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SHARED FEATURES

Playlists

The dominant feature of all of TriCaster’s Media Players is a storyboard-style playlist, used to organize content for use during live productions.

Figure 118

This arrangement offers easily visible thumbnail icons for each entry.  A scrollbar at right accommodates long playlists when necessary.  Icons in the playlist can be re-ordered quickly and easily using the familiar drag and drop workflow.  The playlist can even be altered during playback (of course, if the currently playing item is removed, playback stops immediately). 

An Alias (by default, the item’s filename) is displayed below the icon, along with the item’s duration.

Hint: The duration shown is the play time after trimming, and thus may be less than the file length on disk.  In such cases, the In and Out markers on the Scrub Bar (spanning the width of the playlist immediately below it) show the effect of trimming operations, while the full width of the Scrub Bar depicts the total length of the file on disk.

Automatic Clip Trimming

Clips (but not stills, or titles, for reasons that will become apparent) added to a playlist are automatically trimmed to accommodate the addition of transitions between clips when necessary.

(Otherwise, i.e., if there are no ‘un-used’ frames to display during a transition, motion will appear ‘frozen’ during the transition, which is usually undesirable.)

To reset a clip to its full file-length boundaries, select it and press the ‘g key (multi-selection is supported, too).

Clicking an item selects it.  The play position is automatically set to the In Point on selection.  Standard Shift + click and Ctrl + click multi-selection operations are supported, and all selected items are denoted by a white border around their icon.

When a Media Player is stopped, its output to video monitors tracks selection and trimming operations.  The current item is the Media Player’s output, and in consequence appears on monitors dedicated to the player, if any.  Of course, only one item can be displayed on output at a time; the frame surrounding the thumbnail icon for the currently displayed item is illuminated.  Double-clicking a thumbnail (or clicking the Play button) begins playback from the In Point of the current file. 

Hint: Double-clicking elsewhere in the playlist pane opens the Media Browser (hold down shift when clicking to open a system file explorer instead of the custom Media Browser).

Note that even still images and static title pages added to the playlist are given a play duration.  The default duration for these items is five seconds.  Duration can be adjusted on an item by item basis (or as noted earlier, en masse for multi-selected stills or title pages).

During playback, the footer of playlist items illuminates as each is played in turn.  When necessary, the playlist pane scrolls to display the icon for the currently playing item.  A progress bar is displayed beneath the currently playing thumbnail, and the Scrub-Bar knob also tracks playback progress.

Hint: Selection status is independent of which clip is playing.  Selected items have a white border in the Playlist pane.

File Operations

  • Click the large + (Add Media) button at left beneath the playlist pane to open a custom Media Browser (see Section 11.2.2). Alternatively, double-click in an empty part of the Playlist

Note: Add Media also supports compatible third-party asset management systems.  Hold down the keyboard Ctrl key when clicking the + sign to access these tools.

  • Newly-added files become selected items in the Playlist
  • Drag (appropriate type) file(s) from one module’s playlist to another module.
  • Right-click in the playlist pane to show a menu with context-relevant items from the following list (operations affect selected playlist items):
    • Cut
    • Copy
    • Paste
    • Remove
    • Split at Current Frame

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  • Audio Level (clips with sound and audio icons) – note that the default ‘per-clip’ audio level applied to imported media files can be set in the Dashboard Options
  • Duration
  • Speed
  • Angle
  • Automation
  • Use Current Frame as Icon
  • Edit Title
  • Properties

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  • Add to Publish Bin – see Section 18.3.
  • Send to > Buffer n (Still image and title icons – see Section 11.4)
  • Standard Cut, Copy, Paste and Delete keystrokes are supported for playlist entries.
  • Un-playable (missing, corrupt, or unsupported) file icons are dimmed.

Hint: Multi-selection is supported for most operations, including Set Duration (applies to Still and Title only).

Most of the clip context menu items are self-explanatory, but let’s talk about a couple of them in just a bit more detail.

Speed               

The playlist context menu item Speed permits you to give each clip a custom playback speed.  It’s important to realize that this Speed setting is separate from the Media Player’s primary Speed control, located in the footer, below the scrub bar.  The latter setting applies to all playlist items. 

Both Speed settings are applied during playback.  So, for example, if you play a clip with both Speed values set to 50%, the actual playback rate will be just 25%.

Automation

We’ve discussed elsewhere in this Guide (Section 8.1.5) how you can assign macros to any Switcher source, including Media Player.  Beyond this, though, the playlist context menu item Automation allows every item in a playlist – every clip, still image, audio file or title page – to control its own unique macros. 

  • Any macro you can record or create can be executed automatically on either playback or end of play for any and every individual playlist item.
  • Multi-selection support in the playlist makes it a breeze to assign macros to multiple items.

Hint: You can use this capability, for example, to automatically show titles for certain types of clips and not others, give them different title page types, selectively adjust Proc Amps or apply LiveMatte keying automatically when needed for only certain items.

Properties
Display Name

The Properties panel allows you to edit the Display Name for a file in the playlist. The name fields defaults to the filename, but is actually a local alias, or ‘nickname’.

Editing the name does not actually change the name of the file on your hard drive.  Roll the mouse over the icon display name to see the true filename and its path.

Comment

The Comment box permits to enter metadata to associate with the file. 

Hint: Both the Display Name and Comment box content for the selected clip are available as DataLink keys, which can in turn be served to live title pages or supplied along with the file to the Publish module.

Figure 119

Trimming Clips and the Scrub Bar

Just beneath the playlist pane is a full-width Scrub-Bar (Figure 120).  The width of the scrub-bar represents the full run time of the current clip or other media file.   Drag the knob left or right to change time position in the current playlist item.

Figure 120

Time-Shifting

By the way, it’s possible to use growing clips to ‘time shift’ your program:

·         Initiate Recording.

·         Add the captured clip to a DDR

·         Press “g” on the keyboard to clear its Out Point.

·         Trim the In Point to taste.

·         Assign the DDR to an output.

·         Wait some length of time, and begin playing the clip.

·         (Of course, all of this could easily be performed by a macro, too.)

In and Out Points for newly added Media are automatically adjusted when necessary to accommodate motion when transitions you add require it.

  • To reset the file to its full length, press the ‘g’ key.
  • To trim a clip manually, move the knob to the desired frame and press ‘i’ or ‘o’ on the keyboard (to set the In Point or Out Point, respectively).

During playback, the Scrub-Bar knob traverses the span between the In and Out Points.  The duration (taking into account trimming operations) is displayed as a countdown in the upper of two timecode fields at left (Figure 120). The lower time display shows embedded clip timecode.

Hint: For longer durations, holding SHIFT while dragging the scrub bar knob increases precision

Figure 121

It’s useful to note that (Quicktime only) clips that are still being captured continue to ‘grow’ even after addition to a DDR playlist (see Section 11.2.2). 

These growing clips, featuring the red ‘recording’ overlay (Figure 121) can be freely extended beyond the bounds of the ‘in’ and ‘out’ points they were given when initially added.

It can be very useful to recall that you can easily split clips using either the corresponding context menu item, or the “/” key.

Alpha Channel Support

For files with transparency such as 32bit image files, use non-premultiplied (or ‘straight’) alpha channels in TriCaster’s Media Players.  Premultiplied files will not give the correct results when overlaid on other imagery.

Hint: Monitors can optionally show a checkerboard pattern behind transparent content.

TriCaster Advanced Edition Media Players likewise support alpha channels. 

SECTION 11.2.1

For more information please download the entire document at new.tk/rt-m

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