8. Recording Motion Pictures
194
∫ Indication of the icon
A Size
B ALL-lntra
C Bit rate
D Recording frame rate (Sensor output)
• “ALL-Intra” refers to a data compression
method in which each frame is compressed. The file size of motion pictures recorded
in this method becomes larger, but this method can prevent the loss of image quality
because editing does not require re-encoding.
• What is bit rate
This is the volume of data for a definite period of time, and the quality becomes
higher when the number gets bigger. This unit is using the “VBR” recording method.
“VBR” is an abbreviation for “Variable Bit Rate”, and the bit rate (volume of data for
definite period of time) is changed automatically depending on the subject to record.
Therefore, the recording time is shortened when a subject with fast movement is
recorded.
• Depending on the [Rec Format] and [Rec Quality] of a motion picture, the speed
class rating required for the card differs. Use a card that meets the rating. For details,
refer to
“About the motion picture recording and speed class” on P22.
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