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Chapter 6 File Operations
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6-1 Overview
6-1-2 File Operation Restrictions
This section explains which operations are possible on
files stored in each directory.
When required, the following operation tables distinguish
reading and writing from partial reading and writing.
Read: Read data sequentially from the start to the end of
the file.
Partial read: Read only a part of the data in the file.
Write: Write data sequentially from the start to the end of
the file.
Partial write: Write data to a part of the file only.
Root directory
a) Only files which can be written by XDCAM
Notes
• Directories cannot be created in the root directory.
• The directories in the root directory (Clip, Edit, Sub, and
General) cannot be deleted or renamed.
Clip Directory
a) Only files which are 2 seconds or longer in length, in a format matching
the line mode format (525/625) and recording format (IMX50/IMX40/
IMX30/DVCAM and number of audio channels) of the recorded sections
of the disc, and which can be overwritten by XDCAM.
b) Only most recently recorded clip
c) Only files which can be written by XDCAM
d) When a C*.MXF file is created, a C*M01.XML file with the same number
is generated automatically.
e) When a C*.MXF is deleted, the C*M01.XML file with the same number
is also deleted automatically.
Note
Directories cannot be created in the Clip directory.
Edit Directory
File name Content Operations
Read/
Partial read
Write/
Partial write
Rename Create Delete
INDEX.XML Contains information about all
material on the disc.
YesNoNoNoNo
DISCMETA.XML Contains the disc ID and disc label. Yes
Ye s
a)
No No No
Other files Files other than the above − No − No −
File name Content Operations
Read/
Partial read
Write/
Partial write
Rename Create Delete
C*.MXF Clip file created by recording (MXF
file)
*: 0001 to 0300
Ye s No N o
Ye s
a)
Ye s
b)
C*M01.XML Metadata file generated
automatically when C*.MXF file is
created.
*: 0001 to 0300
Ye s
Ye s
c)
No
No
d)
No
e)
Other files Files other than the above − No − No −
File name Content Operations
Read/
Partial read
Write/
Partial write
Rename Create Delete
E*E01.SMI Clip list file
*: 0001 to 0099
Ye s
Ye s
a)
No
Ye s
b)
Ye s
c)