-----Original Message-----
> From: Even Rouault [mailto:[email protected]]
>
> On which OS did you run the above test ? On Linux (and provided that
> GDAL_API_PROXY_SERVER is not set to YES or gdalserver) , I get JP2OpenJPEG on
> both cases. However on Windows, I would get the same result as you.
>
Yes, it was Windows and no GDAL_API_PROXY_SERVER set.
> Not sure to have completely followed you on this.
> My understanding is that you would do :
> - open the file in API_PROXY mode
> - if that works (ds != None and possibly attempting to read 1 pixel since
> crashes also sometimes occur in I/O operations), use the dataset, or if you
> want to avoid client/server roundtrips, open it again in standard mode (so
> with JP2ECW)
> - if that fails, deregister JP2ECW and open it as usual in standard mode (with
> JP2OpenJPEG) and re-register JP2ECW just after having opened the file, for the
> next files
>
> I'm confident that you can do that with the current state of code.
>
Yes, it was an I/O operation that caused the crash. I've also had previous
problems with the JP2MrSID driver with other datasets so was hoping to do
something generic like the following snippet. The idea was to gracefully handle
JP2s that might crash more than one driver and therefore the entire gdal
process if opened/used in standard mode as you suggest. Admittedly it's a bit
of a corner case...
drivers=filter(None,[gdal.GetDriverByName(d) for d in
['JP2ECW','JP2KAK','JP2MrSID']])
for d in drivers+[None]:
try:
ds=gdal.Open('API_PROXY:'+f) #Some jp2s crash on open
result = do_some_operation(ds) #Some crash on I/O
break
except:
if d:d.Deregister()#skip crashing driver
gdal.AllRegister() #Reset drivers
However, setting GDAL_SKIP seems to work so I'll use that instead.
drivers=filter(None,[gdal.GetDriverByName(d) for d in
['JP2ECW','JP2KAK','JP2MrSID']])
drivers=[d.ShortName for d in drivers]+[''] #Filter the list to only installed
drivers
for d in drivers:
try:
ds=gdal.Open('API_PROXY:'+f) #Some jp2s crash on open
result = do_some_operation(ds) #Some crash on I/O
break
except:
os.environ['GDAL_SKIP']=d #skip crashing driver or reset env
Luke
If you have received this transmission in error please notify us immediately by
return e-mail and delete all copies. If this e-mail or any attachments have
been sent to you in error, that error does not constitute waiver of any
confidentiality, privilege or copyright in respect of information in the e-mail
or attachments.
Please consider the environment before printing this email.
_______________________________________________
gdal-dev mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/gdal-dev
