Prerecording
Select PRERECORDING to adjust prerecording parameters.
Prerecord Select to toggle prerecording mode On or Off
Buffer size Select to set the buffer size. Following buffer
sizes are available:
220 MB
660 MB
Calculated duration Shows the prerecording duration that is derived
from buffer size, codec and current fps.
When prerecording is enabled, press the record button once to start
prerecording. Active prerecording is indicated by a yellow PRE in the
status overlays on EVF and MON OUT (if enabled) and on the HOME
screen. As long as prerecording is running, the ALEXA writes images,
audio and metadata into a ring buffer of the duration shown under
Calculated duration. When the buffer has filled up, the oldest data in the
buffer gets overwritten. This process continues as long as prerecording
is running.
Press the record button a second time to start regular recording. All
data that has been gathered during prerecording is prepended to the
clip.
Press the record button again to bring the ALEXA back into standby.
Note: The calculated duration depends on buffer size, codec and currently set
framerate. Changing either of them will change the prerecording duration.
Note: If the beeper mode has been set to Start or Start+Stop, the ALEXA beeps
only on prerecording start, but not when going from prerecording to recording,
as the beep would be recorded when audio is enabled otherwise.
Note: Prerecording is only available with ProRes recording.
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