Hi JP, Thanks for your answer, and we don't need sound. By a "fast disk", what do you recommend ? Your ffmpeg reader is based on the current OSG plugin or is it a custom one ?
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. Cheers, On Wed, Mar 10, 2010 at 4:53 PM, J.P. Delport <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 >> 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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