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• FFMPEG picture in picture and watermark

  11 décembre 2019, par Jim Jones

  I’m trying to take create a picture in picture effect with 2 videos and add a watermark with 1 command. Here’s what I have so far, it works great, except the watermark is on the picture in picture video, not the main background video. How do I make the watermark on the main video ?

  ffmpeg -y -i pip.mp4 -i main.mp4 -i logo.png -filter_complex \
  
  "[0]scale=iw/4:-1[pip]; \
  
   [pip][2]overlay=10:10[watermark]; \
  
   [1][watermark]overlay=main_w-overlay_w-10:main_h-overlay_h-10" output.mp4

• Color Tracking Drone Code Test

  7 octobre 2017, par AR Drone

  I am trying to follow a GitHub to allow my AR Drone to fly autonomously for some time ; however, I am having a lot of troubles setting up.

  As a follow up to my prior question, I was able to solve

  import cv2
  
  import libardrone.libardrone

  I reinstalled opencv and I realized the documentation was incorrect ; it was supposed to be

  import libardrone.ardrone

  Solving these two problems let me to be able to attempt the track.py given here : https://github.com/JJLewis/ColorTracking-ARDrone2.0-Python.

  Running track.py gives me the follow errors even though I have ffmpeg installed correctly.

  WARNING:root:Connection to ardrone
  
  
  
  Traceback (most recent call last):
  
    File "/Library/Python/2.7/site-packages/track.py", line 180, in <module>
  
      main()
  
    File "/Library/Python/2.7/site-packages/track.py", line 19, in main
  
      drone = libardrone.ARDrone(True, False)
  
    File "/Library/Python/2.7/site-packages/libardrone/ardrone.py", line 108, in __init__
  
      self.network_process = arnetwork.ARDroneNetworkProcess(com_pipe_other, is_ar_drone_2, self)
  
    File "/Library/Python/2.7/site-packages/libardrone/arnetwork.py", line 51, in __init__
  
      self.ar2video = ar2video.ARVideo2(self._drone, drone.debug)
  
    File "/Library/Python/2.7/site-packages/libardrone/ar2video.py", line 37, in __init__
  
      h264 = h264decoder.H264Decoder(self, drone.image_shape)
  
    File "/Library/Python/2.7/site-packages/libardrone/h264decoder.py", line 82, in __init__
  
      raise Exception("You need to install ffmpeg to be able to run ardrone")
  
  Exception: You need to install ffmpeg to be able to run ardrone
  
  >>> Exception in thread Thread-35:
  
  Traceback (most recent call last):
  
    File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 801, in __bootstrap_inner
  
      self.run()
  
    File "/Library/Python/2.7/site-packages/libardrone/arnetwork.py", line 86, in run
  
      video_socket, nav_socket, control_socket = _connect()
  
    File "/Library/Python/2.7/site-packages/libardrone/arnetwork.py", line 75, in _connect
  
      control_socket.connect(('192.168.1.1', ARDRONE_CONTROL_PORT))
  
    File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 228, in meth
  
      return getattr(self._sock,name)(*args)
  
  error: [Errno 60] Operation timed out
  
  </module>

  Entering FFMPEG into my Mac terminal yields the following : which leads me to believe that FFMPEG is installed correctly ; however it is not detected or something.

  ffmpeg version 3.3.4 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with Apple LLVM version 8.1.0 (clang-802.0.42)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma --enable-vda 

  Doing brew info opencv shows a check for FFMPEG for openCV so I am not really sure how I am getting an error for this part of the code.
  As a beginner, I am having difficulties resolving these issues. My specifications are as follows Mac 10.12, Python 2.7.14, and OpenCV 3.3.0_3.

• Handle an invalid extra mpeg2 picture header following a frame-encoded picture.

  1er mars 2013, par Joseph Artsimovich

  Handle an invalid extra mpeg2 picture header following a frame-encoded picture.