7 AI Voiceover Tips for Short Video Completion Rate

The voiceover is a short video's spine. These 7 tips come from real production, and each one is testable in the studio.

1. Write the script in seconds, not words

Normal pace is ~2.5 words per second, so a 30-second read ≈ 75 words. Count before generating — far cheaper than rewriting after it runs long.

2. Put an emotion tag in the first three seconds

The opening decides completion. Flagship model + [excited] or [curious] gives the first line a hook. The homepage live-selling sample opens with [excited].

3. Speed 1.05–1.1

Short video runs faster than broadcast. In advanced settings, set speed to 1.05–1.1 — denser, not rushed.

4. Match the voice to the account persona

Educational → steady (Daniel, Yun); lifestyle → warm (Laura, Jessica); reviews → neutral and clear (Alice, Matilda). Filter the library by the social_media use case.

5. Subtitles from timestamps, never by hand

Every generation ships character-level timing; download the SRT straight into CapCut — frame-accurate, zero adjustment. See the subtitle guide.

6. One script, many languages

After translation and proofreading, generate each language with a native voice (see multilingual accents); same footage, different audio and subtitle layers, multiple accounts.

7. Batch with long-form mode

Separate a week's scripts with blank lines and submit once to long-form mode: one file plus a full subtitle track, then cut by timestamp in your editor — much faster than one by one.