Owner`s manual

nanoFlash FAQs
10-Apr-10 ©Convergent Design, Inc. Page 14 of 42
The clips on a CompactFlash card can be transferred to the Nexto’s hard drive at
approximately 25 megabytes per second (MBps). When extracting the clips to another
computer, via the built-in ESATA interface, the transfer speed is approximately 60 MBps.
We recommend purchasing the extra battery with the Nexto, as the internal rechargeable
battery power is limited to a transfer of approximately 80 Gigabytes.
56. Can video data be transferred to XDCAM optical media for archival or delivery?
Yes, but you must record in the MXF file format at 50Mbps Long-GOP. The MXF files can
be copied to the Sony XDCAM media for archival, delivery and playback in HD-1500
decks.
See: http://blog.abelcine.com/2009/11/17/how-to-put-nanoflash-video-on-a-xdcam-disc/
for more
details.
MPEG2 Compression
57. Why is video compression necessary?
Uncompressed HD video has a bit-rate of approximately 1200 Mbps or 125 to 150 MBps
(Megabytes per second). This rate would quickly overwhelm the I/O capability (not to
mention the storage capacity of most hard-drives). Compression reduces this data-rate by
10-fold, while allowing visually lossless re-creation of the original material.
58. Why was MPEG2 chosen?
MPEG2 is a very well proven, widely accepted format that offers many advantages in a
portable HD/SD recorder/player, such as nanoFlash, including:
a. Very wide range of supported bit-rates: 5 Mbps to 280 Mbps
b. Sophisticated compression: I-Frame-Only as well as Long-GOP recording
c. Master Quality Full-raster, 4:2:2 180 Mbps/Long-GOP or 280 Mbps/I-Frame-Only