[ubuntu-uk] cache size - firefox (and googlevideo downloads)

[alan c]

I rarely capture streaming video and it seems I am often facing new 
issues  :-)

I have become experienced with using firefox  to view a clip, then 
using the firefox cached file to replay the clip off line.

However an OLPC video of one hour seems to exceed a size and things do 
not work.

the olpc clip is
http://video.google.com/videoplay?docid=-4285568518538296189&q=user%3A%22Google+engEDU%22&total=538&start=0&num=10&so=0&type=search&plindex=6

and it plays ok, I can also see a cache file (files) increasing in 
size with time by invoking konqueror refresh occasionally (I am using 
kubuntu 7.04).

In firefox preferences I have set preferences>content>file types> 
manage to ask that swf and spl files (flash) are saved to disk, and 
set the Advanced> Network cache size to 2000MB of cache size. However, 
the firefox cache file seems to reach 60MB and then stop increasing in 
size (then disappears!). This corresponds to about 45 minutes of the 
61 minute clip. when the 2000MB cache size was a smaller number, the 
cached file stopped at a smaller size, so maybe I will try using an 
even larger number.  (I did, but it did not seem to change the 
automatic disappearance of the cache file at least. Not sure what file 
size was attained though)

I have watched the particular clip now so many times that I know it by 
heart (my various experiments) - but I am still curious about what is 
happening to limit the cache file.

Shorter videos play ok too (for example 15 minutes), but the cache 
files seem to persist and do not disappear!

comments appreciated
-- 
alan cocks
Kubuntu user#10391