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• Crop being ignored when added with resize filter

  18 février 2020, par BN83

  Using the following :

  $video -> filters()
  
      -> resize(new FFMpeg\Coordinate\Dimension(480, 854))
  
      -> crop(new FFMpeg\Coordinate\Point("t*100", 0, true), new FFMpeg\Coordinate\Dimension(480, 640))
  
      ->watermark('watermark.png', array(
  
              'position' => 'relative',
  
              'bottom' => 10,
  
              'right' => 10,
  
      ));

  I get a resized video but doesn’t crop the to the proportions set. Resulting video is 480x854, with a watermark but not cropped.

  If I use :

  $video -> filters()
  
      -> crop(new FFMpeg\Coordinate\Point("t*100", 0, true), new FFMpeg\Coordinate\Dimension(480, 640))
  
      ));

  It crops the image to the right size, but only a portion of the video, as you’d expect.

• Why can I run this command from the terminal but I get an error when my python runs it from the terminal for me ?

  9 mai 2019, par mu234

  I’m trying to write a python script that basically captures webcam videos from the terminal. When I put the command in a string and use subprocess.call(script, True), I get an error, but when I literally copy/paste the same command to the terminal it works fine.

  This is my python :

  import subprocess
  
  import os
  
  if (os.path.isdir("Videos/Webcam/temp") is False):
  
      dirmake = 'mkdir Videos/Webcam/temp'
  
      subprocess.call(dirmake, True)
  
  cmd = 'ffmpeg -f v4l2 -i /dev/video0 -t 00:00:10 video.webm'
  
  subprocess.call(cmd, True)

  and this is the error

  `FileNotFoundError: [Errno 2] No such file or directory: 'ffmpeg -f v4l2 -i /dev/video0 -t 00:00:10 video.webm': 'ffmpeg -f v4l2 -i /dev/video0 -t 00:00:10 video.webm'`

  If I just run ffmpeg -f v4l2 -i /dev/video0 -t 00:00:10 video.webm from the terminal it works fine.

  Originally the video was supposed to go in Videos/Webcam/temp but I took it out to see if the error had something to do with where I was putting the video. I’m using Ubuntu 18.04.2 LTS if that makes a difference.

• How to configure rtsp relay from internal to external network ?

  27 mars 2020, par Magi

  How to correctly compose a command for relaying a video stream to rtsp from an ip camera from an internal network through a server with vlc.

  Ip-camera -> ubuntu server -> client with vlc

  Url video-stream from ip-camera rtsp ://admin:admin123@10.148.21.190:554/cam/realmonitor ?channel=1&subtype=0&unicast=true&proto=Onvif

  Command on server :

  cvlc -d rtsp://admin:admin@10.148.21.190:554/cam/realmonitor?channel=1&subtype=0&unicast=true&proto=Onvif --loop --repeat --sout-keep "#rtp{sdp=rtsp://xxx.xxx.xxx.xxx:8080/test.sdp}";

  xxx.xxx.xxx.xxx - external server ip.

  On vlc enter rtsp ://xxx.xxx.xxx.xxx:8080/test.sdp - broadcast is not going. There are no errors, the log is empty.

  With ffmpeg :

  ffmpeg -i 'rtsp://onvif:admin2017@10.148.21.190:554/cam/realmonitor?channel=1&subtype=0&unicast=true&proto=Onvif' -f rtsp -rtsp_transport tcp rtsp://xxx.xxx.xxx.xxx;
  
  Input #0, rtsp, from 'rtsp://onvif:admin2017@10.148.21.190:554/cam/realmonitor?channel=1&subtype=0&unicast=true&proto=Onvif':
  
    Metadata:
  
      title           : Media Server
  
    Duration: N/A, start: 0.320000, bitrate: N/A
  
      Stream #0:0: Video: h264 (High), yuvj420p(pc, bt709, progressive), 1280x720, 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0:1: Data: none
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))
  
  Press [q] to stop, [?] for help
  
  [swscaler @ 0x55ae26500a80] deprecated pixel format used, make sure you did set range correctly
  
  [tcp @ 0x55ae26aa3ec0] Connection to tcp://xxx.xxx.xxx.xxx:554?timeout=0 failed: Connection refused
  
  Could not write header for output file #0 (incorrect codec parameters ?): Connection refused
  
  Error initializing output stream 0:0 --
  
  Conversion failed!

  In /etc/ffserver.conf ACL allow localhost xxx.xxx.xxx.xxx