Yeah. I did a "make install" step that saved all of the files to /usr/local/lib and /usr/local/include. The thumb drive was just for temporary storage while building.
On Monday, September 23, 2013, Matthew Witherwax wrote: > Mike, > > I look forward to your write up. I am glad to hear distcc worked for > you. A note about the files to put on the BBB, you should really only need > the compiled libs and the header files. The build I did on my surface > (Windows) created a directory called install that has a lib and an include > directory with a total size of ~10 MB. I would imagine the build for Linux > would be close to that. > > > On Mon, Sep 23, 2013 at 3:48 AM, Michael Darling > <[email protected]>wrote: > > I have confirmed that it is indeed possible to grab AND convert frames at > 640x480 and 30 fps with the BBB and Logitech C920 operating in MJPEG mode. > My solution was to basically install libjpeg-turbo from source with NEON > enabled and then building and installing OpenCV from source, using > libjpeg-turbo as the JPEG codec. I also built OpenCV with NEON enabled. > > Here is sample output with every frame being processed. The 'top' utility > shows about 50% CPU and only about 2% memory usage. Before executing the > code, I set the CPU to operate at constant 1Ghz using "sudo cpufreq-set -g > performance" so that there isn't a "slow start" while the BBB starts > grabbing frames at 300 Mhz before it finally kicks into 1Ghz under load. > > time ./framegrabber -f mjpeg -H 480 -W 640 -c 1000 -I 30 -o > Startup took 0.000000 seconds > Captured 1000 frames and Processed 1000 in 13.940000 seconds > Shutdown took 0.010000 seconds > > > real 0m33.760s > user 0m11.566s > sys 0m2.518s > > I ended up using distcc to do a distributed cross-build of OpenCV on my > PC, but still had problems with running out of space trying to store all of > the source and object files on the 2GB eMMC on the BBB. I ended up having > to mount an ext2 formatted filesystem using a USB thumb drive hooked up to > the BBB and building OpenCV from there. I probably ended up doing a lot of > extraneous things that had little to no effect but I do have a working > process for those who need to get 30 fps. I need to go back and clean up > some notes I took and then I plan to post a step-by-step guide for anybody > else who wants to replicate what I did. > > Thanks, > -Mike > > > On Sat, Sep 21, 2013 at 4:48 PM, Matthew Witherwax <[email protected]>wrote: > > Jon, > > I hope you find it useful. I would appreciate any feedback you have to > give. > > Best of luck, > Matthew > > > On Sat, Sep 21, 2013 at 4:54 AM, <[email protected]> wrote: > > Matthew, > > Thanks! That may be really useful for me. Am messing around with a PTZ > camera at the moment, and lag in the video stream has been a bit of a > problem so far.. > > Regards, > Jon > > > On Friday, 20 September 2013 14:01:23 UTC+1, Matthew Witherwax wrote: > > William, > > I have posted my streaming code and writeup here > http://blog.lemoneerlabs.com/**post/bbb-mjpeg-streaming<http://blog.lemoneerlabs.com/post/bbb-mjpeg-streaming> > > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/G5Xs2JuwD_4/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > <https://groups.google.com/d/topic/beagleboard/G5Xs2JuwD_4/unsubscribe> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
