On 2010-02-06 14:55 , Jim Stallard wrote:
> I have a bunch of BBC documentaries in mkv and avi format all HDTV
x264. [...]
> Sometimes it will play for 20 minutes then choke, or the video plays
> fine but the sound is choppy, or vice versa, or everything is just
> stuttering every 10-30 seconds or so.
> Power Mac G5 (1.8 Ghz, 1 Meg DRAMM [DDR SDRAM PC3200U-30330 (four slot)])
[...]
> What is limiting the playback?
> The processor speed (which can't be change?)
> or the DRAMM? (I still have two slots free, and max out and replace all
> four?)

there are different resolutions that match your description; here are
Apple's minimum recommendations:

<http://www.apple.com/quicktime/guide/hd/recommendations.html>

so you see you meet the minimum for 720p, but since you are right at the
minimum, anything else competing for resources (e.g. background
processes, other apps running, even USB drives) may mean the difference;
for 1080p, it would be no surprise at all that your system balks; more
RAM might help (and seems advisable anyway), but no guarantees


--
This list is a free service of LassoSoft: http://www.LassoSoft.com/
Search the list archives: http://www.ListSearch.com/InDesign/Browse/
Manage your subscription: http://www.ListSearch.com/InDesign/