Grass Valley Kalypso User Manual V.15.0 - Manual (Page 272)

272 Kalypso — User Manual
Section 3 — System Operation
HD/Duo Cache Load and Disk Save Times
Still Store images and clips are stored on disk. Time is required to load the
data from disk to cache for display or playback, and to save the data to the
disk. Images on disk are transferred to the cache automatically during
normal operation. The transfer process is optimized in this direction, so
caching from disk is quicker than saving to disk.
The actual time required to transfer files varies. Video only still images
transfer fairly rapidly, requiring from about one-half second to two and
one-half seconds depending on format. Animation clips, however, contain
large amounts of data and can take considerably longer to load and save
(
Table 9 ).
If a single HD animation were to fill a HD/Duo cache equipped with the
KlipCache option (28 seconds of video), it would take about 33 minutes to
load this clip from disk to the cache, and would take about 1 hour and 14
minutes to save this clip to disk.
Note The Still Store Cache is completely cleared when the Video Processor frame
or the Still Store module is reset.
Fenced Image Save and Load Times
Fenced images are not full raster, and so reduces storage requirements and
improves access times. The approximate clip load and save times listed in
Table 10 are multiples of real time. For example, a one second 720p video
only clip that takes 70 seconds (1 min. 10 sec.) to load from disk to cache if
full raster can be cached in 3 seconds if fenced at 1/25 size.
Table 9. Approximate HD/Duo Still Store Load and Save Times
Image Type Load Time Required
a
a Double the time for Video with Key stills or animations.
Save Time Required
a
HD 720p 1080i 720p 1080i
Full Raster Video Only Still 1 sec. 2.5 sec 3.5 sec. 7.5 sec.
1 Sec. Full Raster Animation 1 min. 10 sec. 1 min. 15 sec. 2.5 min. 3 min.
10 Sec. Full Raster Animation 12 min. 12.5 min. 25 min. 30 min.
SD 525i/60 625i/50 525i/60 625i/50
Full Raster Video Only Still 0.6 sec. 0.7 sec. 1.6 sec. 1.9 sec.
1 Sec. Full Raster Animation 18 sec. 33 sec.
10 Sec. Full Raster Animation 3.0 min. 5.5 min.
Table 10. Approximate HD/Duo Video Only Animation Clip Load and Save Times
Video Only
Raster Size
525i/625i 720p 1080i
Load Time a Save Time a Load Time a Save Time a Load Time a Save Time a
Full 18 x 33 x 70 x 150 x 75 x 175 x
1/4 4 x 7 x 18 x 40 x 19 x 44 x