FYP – Pedestrian Detection – Test 2

The latest version of my final year project, almost complete. It’s designed to be a pedestrian detection system used in reversing cameras on cars. Possibly more information to come, see here – projects/finalyearproject/

How To: Fix “No accelerated colorspace conversion found from yuv420p to bgr24.” | OpenCV-2.2.0 & Ubuntu 10.10

[swscaler @ 0xbf2130]No accelerated colorspace conversion found from yuv420p to bgr24.

This problem is basically an issue converting YUV to RGB using ffmpeg, in order for it to work ffmpeg needs to be recompiled with x264. To get around it use the following to recompile ffmpeg and OpenCV 2.1/2.2:

Follow steps 1-to-4 of FakeOutdoorsman’s […]

Yet Another OpenCV/Karmic error – symbol lookup error: /usr/local/lib/libhighgui.so.4

symbol lookup error: /usr/local/lib/libhighgui.so.4: undefined symbol: av_free_packet

To fix it simply make sure /usr/local/lib is in your library path by using the following command:

export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH

HowTo: Install OpenCV in Ubuntu Karmic (9.10)

Heres how I got OpenCV installed:

First install some needed packages

sudo apt-get install build-essential libgtk2.0-dev

Now you need to grab FFmpeg for the install to work

svn checkout svn://svn.ffmpeg.org/ffmpeg/trunk ffmpeg

The svn didn’t work for me, probably something to do with the proxy I’m under at Uni so I had to grab […]

Problems Installing OpenCV in Ubuntu Karmic (9.10)


I now have it working and wrote a guide of how I got it to work –



I found a great guide on getting OpenCV to install on Ubuntu Karmic (9.10) –http://ivkin.net/2009/11/installing-opencv-2-0-on-ubuntu-9-10-karmic-koala/

Most the comments show the guide works however I have a couple of problems:

Firstly when reloading the […]