I've seen one report of this elsewhere. What I was seeing, Mythtv Live TV consume an overall >99% of my 1Ghz pentium3 cpu resource on my laptop. During Live TV playback, I was seeing quite a few "prebuffering pause" messages from mythfrontend every second or so. The result was very jerky video.
After recompiling sys-libs/glibc, with CFLAGS="-march=pentium3 -O3 -pipe -fomit-frame-pointer" instead of just the default -O2, I'm seeing only one or two "prebuffering pause" messages. (Usually they'll occur during switching between virtual desktops.) I'm stilling seeing an overall ~99% cpu usage (and top shows mythfrontend only using ~60%). Another option I have, activating interlacing on my device: # echo 1 > /sys/class/pvrusb2/sn-7435104/ctl_interlace/cur_val At this point, I'm seeing Mythtv's cpu usage further drop down to an overall ~30-48%. (Top shows mythfronted drop to ~20%.) (One reason I'm seeing an additional 20% cpu spike every 5 seconds is due to gkrellm2.) Hauppauge WinTV PVR USB2 Streams mpeg2-ps @ 720x480 -- Roger http://www.eskimo.com/~roger/index.html Key fingerprint = 8977 A252 2623 F567 70CD 1261 640F C963 1005 1D61 Tue Aug 9 12:06:46 PDT 2005
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