VBrick Systems Portal Server ETV v4.2, Руководство пользователя

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Using the Portal Server
ETV Portal Server User Guide 25
Playlists
Playlists are saved in the
Asset Library
. A playlist is a mechanism to consolidate
multiple video files, or video file segments, regardless of format, into a virtual file. A playlist
is a list of video streams, or parts of streams, that can be played as if they were a single video
file. Playlists can include files encoded in different formats and at different bit rates including
MPEG-1, MPEG-2, MPEG-4, and WM (Windows Media). Playlists have a special icon and
are only created from stored streams. They are not available with live streams and they are
not available when multiple windows are displayed. (Playlists and bookmarks are supported
on WM IP Receivers; they are not supported on standard set top boxes or Amino set top
boxes.)
You create a playlist from the
Playlists
page and they can be saved under any name and
played back later. They can also be modified, re-ordered, or changed in a variety of ways as
explained below. Playlists can only be played in realtime. They cannot be scheduled in the
Portal Server to run at a later time. Bookmarks are slightly different. A bookmark is simply a
pointer to a specific location in a file or to an entire file. In general, you can think of a
bookmark as a playlist with a pointer to one segment in a video. You create bookmarks using
the
Mark
button in the preview window. For more information, see Creating Bookmarks on
page 19. Note that if the computer you are using to access a playlist does not support a
certain encoding type, a bookmark to that item in the playlist will not be displayed.
Playlists are saved by default in the MyMedia folder.
A
MyMedia
folder is automatically created for each
defined user and is available and viewable only to the
user who is currently logged in. If Access Control is
enabled, each user has their own
MyMedia
folder
which no one else can access. If Access Control is not
enabled,
everyone's playlists are stored in
MyMedia
.
T
To run an existing playlist:
1. Click on the
Asset Library
and navigate to the
MyMedia
folder or to any folder that has a playlist.
2. Click on any item with a playlist icon to launch the
playlist in the preview window.
3. Use the
Previous
and
Next
buttons to move up
and down the playlist. (Use the
Forward
and
Rewind
buttons to navigate to the beginning or
end of the clip in progress—not to the beginning
or end of the playlist.)
There may be a slight delay between clips—this is
normal Portal Server behavior as the video loads. If
any content in a playlist is unavailable for any reason (for example the file was moved or the
content expired), the Portal Server will skip that clip, advance to the next clip, and display an
informational message. below the preview window. As explained below, there are two ways to
create playlists. You can quickly bookmark a stream playing in the preview window using the
Mark
button; this creates a playlist with one bookmark. You can also create a playlist from the
Playlists
page. This is the standard way to create a playlist.