ensegre

Mostly for fun, I have concocted a way of acquiring video using Labview for linux, to mend for the unavailability of IMAQdx. The idea is to grab via v4l2, actually through the handler libv4l2, and to display simply via the picture control. I have tested this for the moment only with webcams at 640x480 on LV11 and 13 (both 32bits) on two different installations of Ubuntu 12.04 64bits, and it works. This means v4l-utils 0.8.6-1ubuntu2, 32bit. Attached is a proof of the concept, essentially a translation of the Appendix E example to the linuxtv API, saved for LV11. I include also a loose set of tools I built myself in order to parse the relevant headers and construct semiautomatically the necessary typedefs (LV13, no backsave out of lazyness). I have two questions: -Is this insane enough to qualify for this forum, or do I have seriously seriously to exaggerate? -Is someone interested in helping me to expand the exercise, checking portability on other distributions and versions of v4l2, other supported image formats, more robust packaging & so on? Intention would be to release a package under GPL. Enrico grab11.zip Import_headers.zip

But that's ugly... and would require a duplicate installation... I haven't tried if LV installs on wine at all, maybe someone did and evaluated limitations? ETA: found this couple of 2009 links on the ni fora: http://forums.ni.com/t5/BreakPoint/LabVIEW-Vision-Toolkit-in-Linux/m-p/1030238 http://forums.ni.com/t5/BreakPoint/LabVIEW-4-under-ReactOS/m-p/852977

No plans to support linux, by chance? I couldn't resist installing it on ubuntu12/LV2011, open a few vi's and replace references lvpython.dll --> lvpython.so, but to no avail (would have been pleasantly surprised if it did...)

Passing by, I found this boolean parser on the NI site. It's neat because it works also in linux, but doesn't support variables which is a hindrance for me, because the workaround is to string-substitute variables and parse the formula at each evaluation, which has a performance hit. Enrico