Path: csiph.com!usenet.pasdenom.info!news.albasani.net!newsfeed.freenet.ag!news2.euro.net!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path: <mail@timgolden.me.uk>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.011
X-Spam-Evidence: '*H*': 0.98; '*S*': 0.00; 'exits': 0.09; 'cc:addr :python-list': 0.11; 'python': 0.11; 'from:addr:timgolden.me.uk': 0.16; 'from:name:tim golden': 0.16; 'it;': 0.16; 'maintainers': 0.16; 'message-id:@timgolden.me.uk': 0.16; 'received:74.55.86': 0.16; 'received:74.55.86.74': 0.16; 'received:smtp.webfaction.com': 0.16; 'received:webfaction.com': 0.16; 'subject:access': 0.16; 'tjg': 0.16; '(you': 0.16; 'exception': 0.16; 'prevent': 0.16; 'fix': 0.17; 'wrote:': 0.18; 'module': 0.19; 'cc:addr:python.org': 0.22; 'header:User-Agent:1': 0.23; 'received:192.168.100': 0.24; 'cc:2**0': 0.24; 'cc:no real name:2**0': 0.24; 'extension': 0.26; 'header:In-Reply-To:1': 0.27; "i'm": 0.30; 'code': 0.31; 'getting': 0.31; 'that.': 0.31; 'open': 0.33; 'running': 0.33; 'case,': 0.35; 'but': 0.35; 'there': 0.35; 'too': 0.37; 'project': 0.37; 'window': 0.38; 'rather': 0.38; 'how': 0.40; 'skip:u 10': 0.60; 'most': 0.60; "you're": 0.61; 'email addr:gmail.com': 0.63; 'offering': 0.63; 'taking': 0.65; 'minutes': 0.67; 'from:addr:mail': 0.83; 'kicking': 0.84; 'to:none': 0.92
Date: Wed, 03 Jul 2013 14:38:46 +0100
From: Tim Golden <mail@timgolden.me.uk>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130307 Thunderbird/17.0.4
MIME-Version: 1.0
CC: python-list@python.org
Subject: Re: python.exe crash if opencv tries to access busy webcam
References: <aa2fde6a-ded2-4817-ad57-77efe3149361@googlegroups.com>
In-Reply-To: <aa2fde6a-ded2-4817-ad57-77efe3149361@googlegroups.com>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <http://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.4165.1372858730.3114.python-list@python.org>
Lines: 20
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1372858730 news.xs4all.nl 15943 [2001:888:2000:d::a6]:47044
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:49733

On 03/07/2013 14:25, ifelsetrue@gmail.com wrote:
> Hello,
> 
> 
> I have a while loop taking images every 5 minutes from webcam.
> Unfortunately, if the camera is busy, python.exe crashes and there is
> no exception to catch. Is there a way to check if camera is busy to
> avoid the crash?

If python.exe crashes -- ie exits completely without a traceback, then
it's most likely a flaw in the extension module which is capturing the
image. If that's the case, there's nothing you can do in Python code to
prevent it; you need to work with the project maintainers to fix that.

If you're getting a traceback but the console window is then closing too
fast for you to see it, then try running the code from an open console
window rather than double-clicking on it. (You don't say how you're
kicking the code off so I'm offering this just in case)

TJG