Video <video>

<article>
    <video controls autoplay muted loop>
        <source src="my_video.mp4#t=8,10" type="video/mp4">
    </video>
</article>

• Due to the <source> URL, only the portion between 8 s – 10 s gets played.
• The <video> tag benefits from standard attributes like loop, muted, autoplay and controls (so that controls are visible). In Chromium-based browsers, only a muted video respects autoplay, so we recommend using controls too so that you may start the video with Space.
• When a new frame appears, the first video gets focus. If autoplay is present, it starts playing. Keys like Space, Left, Right stop working for frame switching to avoid interfering with the video controls.

sli-datetime

File modification time, if available. Like sli-thumb, it inherits from ancestors (<article>, <section>, <main>) – the closest element wins, so it may be set once on an <article> even without a nested <img>/<video>.

sli-playback-rate

The speed of the video.

Tip

Can be adjusted by Numpad +/- while presenting (see the menu – Esc).

<article> <!-- fast video -->
    <video src="my_video.mp4#t=8,10" sli-playback-rate="4"></video>
</article>
<article sli-playback-rate="0.7">  <!-- slower video -->
    <video src="my_video.mp4#t=8,10"></video>
</article>

sli-video

(default 'autoplay controls') All <video> tags inherit its value as attributes (autoplay controls muted loop).

Tip

Toggle muted by Alt+M while presenting.

<article sli-video="autoplay muted">
    <video> <!-- becomes <video autoplay muted> -->
        <source src="my_video.mp4#t=8,10" type="video/mp4">
    </video>
</article>
<article>
    <video src="my_video.mp4"> <!-- becomes <video autoplay controls> because that is the default --></video>
</article>
<article>
    <video sli-video='muted' src="my_video.mp4"> <!-- becomes <video muted> --></video>
</article>
<article>
    <video muted src="my_video.mp4"> <!-- becomes <video autoplay controls muted> --></video>
</article>

sli-video-cut

Browsers allow you to specify the playback range with a #t=[START],[STOP] URL suffix. Should you wish to change the value dynamically, you may set it as sli-video-cut.

Example: <video src="myvideo.mp4#t=10"></video> will start playing at time 10 s.

Use the property panel (Alt+P) to help you, or mark the start/end while the video plays: Alt+, sets the start to the current playback time, Alt+. sets the end. Both are undoable (Ctrl+Alt+Z).

sli-video-points

An array of events that happen during video playthrough. The format is [startTime, rule, rule...].

The first item is the startTime when the other rules happen. Rules are as follows:

• goto:[time] – Where to jump. Ex: [10, "goto:50"] means: at time 10 s, jump to time 50 s.
• rate:[s] – Ex: [10, "rate:.5"] means: at time 10 s, slow down to half.
• mute – Toggles to muted sound.
• unmute – Unmutes sound.
• pause – Video stops.
• point:[sli-step-point] – Zoom to a point. This is defined by a standard sli-step-point. Ex: [4, "goto:2.9", "point:[100,100,5]"] means: at time 4 s, jump back to time 2.9 s and zoom to a given point.

Marking points while watching

Alt+V marks a point at the video's current playback time, even while the properties panel is closed. Since the rules above cannot be guessed from what the video happens to be doing, it pauses the video and asks:

• At time – the moment the point applies to, prefilled with the current playback time.
• jump to (goto), playback rate (rate), pause, Sound (mute / unmute) and zoom to (point) – the rules the point carries. The rate/sound are pre-filled only when the video really differs from what the previous points have already put in effect, so a rule is never repeated for nothing; the zoom is pre-filled from the current view when you zoomed in before marking.

Confirming adds the point and – if the video was playing – resumes it, so marking a series of points does not interrupt the watching.

Cutting a video into excerpts

A cut takes two times: when to jump away and where to. So when the point just before is still waiting for a target, the dialog offers to fill in its goto instead of adding a point of its own – and picks that by default when that previous point carries nothing but its time. Mark the end of a boring part, then the start of the next interesting one, and the pair becomes [5, "goto:41"].

The dialog also offers Zoom live, which hands the new point straight over to the editing below.

Shift+Alt+V skips the dialog and marks a bare point, snapshotting whatever the video is doing at that moment (the pre-1.3.0 behaviour of Alt+V).

Editing a point afterwards

Clicking an existing point – in the property panel (Alt+P) or on its 🎬 pill in the top-right corner (see Seeing the points without the panel) – does not open any dialog: the video pauses at that very moment and the point's rules appear right below its pill, so you tune them with the moment they describe still on screen. The row holds the time, jump to, rate, pause, the sound and the transition-duration of the zoom, plus a remove button; double-clicking the pill removes the point outright. Times go to the hundredth of a second, so a cut lands on the frame you mean. Every change is undoable (Ctrl+Alt+Z) on its own.

While a point is being edited this way, the video follows it: zoom/pan/rotate the video and the view is written into the point's point: rule. Click the pill again (or anywhere outside) to finish – the playback resumes where it was interrupted. Drag a point onto another one to reorder them.

The point has no duration, unlike an sli-step-points one: a video point does not end, the video itself decides when the next point comes.