360 Systems MAXX-1200-HD, Руководство по эксплуатации

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Page 78 MAXX-1200 Owner’s Manual
The following formats are supported:
JPEG-2000 (.mxf)
JPEG-2000 files wrapped in the .mxf format. The mxf type is Operational Pattern OP1a. The
audio is 24-bit 48KHz PCM (uncompressed) in 8 individual tracks.
These files are compatible with the Edius non-linear editing program from Grass Valley. See the
next section for more information.
JPEG2000 format .mxf files from the Grass Valley Infinity camcorder are also compatible.
JPEG-2000 (.vcf)
JPEG-2000 files are also available in .vcf, a proprietary 360 Systems format. This is a very simple
collection of the native component files. It has some minor performance advantages over .mxf
and can be useful in certain applications. It is not recommended in applications where there are
many subclips created as the files contain all of the data regardless of the settings of the head and
tail pointers. A four second clip taken from a 1 hour file will contain the entire hour of data.
In automation controlled systems that create subclips by reference to a single master file, this is
the preferred file type to use for mirroring content between servers or to backup storage. It is also
the format used by Telestream Flip Factory to transcode files to and from the MAXX server.
The performance advantages are only significant when the system is being used near its
maximum capacity (of both channel use and clip bit rate) and FTP transfers are required. While
.mxf is interleaved, .vfc carries the video, then the audio, then the ancillary data. This means that
only one file is read or written at a time, and the processor does not need to deal with the
interleaving of the data.
MOV (.mov)
MOV-wrapped graphics can be imported and rendered for playback as JPEG-2000 files.
Animation sequences to be sent to the MAXX-1200 should be saved in Uncompressed
QuickTime format. An alpha channel may be present.
Clips may be up to 1 minute in length .
(Note that this is program dependent, video with low detail or partial coverage (such as lower
thirds) may be able to run longer.)
IMPORTANT
Note that when Exporting from some NLEs such as Final Cut Pro, you must Export to a storage
volume that is considered a Macintosh volume in order to create compatible .mov files that are
over 2GB. This can be an issue when attempting to Export directly to network storage locations.
In practice this amounts to a maximum clip duration of about 5 seconds. If this is exceeded the
file will fail during the render when sent to the MAXX HD.