My compaq M700 (P3-700MHZ, 256MB) shows the same symptoms. Additionally if I use mplayer with '-zoom -fullscreen' sound and vision quickly go out of sync, and it complains that my system is too slow. My guess is that laptops as slow as mine (and yours) really are too slow for this kind of task.
I'd agree with you there if it weren't for the fact that my Dell laptop (P3-600, 256M, S3 Savage/IX) which is very similar to the Toshiba seems to be able to play these clips perfectly fine.
I did some playing around, dropped the X colour depth to 15 bit, and now have ~15% idle time on my cpu when playing myth recordings. Unfortunately I'm still getting pre-buffering pauses. Looking at the "-v playback" logs from mythfrontend I see that the audio begins to lag by a few frames then the pre-buffering pause will hit. I wonder if there may be a problem with audio (yamaha chip) or the machine is RAM starved (192MB). Time to dig through the ALSA archives and hunt for some more RAM for the laptop (although something tells me 192MB was the maximum RAM this machine could take).
Still looking for ideas, Shawn Flynn
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