Turn a PowerPoint deck into a presentation video automatically

Split a long line into sentences

An automatic draft may put a slide’s whole explanation into one long line. After splitting, only the line you change is recreated.

The example is a five-slide briefing deck on the benefits of a generative-AI chat platform for small and midsize companies. It is a sample report produced by DeepResearch in Bestllam (https://bestllam.com), our own service, loaded as it is. The presenter is Sophia.

In this example we did the same on all five slides, giving 23 lines in total. In the track editor each line becomes its own clip.

4 stepsActual product screenshots

BEFORE YOU START

Before you start

Prepare the PowerPoint file (.pptx) you want to turn into a video and open the MotionVox home screen. The tutorials in this chapter follow the same five-slide deck.

Screenshots show actual sample projects. Instructions describe desktop browser operation; this guide can also be read on a phone.

STEP01

Split a long line into sentences

The automatic script makes one long line per slide. Splitting it into sentences lets you fix each sentence and keeps captions readable.

  1. Click ⋯ at the upper right of the script.
  2. Click Split lines at each full stop in the menu.
  1. Action Click ⋯ at the upper right of the script.
  2. Action Click Split lines at each full stop in the menu.
The ⋯ menu of the script opened on slide 2.

Check This applies to the slide that is open. To split other slides, select each on the left and repeat. We split all five slides in this example.

STEP02

Check the split lines

After splitting, each sentence becomes its own line with its length in seconds. The figure shows slide 2 split into four lines.

  1. Check that lines 1 to 4 are listed: 1.9, 6.2, 5.4 and 8.8 seconds in the figure.
  2. Check the expected total length under Estimate at the upper right.
  1. Check Check that lines 1 to 4 are listed: 1.9, 6.2, 5.4 and 8.8 seconds in the figure.
  2. Check Check the expected total length under Estimate at the upper right.
The script of slide 2 split into four one-sentence lines.

Check Right after splitting, narration for the new lines is recreated; it took a few seconds here. After splitting all five slides there were 23 lines and the estimate was 3:20.

STEP03

Split the other slides the same way

Splitting is done slide by slide: select a slide on the left and use the same menu. The figure shows slide 1 after splitting.

  1. Click the next slide to split in the list on the left.
  2. Check the lines after splitting. Slide 1 became four lines, such as a 1.5 second greeting and a 5.8 second sentence, each with its own length.
  3. Check the total length under Actual length at the top: 3:20 after splitting all five slides.
  1. Action Click the next slide to split in the list on the left.
  2. Check Check the lines after splitting. Slide 1 became four lines, such as a 1.5 second greeting and a 5.8 second sentence, each with its own length.
  3. Check Check the total length under Actual length at the top: 3:20 after splitting all five slides.
Step 4, Slides and script: slide list on the left, preview in the middle and the four lines of slide 1 on the right.

Check Splitting adds a short pause between sentences, so the total grows slightly: from 3:07 to 3:10 after slide 2 here, and to 3:20 after all five. The figure was captured after the video was finished, so the label at the top reads Actual length instead of Estimate.

STEP04

Each line becomes a clip in the editor

When the project reaches the track editor, each studio line appears as one clip. The figure shows the track editor opened after this example was finished.

  1. The Presenter audio row holds one audio clip per line, starting with the greeting and then each sentence.
  2. The Presenter row holds the footage clip (Sophia) for each line.
  3. The Captions row also holds one caption clip per line.
  1. Check The Presenter audio row holds one audio clip per line, starting with the greeting and then each sentence.
  2. Check The Presenter row holds the footage clip (Sophia) for each line.
  3. Check The Captions row also holds one caption clip per line.
The track editor just after opening: rows for captions, caption band, presenter, presenter audio, emphasis, slides and background.

Check With one clip per sentence you can also recreate just one sentence in the editor. The editor is covered in “Finish in the track editor and save the MP4”.

BEFORE YOU FINISH

One final check.

You are done when each sentence has its own line and length. Continue with “Rewrite a line”.

Scroll the enlarged image to explore