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P2HD
AG-HPX502
X
PRACTICAL GUIDEBOOK
Variable Frame Rate-capable recording modes
About the difference between Native (pN) and "over60p" Mode
When recording in native (pN) mode, it is possible to check data recorded at Variable Frame Rate (VFR), such as slow
motion or quick motion, with camera output. Also, only valid frames are recorded, extending the recording time and
allowing more data to be stored on the P2 card than is possible in normal mode. (See accompanying table)
Over60 = Varicam-compatible mode; VFR recording is possible, but the difference in pulldown systems makes it
impossible to check the VFR with camera output. A frame rate converter such as hardware or NLE should be used.
About standard recording (over60)
As with Varicam, regardless of the camera's frame rate setting, recording will occur at 60 frames per second (over60).
For example, when 24p mode is selected, 60 frames will be recorded with 2:3 pulldown. Thus, no matter what frame rate
is selected, it is necessary to have the storage capacity for 60 frames, including duplicate frames. The advantages of
standard recording are: output from the IEEE 1394 interface to DVCPRO HD is possible during recording, and when
recording for extended periods, FS-100 data storage or DVCPRO HD tape storage in the AJ-HD1400, etc., is possible.
For undercrank and overcrank shooting, as long as special effects are not required, shooting in native mode
(30pN/25pN/24pN) is recommended in order to save space on the P2 card.
*To check variable frame when using 720p, a frame rate converter (hard device such as the AJ-FRC27, or similar software) is necessary.
About native recording
30pN/25pN/24pN are recording formats. The letter "N" indicates Native. In native mode, video data is recorded on the
P2 card at the frame rate used by the camera. In this mode, it is possible to record on a P2 card for 2 to 2.5 times as
long as in standard (30p/25p/24p) mode. Another major advantage of native mode is that it allows on-the-spot playback
of variable frame data without a frame rate converter. After recording, it is possible to output to DVCPRO HD from the
IEEE 1394 interface.
*Native recording is the recommended mode for chroma key synthesis.
Usage of native recording
720/24pN
720/30pN
720/25pN
Data capacity for each recording type
Standard recording
Native recording
Recording time for P2 card using VFR (16GB)
HD
*1 "24p" is recorded as 23.98p, "30p" as 29.97p, and "60p" / "60i" as 59.94p and 59.94i respectively.
*2 Only valid frames will be recorded when in native mode.
*3 When using 8GB P2 cards or mini DV tape, the stated recording times are valid when using two P2 cards, or when using AY-DVM60, respectively. When one 8B card is used,
7
recording time will be 1/2 of that shown.
Variable Frame Rate
3
Data capacity according to
collection format
Variable frame rate functions at the 720P setting when "OPERATION TYPE" is set to FILM CAM.
1G=1 minute
1G=2 minutes (using 30pN/25pN)
1G=2.5 minutes (using 24pN)
1
Format *
720/60p
720/50p
720/24p(over 60p)
720/25p(over 60p)
720/30p(over 60p)
2
720/24pN(Native)*
2
720/25pN(Native)*
2
720/30pN(Native)*
Commercials, music videos, CG synthesis, Blu-Ray/HD-DVD content,
Web video, mobile-terminal video (progressive moving image), etc.
(DVCPRO HD)
Recording codec
DVCPRO HD
3
Recording time*
Recording time
(One card using)
(Four card using)
16 minutes
64 minutes
40 minutes
160 minutes
32 minutes
128 minutes
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