From: Thormodo <gam...@ho...> - 2011-05-03 15:12:42
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Hello, I finished installing OpenCV today on my Gumstix. (Just by installing all the required packages (opencv, ffmpeg, libx264 etcetera) via opkg). After that I native compiled a piece of code. Now everything seems to work okayish, as I can process an image and display it etc. Because I want to use the Caspa Camera later (it's not here yet), I tried to grab a frame from an .avi file and save it. Now I do get the captured frame saved, but I also get the warning below (per frame that I take). [Swscaler @ 0xaef00] No accelerated colorspace conversion found from yuv420p to bgr24. Now on the PC I fixed this warning by compiling and reinstalling x264, libx264-dev, and ffmpeg like so: http://ubuntuforums.org/showthread.php?t=786095 Then installing OpenCV like so: http://www.samontab.com/web/2010/04/installing-opencv-2-1-in-ubuntu/ (As suggested by this post: This problem is basically an issue converting YUV to RGB using ffmpeg, in order for it to work ffmpeg needs to be recompiled with x264. To get around it use the following to recompile ffmpeg and OpenCV 2.1/2.2: http://alexsleat.co.uk/2011/01/09/how-to-fix-no-accelerated-colorspace-conversion-found-from-yuv420p-to-bgr24-opencv-2-2-0-ubuntu-10-10/ ) So my question is, has anyone used OpenCV on the Gumstix and has seen this warning before and knows how to fix it? Thanks, Maarten -- View this message in context: http://old.nabble.com/-OpenCV--No-accelerated-colorspace-conversion-found-from-yuv420p-to-bgr24.-tp31533444p31533444.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: Thormodo <gam...@ho...> - 2011-05-12 09:23:53
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Maybe not needed to "kick" this topic up. But turned out that this problem only occurs when trying to capture from an .avi file (as the Caspa camera (obviously) captures in a different format). I just received my Caspa camera today and everything works great. So if anyone has any questions regarding OpenCV on Gumstix feel free to ask. When I'm done with my assignment, I can post my "findings" somewhere if people like that. Thormodo wrote: > > Hello, > > I finished installing OpenCV today on my Gumstix. (Just by installing all > the required packages (opencv, ffmpeg, libx264-dev etcetera) via opkg). > After that I native compiled a piece of code. > > Now everything seems to work okayish, as I can process an image and > display it etc. > > Because I want to use the Caspa Camera later (it's not here yet), I tried > to grab a frame from an .avi file and save it. Now I do get the captured > frame saved, but I also get the warning below (per frame that I take). > > [Swscaler @ 0xaef00] No accelerated colorspace conversion found from > yuv420p to bgr24. > > Now on the PC I fixed this warning by compiling and reinstalling x264, > libx264-dev, and ffmpeg like so: > http://ubuntuforums.org/showthread.php?t=786095 > > Then installing OpenCV like so: > http://www.samontab.com/web/2010/04/installing-opencv-2-1-in-ubuntu/ > > (As suggested by this post: > This problem is basically an issue converting YUV to RGB using ffmpeg, in > order for it to work ffmpeg needs to be recompiled with x264. To get > around it use the following to recompile ffmpeg and OpenCV 2.1/2.2: > http://alexsleat.co.uk/2011/01/09/how-to-fix-no-accelerated-colorspace-conversion-found-from-yuv420p-to-bgr24-opencv-2-2-0-ubuntu-10-10/ > ) > > So my question is, has anyone used OpenCV on the Gumstix and has seen > this warning before and knows how to fix it? > > Thanks, > Maarten > -- View this message in context: http://old.nabble.com/-OpenCV--No-accelerated-colorspace-conversion-found-from-yuv420p-to-bgr24.-tp31533444p31601401.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: alxx <al...@al...> - 2011-05-12 12:18:35
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Haven't had any problems using a logitech webcam with opencv in c and c++. haven't had time to get py opencv setup properly yet. Would be a good idea to post it up as a wiki page. Alex > > Maybe not needed to "kick" this topic up. But turned out that this problem > only occurs when trying to capture from an .avi file (as the Caspa camera > (obviously) captures in a different format). I just received my Caspa > camera > today and everything works great. > > So if anyone has any questions regarding OpenCV on Gumstix feel free to > ask. > When I'm done with my assignment, I can post my "findings" somewhere if > people like that. > > > Thormodo wrote: >> >> Hello, >> >> I finished installing OpenCV today on my Gumstix. (Just by installing >> all >> the required packages (opencv, ffmpeg, libx264-dev etcetera) via opkg). >> After that I native compiled a piece of code. >> >> Now everything seems to work okayish, as I can process an image and >> display it etc. >> >> Because I want to use the Caspa Camera later (it's not here yet), I >> tried >> to grab a frame from an .avi file and save it. Now I do get the captured >> frame saved, but I also get the warning below (per frame that I take). >> >> [Swscaler @ 0xaef00] No accelerated colorspace conversion found from >> yuv420p to bgr24. >> >> Now on the PC I fixed this warning by compiling and reinstalling x264, >> libx264-dev, and ffmpeg like so: >> http://ubuntuforums.org/showthread.php?t=786095 >> >> Then installing OpenCV like so: >> http://www.samontab.com/web/2010/04/installing-opencv-2-1-in-ubuntu/ >> >> (As suggested by this post: >> This problem is basically an issue converting YUV to RGB using ffmpeg, >> in >> order for it to work ffmpeg needs to be recompiled with x264. To get >> around it use the following to recompile ffmpeg and OpenCV 2.1/2.2: >> http://alexsleat.co.uk/2011/01/09/how-to-fix-no-accelerated-colorspace-conversion-found-from-yuv420p-to-bgr24-opencv-2-2-0-ubuntu-10-10/ >> ) >> >> So my question is, has anyone used OpenCV on the Gumstix and has seen >> this warning before and knows how to fix it? >> >> Thanks, >> Maarten >> > > -- > View this message in context: > http://old.nabble.com/-OpenCV--No-accelerated-colorspace-conversion-found-from-yuv420p-to-bgr24.-tp31533444p31601401.html > Sent from the Gumstix mailing list archive at Nabble.com. > > > ------------------------------------------------------------------------------ > Achieve unprecedented app performance and reliability > What every C/C++ and Fortran developer should know. > Learn how Intel has extended the reach of its next-generation tools > to help boost performance applications - inlcuding clusters. > http://p.sf.net/sfu/intel-dev2devmay > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |