15.3. Timeline, Viewing, and Playback

After opening media files, you can view images, playback video, etc. The corresponding controls are mainly located on the playback control panel at the bottom of the Mirada window.

This window contains a timeline and tools for viewing images and documents, as well as video playback controls. Timeline displays not only the active element of the playlist, but the whole playlist at once. Thus, the timeline is shared by all consecutive media files and these media files are also played back sequentially and continuously one after the other.

In addition, the appearance of the timeline and the set of tools above it may vary depending on the type of active file.

The simplest version is displayed when viewing individual images, when only the buttons for navigating to neighboring files in the playlist and the ability to navigate through the comments are available.

_images/mirada_il_tline_img.png

If a multi-page document is currently active (for example, a PDF file), the timeline displays this file page by page and adds buttons for navigating inside the document.

_images/mirada_il_tline_pdf.png

If you activate a video file, the timeline will display the video playback time or individual frames, depending on the video length and the display scale.

_images/mirada_il_tline_mov.png

In playback mode, the timeline can be zoomed by the mouse wheel or the slider on the screen, which allows you to position the cursor precisely to the desired video frame. You can press and hold the middle mouse button to drag the timeline.

In addition, the toolbar displays the following controls in this mode:

  • Playback controls that contain the traditional set of buttons: play, move forward/backward between frames, skip to timeline labels (i.e., the nearest frames containing comments), and skip to the next/previous playlist item.
  • The left part of the panel displays the current frame number and timecode, and you can click on the timecode to switch between the direct and reverse counter of frames of the media file and timecodes.
  • A button for editing the “tails” of video files (see the “Cutting “tails”” section).
  • A loop playback button (see the “Video looping” section).
  • A button to control the Onion Skin mode (see “Creating onion comments” section).
  • The right part of the panel displays a volume control and a mute button.
  • Buttons for controlling the marker in the Comparison mode (see the “Comparing Media Files” section).

15.3.1. Cutting “tails”

Mirada uses a concept known as the “tails” of videos, meaning you can delete the beginning and end to remove unnecessary frames when viewing and playing back a video file.

You can customize the “tails” for each individual file in the playlist using the buttons located directly in the Lista window, these buttons are displayed next to each list item containing a video file.

_images/mirada_il_tailcut.png

The newly opened window allows you to specify the number of frames to be cut off at the beginning and end of the video. After that, the cut-off frames are not displayed when playing the media file, and they are also not available when using the frame-skip buttons, although the timeline displays the unchanged file length.

If you want to set the same parameters for cutting the tails for all playlist items at once, you can click the button on the video playback control panel to the left of the timeline. In this case, you will set the default settings for all media files in your list.

15.3.2. Video looping

If you click the button on the playback control panel to enable video looping, the timeline will display a range of frames that will be repeated cyclically.

_images/mirada_il_loop.png

You can set this range using the mouse. This range may include frames from adjacent media files in the playlist. After video playback starts, the selected range of frames is played back cyclically.