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• Broadcast Unity camera to web

  19 juillet 2019, par Nick

  I want to do a test, where I can Live stream the Camera view from a Unity project, to the web. If I understand correctly, I’ll need to use FFMpeg with pipe out, from Unity ? and then then somehow read it from NodeJS and serve/stream it to the web ?? I’m not really sure how to even approach it.

  Any help would be really appreciated.

  Nick

  PS : Assume I’m a total noob in your suggestions please ! hahah

  Edit : I’m total noob when it comes to FFmpeg and which components that how it is expected to be connected. Like, "you need to make unity to do that, and then take that output and blah blah blah", if that makes sense

• Bug while recording Axis camera stream with FFMPEG

  27 février 2015, par Mathieu Rodic

  I am using FFMPEG to record the video stream (h264 / AAC in MP4) provided by an AXIS camera (P1346).

  I need to make recordings at specific times. To achieve this, I use a PHP script which is executed every minute (with cron), checks in the database whether a recording should be started or not.

  To record the stream, I use proc_open with the following command line :

  /usr/local/bin/ffmpeg -i 'rtsp://192.168.0.103:554/axis-media/media.amp?udp&buffer_size=65535' -vcodec copy -acodec copy -t 3600 -y '/path/to/video/folder/file.mp4'

  Problem is, it works in most cases, but the recording fails every now and then. Have anyone ever tried to record AXIS streams in command line, and faced bugs while doing it ?

  Thank you in advance.

  Regards,

  Mathieu

  N.B. : I have encountered the same difficulties using VLC.

  EDIT : Network errors can be a good explanation on why the recordings sometimes suddenly interrupt ; however, I still don’t understand why the whole video file is corrupted after that.

• ffmpeg starts too slow when using ip camera (the same as using OpenCV)

  15 mars 2015, par Turtle

  Here is my code :

  ffmpeg -i http://192.168.0.101:8889/video?dummy=param.mjpeg out.mjpg

  When I run this command, it will immediately print below :

  ffmpeg version N-70223-g7296716 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      54. 19.100 / 54. 19.100
  
    libavcodec     56. 26.100 / 56. 26.100
  
    libavformat    56. 23.105 / 56. 23.105
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.101 /  5. 11.101
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100

  However, it takes almost twenty seconds before showing next line, and it prints this warning :

  [mjpeg @ 0000000002c4fec0] Format mjpeg detected only with low score of 25, misdetection possible!

  Then it prints this :

  Input #0, mjpeg, from 'http://192.168.0.101:8889/video?dummy=param.mjpeg':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 640x480 [SAR 1:1 DAR 4:3], 25 tbr, 1200k tbn, 25 tbc
  
  Output #0, mjpeg, to 'a.mjpg':
  
    Metadata:
  
      encoder         : Lavf56.23.105
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc), 640x480 [SAR 1:1 DAR 4:3], q=2-31,
  
  200 kb/s, 25 fps, 25 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc56.26.100 mjpeg
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> mjpeg (native))
  
  Press [q] to stop, [?] for help
  
  frame=  195 fps=0.0 q=24.8 size=    1022kB time=00:00:07.80 bitrate=1073.6kbits/
  
  frame=  199 fps=185 q=24.8 size=    1043kB time=00:00:07.96 bitrate=1073.6kbits/
  
  frame=  203 fps=125 q=24.8 size=    1064kB time=00:00:08.12 bitrate=1073.6kbits/

  What’s worse, when I am using OpenCV, the open of the VideoCapture also takes the same long time !

  #include "opencv2/opencv.hpp"
  
  #include <iostream>
  
  using namespace std;
  
  using namespace cv;
  
  
  
  int main(){
  
      cout&lt;&lt;"Start"&lt;/192.168.0.101:8889/video?dummy=param.mjpg");
  
      cout&lt;&lt;"End"&lt;code></iostream>

  20s after printing "start", it prints "end".

  I am using ffmpeg on win7 64 bit downloaded from here.

  Any idea will be appreciated !