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Realtime is also needed for multimediaRealtime is also needed for multimediaPosted Dec 7, 2007 1:22 UTC (Fri) by giraffedata (subscriber, #1954)In reply to: Realtime is also needed for multimedia by ssavitzky Parent article: Enterprise realtime and cooperative development
If I don't have a low-latency kernel (obtainable from, e.g., 64studio or ubuntustudio) I can't record audio without dropouts. s/low-latency/bounded-latency These kernels have greater latency on average than kernel.org. They just have better worst-case latency.
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Realtime is also needed for multimedia Posted Dec 7, 2007 4:13 UTC (Fri) by ssavitzky (subscriber, #2855) [Link] That would be more nearly correct, though whether they're better or worse on average probably depends on the exact workload. I believe that, originally, they really did have lower latency; many of those patches have made it into the mainstream kernels because they also improved performance on SMP systems by making more of the kernel pre-emptable.
Realtime is also needed for multimedia Posted Dec 7, 2007 16:50 UTC (Fri) by niv (subscriber, #8656) [Link] Do you futz around with the priority of your application, though? I'd be interested in hearing what your experience was in terms of latencies.
Realtime is also needed for multimedia Posted Dec 8, 2007 4:16 UTC (Sat) by ssavitzky (subscriber, #2855) [Link] I don't normally tweak priorities, but I don't usually have anything running when I'm recording except Audacity, an xterm, and X. I've found that you want to use a separate video card rather than one that shares main memory, and you want to turn off the DRI (Direct Rendering Interface) in the X server config file. Recording onto an NFS-mounted filesystem is dicey.
Realtime is also needed for multimedia Posted Dec 11, 2007 1:55 UTC (Tue) by RobertBrockway (subscriber, #48927) [Link] Perhaps you don't want to run X on the box at all. X is network transparent so you can display Audacity to another box on the network. Yes this means involving another box (or a thin client) but it _might_ give better performance.
Realtime is also needed for multimedia Posted Dec 11, 2007 14:31 UTC (Tue) by ssavitzky (subscriber, #2855) [Link] I actually recorded about 2/3 of my CD that way -- it worked, but there was a noticable lag that made it less responsive for editing and overdubbing. My current recording box is a dual-core CPU, which gives me the best of both worlds.
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