Select Fps Function; Relation Between The Number Of; Playback Frames (Outline Of Select Fps) - Sony SRW-1 Operation Manual

7-2 Select FPS Function

Select FPS allows you to obtain smooth motion effects
without skipped frames by adjusting the number of frames
to be shot. It is available when this unit is in docked
operation or in separate operation (over optical-fiber
connection) with the F23/F35 that supports the Select FPS
function.
Changing the number of frames to extract during recording
provides motion effects with variable speeds (Ramp
function).
The number of frames recorded in 1 second is displayed in
units of FPS (frames per second).
It can be set at steps of 1 FPS within the following range.
For 4:2:2 formats: 1 to 60 FPS (when the F23 is used) or
1 to 50 FPS (when the F35 is used)
For 4:4:4 formats: 1 to 30 FPS (1 to 60 FPS in docked
operation with the optional HKSR-103 board
installed)
When installing the HKSR-103, refer to the HKSR-103
Installation Manual.
For details on the Ramp function, see 7-2-3 "Using the
Ramp Function" (page 88).
Note
The Select FPS function is not available during separate
operation with BNC connection.
7-2-1 Relation Between the Number
of Frames Shot and the
Number of Playback Frames
(Outline of Select FPS)
To obtain the desired slow or quick motion effects using
the Select FPS function, it is necessary to set the
appropriate number of frames to shoot.
If you shoot using a camera with the number of frames shot
set to 50 FPS, the camera generates 50 frames (50 FPS)
while the data is transferred from the camera to the VTR at
60P. As a result, transferred data is padded with frames
(ineffective frames) in which no signal is recorded. This
unit extracts and stores only effective frames and records
them onto tape. When the tape is played back at 24P, a
slow motion effect of 0.48 times normal playback speed is
obtained.
The following figure illustrates the operation described
above.
84
7-2 Select FPS Function