360 Systems Image Server 2000 - Manual (Page 73)

Image Server 2000 Owner’s Manual Page 73
Transfer of Edited Segments
The Image Server sets MARK-IN and MARK-OUT points in a clip as “edit pointers.” For all edit
operations within a given Image Server, these pointers produce “virtual edits” that save disk space,
and the time it would take to re-write the marked region as a new file.
It is clearly impractical to transfer a long file to obtain a 30-second virtual clip marked within it.
Therefore, the Image Server transfers only the region between In/Out points, and not the entire file.
If you want to transfer the entire recording, be sure that the In/Out markers are set to the beginning
and end of material before the transfer.
To maintain the identity of the transferred clip, the time code references for its Mark-In/Out points
are maintained, as shown in
Figure 26 . (Note that DV files do not contain a start time, so all
segments of edited DV format clips will start at 00:00:00 after being transferred.)
When transferring edited material, keep in mind that you are making copies of the data on the
target device. While subclips that reference the same video content on the original recordings take
up minimal extra disk space, they could take considerably more space on the target storage.
Figure 26 – Result of a network file transfer
Supported file types
Image Server recognizes media file types by their file extension. It is important that the file
extension properly identifies the file content. Attempts to send a file in one format but
masquerading as another due to a wrong file extension may result in undefined behavior. The
following formats are supported:
MXF - Material Exchange Format (.mxf)
The Image Server supports FTP import and export of MPEG-2 files in MXF format conforming to
operational pattern 1A. The video essence must be a standard-definition (NTSC or PAL) MPEG-2
elementary stream, including D10. The audio essence must contain 16 or 24 bit samples, sampled
at 48000 Hz, organized as a single track containing 1, 2 or 4 audio channels. Applicable standards
are SMPTE 377M, 378M and 381M.
MPEG-2 Program Stream (.mpg, .std)
Standard-definition MPEG-2 program streams containing up to 2 stereo pairs of 16-bit, 48K,
MPEG2 Layer 1 audio are supported. 16-bit audio files will be written into a 24-bit space.
01:22:18;04
00:30:00;00
( IN POINT )
00:32:00;00
( OUT POINT )
CLIP_A.mxf
Before Transfer (On Source Image Server)
00:30:00;00 00:32:00;00
CLIP_A.mxf
After Transfer (On Target Image Server)