Starting To Record From Pre-Stored Video (Picture Cache Function) - Sony PMW-400K Operating Instructions Manual

To add/delete OK marks
You can also use the THUMBNAIL menu to add
and delete OK marks in previously recorded clips.
For details, see "Adding/Deleting the OK Mark
(FAT-HD Mode Only)" (page 104).
Starting to Record from Pre-
stored Video (Picture Cache
Function)
The camcorder is equipped with enough internal
memory to pre-store up to 15 seconds of video
and audio data in a picture cache. This allows you
to begin recording a specified number of seconds
in advance of the time when you press a recording
start button.
Selecting picture cache mode and setting
the picture cache time
Before recording in picture cache mode, you need
to perform the "Picture Cache Rec" and "P.
Cache Rec Time" settings in the "OPERATION"
menu (see page 117).
You can also select picture cache mode by using
an assignable switch to which the Picture Cache
function has been assigned (see page 158).
The picture cache time determines how far in
advance you can start recording, counting back in
seconds from the operation that starts recording.
Note that it may not be possible to start this far in
advance in the special cases explained in the
following notes.
Notes
• Storage of picture data to memory begins when you
select picture cache mode. Therefore, if you start
recording immediately after selecting picture cache
mode, the picture data from before the selection is not
recorded.
• No data is recorded to picture cache memory during
playback or recording review and display of
thumbnails. It is not possible to record picture data
from the time you were conducting playback or a
recording review.
• Picture cache recording is not possible in Frame Rec,
Interval Rec, and Slow & Quick Motion mode. The
camcorder exits Frame Rec, Interval Rec, or Slow &
Quick Motion mode whenever you select picture cache
mode. The camcorder exits picture cache mode
automatically whenever you select Frame Rec,
Interval Rec, or Slow & Quick Motion mode.
• The data stored in picture cache memory is cleared
when you change the system settings, for example by
selecting a different video format. Picture data from
before the change is not recorded even if you start
recording immediately after the change. The
camcorder exits picture cache mode automatically.
• It is not possible to set the picture cache time during
recording.
• When "OPERATION" > "Format" > "Rec Format" is
set to "XAVC-l," the Picture Cache time can be set up
to 4 seconds.
Camcorder data handling while recording in
picture cache mode
Recording procedures in picture cache mode are
basically the same as normal recording
procedures. However, note the following
differences with respect to how the camcorder
handles video, time, and output data.
• If you start recording while the media is being
accessed, the start point of the video that is
actually recorded may be later than the
currently specified picture cache time. Because
the delay increases as the number of recorded
clips increases, you should avoid rapid start-
and-stop recording operations in picture cache
mode.
• Regardless of the setting of the F-RUN/SET/
R-RUN switch, the advance mode of the
internal timecode generator is always F-RUN.
• In picture cache mode, you cannot set time data
by setting the F-RUN/SET/R-RUN switch to
SET.
To set time data, exit picture cache mode.
• If the remaining free capacity of the media in
the currently selected slot is less than the picture
cache time, and the media in the other slot has
enough remaining capacity, then data is
recorded to the media in the other slot.
However, no data is recorded when there is no
media in the other slot, and when the media in
the other slot does not have enough remaining
capacity. (A message appears in the viewfinder
to inform you that there is not enough remaining
capacity.)
• Shot marks are not recorded if they are set
before the recording start operation.
• When you select a video format that supports
i.LINK HDV output and play a clip that was
recorded in picture cache mode, two or more
frames with the same picture and timecode may
follow on each other.
• i.LINK output is possible during picture cache
recording. However, the picture cache time is
limited.
Advanced Operations 87