QuVIS Media Files
Files that contain video and audio data are commonly referred to as clips or media files. There are
several types of media files that can be created and played by QuVIS video servers. Determining the
type of media file to use is very important. Each media file type is constructed differently in order to
efficiently achieve the intended use of the content (video and/or audio).
Aside from the video and audio format of the media file, there are three settings that serve as the
foundation of a media file. These settings are: QuVIS Media Format (QMF), Maximum Data Rate (MDR)
and Clip Form.
QuVIS Media Format (QMF)
The QuVIS Media Format is a compatibility switch that identifies different file format standards used by
QuVIS video servers. There are currently two compatibility modes: QMF1 and QMF2.
QMF1 – This QMF setting is used to identify collapsed clips (interleaved video and audio) that
may be played by the first generation QuVIS video servers, the QuBit, running a QuVIS Soft
Release (QSR) of 1.x.
IMPORTANT!
The QuVIS Acuity, QuVIS Encore, QuVIS Ovation, and QuVIS Cinema Player do
NOT support the playback or creation of QMF1 content. QMF1 content may only be played and
created by previous generation QuVIS products running QSR 1.x or 2.x releases including the
QuBit ST, DS and EL. This legacy clip file format has built-in controls that limit the options
available for MDR, Metadata and Clip Form in order to maintain playback compatibility with
older 1.x QuBits.
QMF1 clip settings
•
MDR = Maximum of 30MB/sec
•
Metadata = Not supported
•
Clip Form = Collapsed only (interleaved video and audio)
QMF2 (default) – This default QMF setting is used to identify media files that may only be
created or played on QuVIS video servers running a QSR release of 2.x or greater, including
QSR 3.x. The QuVIS Cinema Player, Ovation, Encore, Acuity and QuBit product line (ST, EL
and DS) natively supports this QMF setting. QMF2 supports features that are tied to specific
levels of hardware (circuit cards) that are not available for 1.x QuBits.
QMF2 clip settings
•
MDR = 30 and 60MB/sec supported
•
Metadata = supported
•
Clip Form = Collapsed and expanded
Maximum Data Rate (MDR)
MDR is used to set the upper data rate limit of a media file to 30 or 60 MB/sec. These limits are set to
correspond to the bandwidth capabilities of the QuVIS video server that is recording the content or
intended to play the content. A 1.x QuBit for instance can only support a maximum date rate of
30MB/sec. Current products running QSR 2.x or greater support a maximum data rate of 60MB/sec.
Aside from the product model and system software version, another important element that determines
the ability to record or play MDR 60 content is the number of drives that make up a QuVIS storage
volume. A single-drive volume can only support a maximum data rate of 30MB/sec. Multi-drive volumes
(2 or more drives) will support MDR 60 and is capable of sustaining data rates of 60MB/sec.
QuVIS Encore
Page 52
QSR Version 3.1
