On Thu, May 06, 2010 at 04:45:42AM -0700, cullam Bruce-Lockhart wrote: > > Hi there. Sorry if this is a repeat, I sent the same message out the other > day, but before I'd subscribed, so I think it got filtered out. Anyway, I'm > looking into the > feasibility of using Schrodinger tools in a piece of > software on board an Autonomous Underwater Vehicle. I've got > an analog video camera on board the vehicle, which is > converted to a digital YCrCb 4:2:2 feed over Ethernet through a Pleora IP > Engine. This video stream has a 720X520 > resolution, but is completely uncompressed. > > My big question, is how fast can the algorithms in > Schrodinger handle medium quality compression? I'm assuming > that intraframe compression would be faster than interframe, > and I'd prefer for everything to be viewable as a still > image anyway. So I guess I'd need it to do something along > the lines of 720X520 intraframe compression at around 10-15 > frames per second, with a 10 hour video file being under > around 40 GBytes, while running on a PC-104 (intel Atom > processor) with a non-GUI Ubuntu operating system. Does > anybody know if real time encoding at that level, on such a > computer might be possible? > Thanks a lot for the assistance!
As a slightly arbitrary data point, 4:2:2 720x520 @ 10fps, vc2_simple or vc2_main profile, encodes in one core of a Core2 clocked at 1.67 Ghz at approximately twice real time. Converting to 4:2:0 first makes things faster. Main profile Dirac (not intra) can be configured at a variety of speeds and can be nearly as fast as intra encoding, however, you would need to know which undocumented magic parameters have an effect on speed. It is a goal for a future release to expose this as a generic "speed" setting. dave... ------------------------------------------------------------------------------ _______________________________________________ Schrodinger-devel mailing list Schrodinger-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/schrodinger-devel
