segmentation fault

[rainyyun]

The compilation seems fine, even though I need to install some missing libraries.. (OS: ubuntu 11.10)
when I run the ./CameraCalibrator I got the following:

Welcome to CameraCalibrator

---

Parallel tracking and mapping for Small AR workspaces
Copyright (C) Isis Innovation Limited 2008

Parsing calibrator_settings.cfg ....
VideoSource_Linux: Opening video source...

VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
... got video source.
Segmentation fault

Then I changed the video source to Gstreamer, no error...but nothings happens, no camera preview window etc... only printed this:

Parsing calibrator_settings.cfg ....

? GV3::Register: string GStreamerVideoFilename undefined. Defaults to "example.avi"
gstreamer pipeline:
filesrc location="example.avi" ! decodebin ! tee ! ffmpegcolorspace ! videoscale ! video/x-raw-rgb,width=640,height=480 ! queue ! appsink name=rgbvideo max-buffers=2 drop=false tee0. ! queue ! ffmpegcolorspace ! videoscale ! video/x-raw-gray,width=640,height=480 ! appsink name=grayvideo max-buffers=2 drop=false

Hope you have an idea about what is wrong....

[hustcalm]

Hi,

I wonder if you have figured out what is the root cause for this problem.

I got Segmentation Fault too on a Fedora 20 machine, after seeing the PTAM FAQ, I suspect that we may use the wrong display card and driver combo.

As George Klein suggests in README.txt, that it works fine on a Nvidia card.

However, I think the root cause is that the video source class can't handle the colour space coming from the webcam, thus a hack to the source code may solve the problem and I'm working on it.