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> 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>> 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> >> >> >> 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 >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> 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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