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• How to stream to ffserver from android

  8 mars 2013, par kev

  I need to stream from an android camera/ file to a remote ffserver which will broadcast my video. I can do this on the desktop in ubuntu by issuing a command like :

  ffmpeg -f video4linux2 -s 640x480 -r 25 -i /dev/video0 http://192.168.0.20:8090/cam1.ffm

  or stream a file like this :

  ffmpeg -i /home/kev/share/movie.mp4 http://192.168.0.20:8090/cam1.ffm

  So basically i want to be able to do the above from android. After several searches this is what i've done so far - i came across this link http://bambuser.com/opensource from which i downloaded the ffmpeg source and built it. The build outputs several things :
  1. shared libs [libavcodec, libavcore, libavdevice, libavfilter,libavformat,libavutil,libswscale]
  2. executables [ffmpeg,ffprobe]

  Not sure how to plug my functionality with these resources this is what i've tried so far :
  1. loaded the libs in my Activity using System.loadLibrary() then copied the ffmpeg executable to the assets folder which at runtime i copied to my application's "files" directory i then set permissions for the executable using Runtime.getRuntime().exec(). then the last step was to execute it in java with the following statement :

  Runtime.getRuntime().exec("ffmpeg -i file:///android_asset/movie.mp4http://<server>:8090/cam1.ffm");
  
  </server>

  2. copied ffmpeg.c,the shared libraries and the "include" folder that was generated by the build to my jni folder and added a jni function that wraps around the main() function in ffmpeg.c. With this approach i've found myself having to copy several header files from the ffmpeg source for the ndk-build to succeed and i highly doubt if this is the way to go.

  The above two approaches havnt worked for me, i'm not sure where i'm going wrong, so any help on how to do a simple ffmpeg streaming like an mp4 file from android would be highly appreciated.

• How to grab voice and video in ffmpeg/mplayer/mencoder ? [closed]

  4 février 2013, par Kill Kill

  My target is to grab voice and video via webcamera.
  There are three ways to do :

  1.ffmpeg

  ffmpeg -f oss -i /dev/dsp -f video4linux2 -r 25 -b 500000 -s 320x240 -i /dev/video0 out.mpg  
  
  WARNING: gnome-keyring:: couldn't connect to: /home/debian/.cache/keyring-4Hzs4r/pkcs11: No such file or directory  
  
  ffmpeg version 0.8.5-6:0.8.5-1, Copyright (c) 2000-2012 the Libav developers  
  
  built on Jan 13 2013 16:02:15 with gcc 4.7.2  
  
  *** THIS PROGRAM IS DEPRECATED ***  
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.  
  
  [oss @ 0x9d63c60] /dev/dsp: No such file or directory  
  
  /dev/dsp: Input/output error

  in my computer how to revise it ?

  2.mplayer :

  mplayer tv:// -tv driver=v4l2:input=0:width=640:height=480:fps=25 -vo x11  

  I can see the video when the command run, how can I save the output into a file and grab the voice ?

  3.mencoder :

  mencoder tv:// -tv driver=v4l2:width=800:height=600:device=/dev/video0:fps=30:outfmt=yuy2:forceaudio:alsa:adevice=hw.2,0 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1800 -ffourcc xvid -oac mp3lame -lameopts cbr=128 -o output.avi  
  
  
  
  MEncoder svn r34540 (Debian), built with gcc-4.7 (C) 2000-2012 MPlayer Team  
  
  success: format: 9 data: 0x0 - 0x0  
  
  TV file format detected.  
  
  Selected driver: v4l2  
  
  name: Video 4 Linux 2 input  
  
  author: Martin Olschewski   
  
  comment: first try, more to come   
  
  v4l2: your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead.  
  
  Selected device: PC Camera  
  
  Capabilities: video capture read/write streaming  
  
  supported norms:  
  
  inputs: 0 = zc3xx;  
  
  Current input: 0  
  
  Current format: unknown (0x4745504a)  
  
  tv.c: norm_from_string(pal): Bogus norm parameter, setting default.  
  
  v4l2: ioctl enum norm failed: Inappropriate ioctl for device  
  
  Error: Cannot set norm!  
  
  Selected input hasn't got a tuner!  
  
  ALSA lib pcm_hw.c:1401:(_snd_pcm_hw_open) Invalid value for card  
  
  Error opening audio: No such file or directory  
  
  ALSA lib pcm_hw.c:1401:(_snd_pcm_hw_open) Invalid value for card  
  
  Error opening audio: No such file or directory  
  
  ALSA lib pcm_hw.c:1401:(_snd_pcm_hw_open) Invalid value for card  
  
  Error opening audio: No such file or directory  
  
  v4l2: ioctl set mute failed: Invalid argument  
  
  v4l2: 0 frames successfully processed, 0 frames dropped.  
  
  ============ Sorry, this file format is not recognized/supported =============  
  
  === If this file is an AVI, ASF or MPEG stream, please contact the author! ===  
  
  Cannot open demuxer.  
  
  
  
  Exiting...  

• can i stream "webpage" from ffmpeg ?

  23 janvier 2017, par John Slovikara

  Hello everybody..

  just need to know if i can stream "webpage-html" via FFmpeg ,
  i have script in my server , i used it to stream live poll into facebook, just need to know if i can stream any html or web page.

  this is my stream code :

  ffmpeg \
  
  -re -y \
  
  -loop 1 \
  
  -f image2 \
  
  -i images/stream.jpg \
  
  -i /home/sounds/silence-loop.wav \
  
  -acodec libfdk_aac \
  
  -ac 1 \
  
  -ar 44100 \
  
  -b:a 128k \
  
  -vcodec libx264 \
  
  -pix_fmt yuv420p \
  
  -vf scale=640:480 \
  
  -r 30 \
  
  -g 60 \
  
  -f flv \
  
  "rtmp://rtmp-api.facebook.com:80/rtmp/1270000000015267?ds=1&s_l=1&a=ATh1XXXXXXXXXXXuX"