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• webcam streaming with ffserver, ffmpeg, how to crop image

  4 avril 2013, par user1971455

  I'm trying to stream a webcam using ffserver and ffmpeg. It works well but now I want to crop the image using ffmpeg's crop filter. The problem is that the crop filter has no effect on the streaming video. The command I am using is :

  ffserver -f /etc/ff.conf & ffmpeg -v verbose -r 5  -s 640x480  -f video4linux2 -i /dev/video0  -vf crop=620:400:0:0 http://localhost/webcam.ffm

  My ff.conf contains this :

  Port 80
  
  BindAddress 0.0.0.0
  
  MaxClients 10
  
  MaxBandwidth 50000
  
  NoDaemon
  
  
  
  <feed>
  
  file /tmp/webcam.ffm
  
  FileMaxSize 10M
  
  </feed>
  
  
  
  <stream>
  
  Feed webcam.ffm
  
  Format mpeg
  
  VideoSize hd720 #640x480
  
  VideoFrameRate 10
  
  VideoBitRate 2000
  
  VideoQMin 1
  
  VideoQMax 10
  
  </stream>

• ffmpeg : simple RTMP streaming

  2 avril 2013, par sajad

  I am trying to launch up a rtmp transcoder server using ffmpeg ; that receives udp MPEG-TS streams as input, transcodes it ; and generates an rtmp output to a URL, that can be accessed by users to receive and play the rtmp stream. All these are expected to be performed in a LAN and the output be accessed by all users.

  1) First I don't know where the URL should point to. Is it enought to specify the IP of the system and some optional port ? Is it neccessary that a program should be listening on that port ?

  2) How I can play the stream on the URL ?

  I use a linux ubuntu machine whith IP=10.1.1.229 and I want to transcode multicast stream on this URL : udp://@224.10.1.1:2001.

  here is the command used to transcode input stream and generate rtmp url "rtmp ://10.1.1.229:2020".

  ffmpeg -y -f mpegts -i "udp://@224.10.1.1:2001" -re -vcodec libx264 -maxrate 700k -r 25 -s 640x360 -deinterlace -acodec libfaac -ab 64k -ac 1 -ar 44100 -f flv "rtmp://10.1.1.229:2020"

  and here is the command by which I am trying to play rtmp stream :

  ffplay rtmp://10.1.1.229:2020

  Any guidance would be helpfull. Thank you.

• How to stream and play video using ffplay without buffering

  3 novembre 2014, par grzebyk

  I want to stream a live webcam video and display it on android device with the lowest latency possible. I am streaming video from a computer over rtsp protocol and I am able to watch the stream with 150ms latency on the second computer using ffplay -fflags nobuffer rtsp://xxx.xxx.xxx.xxx:port/test.sdp command.

  So far I have successfully compiled ffmpeg4android library. Unfortunately this library uses NDK which I am not familiar with. All I want to do is to be able to invoke the same command and display the video on the android SurfaceView.

  How can I call for such command ?