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• streaming automatically (on boot) using init.d scripts

  15 juillet 2014, par Aldo Daniel

  I am using Hackberry A10 with a Linaro 3.0.101 distro.
  I am trying to run ffserver and ffmpeg to stream audio and video at the same time. From terminal, these are possible. But now I want to make them run at the start of my device’s boot.

  The script contains :

  case "$1" in

  start)

  cd /home/linaro/bin/

  ./ffserver -f /home/linaro/Desktop/mpeg.conf &

  ./ffmpeg [ code ] &

   ; ;

  esac

  exit 0

  After that I type the following commands :

  chmod 755 [scriptname]

  update-rc.d [scriptname] defaults

  After I reboot the device, nothing happens. The camera light does not turn on. But when I try to run ffserver with the same configuration, it does not allow me, nor does it tell me that there is an error.

  Can anyone help me with this problem ? Thanks in advance !

• Solution for VB6 to broadcast Webcam

  11 juillet 2014, par vantrung -cuncon

  Sorry, I know VB6 is decades ago, but I’m in a situation that I have to use VB6 to deliver live webcam stream beetween 2 PC in Server - Client Model program. Vb6-code holds the connection then I have no choice but to transfer all data via that connection.

  I’ve tried weeks for this, uncountable approaches but went to nowhere.
  My efforts focused on 3 major approaches :

  1/ Use ffmpeg to record live webcam as ".avi" file on hard disk, transfer parts of file to other end & play it. But I’ve stucked with a media-player that can play a "being written" avi file.

  Windows Media Player control told me "file already in use..." & VLC Plugin can’t even be added to VB6 (axvlc.dll).

  2/ Use ffmpeg to save live webcam as avi file, transfer each bit of that file to the other end, then in other end, extract 24 images / second from the avi to display continously in a picture box.
  This approach is ok except that my hard disk get fulled of images in a time of wink and my program get very slow before hanging.

  3/ Use ffmpeg to stream the live webcam to a rtp-port like this :

  ffmpeg -f dshow -i video="Lenovo EasyCamera" -vcodec mpeg2video -pix_fmt yuv422p -f rtp -an rtp://224.1.2.3:8191

  I’ve successfully watch the stream in VLC, but VLC(axvlc.dll) refused to be integrated into ancient VB6. And more important, I don’t know how to redirect/reroute the rtp stream to other PC with VB6.

  Any one please light me up ? (Any 3rd party component is welcomed)

• Get all bytes of stream from webcam after being compressed by codec with ffmpeg ?

  26 octobre 2015, par vantrung -cuncon

  I need to capture every single byte of the video stream from webcam -after using commandline-ffmpeg to compress it with codec.

  So can you please light me up with somewhat the ffmpeg commandline look like and the strategy to get the output stream into my program written by VB6 or VB.net ? (I need to manipulate with every single byte !) Highly appreciate any suggestion.

  ---

  Update : I wonder if it’s possible to save the output as "avi" file on hard disk and at the same time use my program to read content of the saving file. Can I playback the "part of avi file" that I retrieve while the file is being saved (appended) ? Is there any better file format for writting & reading (recording & playing) at the same time other than "avi" ?

  Or any better/faster solution ?