Hi JP, Thanks for your reply, we've tested to share the contexts but it wasn't much better.
Cheers, On Thu, Mar 25, 2010 at 9:24 AM, J.P. Delport <jpdelp...@csir.co.za> wrote: > Hi Serge, > > Serge Lages wrote: > >> Hi all, >> >> Still having problems playing my big video. Here is our current state : >> >> - On a single screen setup (with only one GT 220 GeForce), with a >> composite viewer and 4 windows (450x800 each window), it plays smoothly at >> 60 fps with a fluid video, no problem here. >> - On the destination setup : Intel QuadCore + 2 GeForce GTX 285 + 4 >> screens in 1360x768 (2 screens per cards), a composite viewer with one view >> per screen, it plays between 10 and 20 fps... We've made our tests on WinXP >> and Win7 with the same result. >> >> The technique we're currently using is the one from Robert, having a big >> osg::Image updated by ffmpeg, and having 4 images for the textures pointing >> at the correct location on the large one. The video's size is 768x6532. >> > > Have you tried sharing the context for the two views per card? Also, you > are now uploading twice the data needed to each GPU, because each one is > only viewing half the data. I'm sorry I can't help further currently, I > would love to test on Linux, but don't have time... > > jp > > >> You can find attached the current code, any idea on what can be better ? >> Or any other idea on how to handle this problem ? And any chance for someone >> to test on Linux ? >> You can also find the test video here : >> http://labs.tharsis-software.com/outv.mp4 >> >> Thanks ! >> >> On Thu, Mar 11, 2010 at 9:53 AM, Serge Lages <serge.la...@gmail.com<mailto: >> serge.la...@gmail.com>> wrote: >> >> Hi all, >> >> Thanks for your advices. About the current setup, we're using only >> one screen with a 9800GT card (and 4 windows) for our tests, but the >> final setup will be composed of 2 9800GT cards and 4 screens. >> >> I'll let you know how our tests goes. >> Cheers, >> >> >> On Thu, Mar 11, 2010 at 8:28 AM, J.P. Delport <jpdelp...@csir.co.za >> <mailto:jpdelp...@csir.co.za>> wrote: >> >> Hi, >> >> >> Serge Lages wrote: >> >> Hi JP, >> >> Thanks for your answer, and we don't need sound. By a "fast >> disk", what do you recommend ? >> >> >> We have a raid0 setup that can sustain 150MB/s. >> >> >> Your ffmpeg reader is based on the current OSG plugin or is >> it a custom one ? >> >> >> It's a custom one, but not complicated. It basically pops the >> output of ffmpeg decompress into an osg::Image, set's PBO on >> that and lets OSG upload it. We are using only monochrome images >> though (GL_LUMINANCE). >> >> >> >> About our file, with some codecs and adjustments on the >> bitrate, we're able to play it with VLC without problems, so >> I think the reading part can be handled by the ffmpeg plugin >> with only one file, but then we need to dispatch this image >> on 4 textures. We're currently trying to do some tests. >> >> >> I'm still not sure where your problem area is. If it's not >> decoding it can only be upload to GPU or final rendering. You >> should be able to check this by varying the complexity of the >> rendering. >> >> jp >> >> >> Cheers, >> >> >> On Wed, Mar 10, 2010 at 4:53 PM, J.P. Delport >> <jpdelp...@csir.co.za <mailto:jpdelp...@csir.co.za> >> <mailto:jpdelp...@csir.co.za <mailto:jpdelp...@csir.co.za>>> >> >> wrote: >> >> Hi Serge, >> >> >> >> >> Serge Lages wrote: >> >> Hi all, >> >> We currently need to play a big video (approximately >> 5500*800) >> on 4 screens within an OSG application (we use a >> composite >> viewer), so we've tried : >> >> - Cut the video in 4 parts, but it seems really hard to >> synchronize the 4 streams. >> - Decode directly the big file, resulting with a very >> big >> texture split on 4 quads (with appropriate texture >> coords), but >> even with a powerful computer, it's very slow. >> >> Any idea on what's the best approach for this problem >> ? We're >> currently making our tests using the ffmpeg plugin, >> but maybe >> another plugin would be more appropriate ? >> Thanks in advance for your help. >> >> >> some ideas/questions. We do something similar - stitch >> four high-res >> camera videos into large texture. We have custom ffmpeg >> reader that >> just reads from 4 video files and we step them manually >> (and in >> sync) one frame at a time. We use raw video (no >> compression) to >> avoid cpu decompress, but now one needs fast disks. We >> don't have >> sound, do you need sound? For large sizes one needs to >> avoid copying >> around data in cpu mem as much as possible. There is >> still one copy >> in ffmpeg raw read that I need to get rid of. >> >> rgds >> jp >> >> >> Cheers, >> >> -- Serge Lages >> http://www.tharsis-software.com >> >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> <mailto:osg-users@lists.openscenegraph.org> >> <mailto:osg-users@lists.openscenegraph.org >> <mailto:osg-users@lists.openscenegraph.org>> >> >> >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> >> -- This message is subject to the CSIR's copyright >> terms and >> conditions, e-mail legal notice, and implemented Open >> Document >> Format (ODF) standard. The full disclaimer details can be >> found at >> http://www.csir.co.za/disclaimer.html. >> >> This message has been scanned for viruses and dangerous >> content by >> MailScanner, and is believed to be clean. MailScanner >> thanks >> Transtec Computers for their support. >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> <mailto:osg-users@lists.openscenegraph.org> >> <mailto:osg-users@lists.openscenegraph.org >> <mailto:osg-users@lists.openscenegraph.org>> >> >> >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> >> >> >> -- Serge Lages >> http://www.tharsis-software.com >> >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> <mailto:osg-users@lists.openscenegraph.org> >> >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> >> -- This message is subject to the CSIR's copyright terms >> and >> conditions, e-mail legal notice, and implemented Open Document >> Format (ODF) standard. The full disclaimer details can be found >> at http://www.csir.co.za/disclaimer.html. >> >> This message has been scanned for viruses and dangerous content >> by MailScanner, and is believed to be clean. MailScanner thanks >> Transtec Computers for their support. >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> <mailto:osg-users@lists.openscenegraph.org> >> >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> >> >> >> -- Serge Lages >> http://www.tharsis-software.com >> >> >> >> >> -- >> Serge Lages >> http://www.tharsis-software.com >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > > -- > This message is subject to the CSIR's copyright terms and conditions, > e-mail legal notice, and implemented Open Document Format (ODF) standard. > The full disclaimer details can be found at > http://www.csir.co.za/disclaimer.html. > > This message has been scanned for viruses and dangerous content by > MailScanner, and is believed to be clean. MailScanner thanks Transtec > Computers for their support. > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- Serge Lages http://www.tharsis-software.com
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