file size for buffering video
  
     ACL allow 127.0.0.1         
  
  </feed>
  
  
  
  <stream>              # Output stream URL definition
  
     Feed feed1.ffm              # Feed from which to receive video
  
     Format webm
  
  
  
     # Audio settings
  
     NoAudio
  
     #AudioCodec vorbis
  
     #AudioBitRate 64             # Audio bitrate
  
  
  
     # Video settings
  
     VideoCodec libvpx
  
     VideoSize 720x576           # Video resolution
  
     VideoFrameRate 25           # Video FPS
  
     AVOptionVideo flags +global_header  # Parameters passed to encoder
  
                                     # (same as ffmpeg command-line parameters)
  
     AVOptionVideo cpu-used 0
  
     AVOptionVideo qmin 10
  
     AVOptionVideo qmax 42
  
     AVOptionVideo quality good
  
     AVOptionAudio flags +global_header
  
     PreRoll 15
  
     StartSendOnKey
  
     VideoBitRate 400            # Video bitrate
  
  </stream>
  
  
  
  <stream>            # Server status URL
  
     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>    # Just an URL redirect for index
  
     # Redirect index.html to the appropriate site
  
     URL http://www.ffmpeg.org/
  
  </redirect>

  Server starts without showing any problem.

  Input stream is as follows :
  ffmpeg -f x11grab -r 25 -s 1366x768 -i :0.0 http://xxx.xxx.xxx.xxx:8090/feed1.ffm

  I get always core dumped. Please help me out or point me to any tutorial which can help me in this context.

  Regards
  Dheeraj

• How to split a mp4 file into multiple .m4s chunks with one init.mp4 file

  29 novembre 2018, par JAVA Coder

  I am trying to split one audio.mp4 into multiple chunks(each of 10 seconds) with file format of .m4s or .mpd and one init.mp4 .

  1>I have successfully made chunks of 10 secs with one m3u8 file by this command-

  ffmpeg -i song.mp3 -c:a aac -b:a 64k -vn -hls_time 10 -hls_list_size 0 abc.m3u8

  2>Tried this command also

  MP4Box -dash 10000 -frag 1000 -rap -segment-name myDash -subsegs-per-sidx 5 -url-template test.mp4

  But not able to make .m4s chunks with one init.mp4.