[AG-TECH] Video Producer Service fails to start

[Mike Weaver]

Hi all,

I finally had time to start looking at this again.  This problem is in
reference to AG 3.0.2 on Fedora Core 6.  The actual error (detailed below)
is 

VideoProducerService.py", line 279, in Start
    if self.streamDescription.encryptionFlag != 0:
AttributeError: 'int' object has no attribute 'encryptionFlag'

Python seems to be misinterpreting the data type of the streamDescription
object.  Hacks to comment out this check, or surround it with a 'hasattr'
check only cause failures further in the code.

The really annoying thing about this, is that the AudioService.py module
(different machine) has almost identical code and runs fine.  The audio &
video machines use the same motherboard, BIOS, chipsets, etc...  Both are
fresh installs of Fedora Core 6, fully patched with the latest AG3 & 2.4
compatibility RPMs from the UQ repository.  All python packages are
identical, same packages, same versions.

I'm no python guru, but I have a (outdated) software development background
and I just can't understand how this can be.  Same platform, same OS, same
libraries, same versions, same code - different results.

Anyone out there have any ideas?  I'm willing to try other Linux distros,
but we run RHEL on our production servers so I'd like to stay with Fedora
for constancy's sake.

I've attached both the AudioService.log & VideoProducerService.log files for
review & comparison.

Thanks,

Mike

-----Original Message-----
From: Rhys Hawkins [mailto:rhys.hawkins at anu.edu.au] 
Sent: Tuesday, November 14, 2006 17:32
To: Christoph Willing
Cc: weaver at er.doe.gov; AG-TECH list
Subject: Re: [AG-TECH] Video Producer Service fails to start


Hi Chris, Mike,

This looks like the same thing that bit me when testing UQs h263 stuff. 
If the streamDescription is an int, then the VideoProducer service
doesn't stand much of a chance being able to start. It appears to be
a bug that rears its ugly head when you least expect it, ie I've just 
tested this again and now I don't see the same problem ...

It would be interesting to know if this is restricted to Fedora or if
it occurs on other ports.

Cheers,
    Rhys

On Wed, 15 Nov 2006 08:11:12 +1000
Christoph Willing <willing at vislab.uq.edu.au> wrote:

> 
> On 15/11/2006, at 6:16 AM, Mike Weaver wrote:
> []
> >
> > The relevant part of the VideoProducerService.log seems to be:
> >
> > 11/14/06 14:45:05 -1225061488 Toolkit     VideoProducerService.py: 
> > 309 ERROR
> > Exception in VideoProducerService.Start
> > Traceback (most recent call last):
> >   File
> > "/home/micsag/.AccessGrid3/local_services/VideoProducerService/ 
> > VideoProducer
> > Service.py", line 279, in Start
> >     if self.streamDescription.encryptionFlag != 0:
> > AttributeError: 'int' object has no attribute 'encryptionFlag'
> 
> 
> Mike,
> 
> A short term fix is to edit the file .AccessGrid3/local_services/ 
> VideoProducerService/VideoProducerService.py by changing the line:
> 	if self.streamDescription.encryptionFlag != 0:
> to
> 	if hasattr(self.streamDescription, 'encryptionFlag') and  
> self.streamDescription.encryptionFlag != 0:
> 
> 
> 
> chris
> 
> 
> Christoph Willing                       +61 7 3365 8350
> QCIF Access Grid Manager
> University of Queensland
> 
> 
> 
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