Owner`s manual

nanoFlash FAQs
10-Apr-10 ©Convergent Design, Inc. Page 15 of 42
d. Proxy recording at 18 Mbps 4:2:0 Long-GOP
e. MPEG2 files can be played in DVD or Blu-Ray disks (use .MPG format)
f. Universal native NLE support: FCP, Avid, Edius, Vegas, Premiere
g. No need to transcode or translate files, plays directly off the CF card.
h. Comprehensive HD and SD format support (1080i, 1080p, 720p, 480i, 576i)
i. Low-power and small size hardware implementation (Sony CODEC module)
j. Provides for a much faster, better editing experience than compared to some other
CODECs.
59. What is the difference between I-Frame and Long-GOP?
I-Frame mode compresses each frame independently (spatial compression). Long-GOP
consists of a compressed group of 12 to 15 frames starting with an I-Frame, followed by P
(Predicted) and B (Bi-directional) frames. The P and B frames compress the difference of
the current frame as compared to the original I-Frame (as known as temporal
compression).
60. Will nanoFlash ever support uncompressed video record / playback?
Technically this is possible with the new SanDisk Extreme Pro Compact Flash cards.
These new cards boast 90Mbps R/W speeds, so two cards in a Raid1 configuration would
provide sufficient bandwidth for record/playback of uncompressed HD video. The video
would not be stored in a single file-based format, however, and the record time would be
limited to about 17 minutes (using two Sandisk Extreme Pro 64GB cards, which currently
cost US $700 each!). So while technically possible, we see very little gain in the video
quality compared to the extra cost and headaches associated with uncompressed.
61. How is MPEG2 different from other CODECs?
MPEG2 can support highly efficient Long-GOP as well as Intraframe modes.
With the nanoFlash you have the luxury of using either, as the situation warrants.
Our MPEG2 is a very sophisticated high quality implementation. With some other
CODECs, one may get 100 Mbps, but only in certain modes, with ours, if you choose 100
Mbps, you get 100 Mbps for 1080i60, and 1080p24 and all other modes.
62. Which NLEs support MPEG2?
Almost all professional NLEs support our XDCAM 422 MPEG2, including Avid, Final Cut
Pro, Edius, Vegas and Premiere (with the Main Concept CODEC Plugin-see last page for
special offer to nanoFlash customers..