How to dub a video with your own voice

• Start and stop with the on-screen mouth. Timing matters more than matching every syllable.
• Closed-lip sounds like B, P, and M are the most visible sync points.
• Adapt lines to fit the length and rhythm of the original, not just its meaning.
• Match the physical energy of the scene: distance, effort, and movement.
• Record line by line, check sync, and re-record instead of stretching audio heavily.
• Use footage you have the rights to if you plan to publish the result.

Dubbing means replacing or adding dialogue on a video with a new recording. It comes in three common forms. Lip-sync dubbing replaces a character's lines so the new voice appears to come from their mouth, as in localized films and anime. Voice-over lays a new voice on top, often with the original faintly underneath, and does not try to match lips. ADR replaces dialogue within the same production, usually because the original audio was unusable.

For practice and fan projects, lip-sync dubbing is the most demanding and the most rewarding. It forces you to act with precise timing, a skill directors value in every kind of voice work, and most of this guide focuses on it.

ADR stands for automated dialogue replacement, sometimes called looping. In a professional session, an actor watches a short section of picture, called a loop, and re-records a line in sync. A common cue is a series of beeps, often three, with the line starting where a fourth beep would fall. The actor runs the loop several times until performance and sync both land.

Several ADR habits are worth copying at home. Work in short loops of one line or a quick exchange. Watch the original performance first and borrow its rhythm and energy. Match the perspective: a character shouting across a field should not sound like someone murmuring into a mic. And record a few seconds of your room with nobody talking, called room tone, so gaps can be filled smoothly.

Pros also record wild lines, which are extra lines recorded without picture, such as an off-screen shout or a background reaction. In your own dubs, moments where a character is off-screen or facing away give you more freedom, so use them when you need to fit in extra words.

Watch the clip several times with sound, then once on mute. On mute you see the mouth movements without being pulled along by the original voice. Note where each line starts and ends, where the character pauses, and where the lips close fully.

If you are writing new lines, translating, or doing a parody, adapt for length and rhythm first. A new line should have roughly as many syllables as the mouth movements and should put closed-lip sounds where the lips actually close. Write it out as a simple table of line number, character, time in, time out, and text. For longer narration-style dubs, the words-to-minutes calculator helps you check whether the script fits the clip.

The most visible sync points are closed-lip sounds: B, P, and M. If the character's lips press together, your line should have one of those sounds there, or at least a pause. Wide-open mouth shapes suit open vowels like "ah". You do not need to match every sound. Viewers mostly notice a voice coming from a closed mouth, or a mouth moving with no sound.

Start and end with the character. A line that begins late or runs past the last mouth movement looks wrong immediately, even if the middle is slightly off. If your line is too long, cut words rather than racing into a blur. If it is too short, add a breath, a small reaction, or a word that fits the rhythm.

Breathe where the character breathes. Watch the shoulders and chest; an inhale before a big line is often visible, and matching it makes the performance feel connected to the body on screen.

A perfectly timed line still feels wrong if the energy does not match. If the character is running, your voice should carry effort and breath. If they are across a room, project a little more. If they are leaning in close, drop your volume and get more intimate.

Do not forget efforts: grunts, gasps, laughs, sighs, and small reactions the original performer made. They sell the scene and fill the spaces between lines. Move your body a little as the character does, while keeping a steady distance from the mic. Your voice follows your posture more than you might expect.

The quickest way to practice is with a scene that is already set up for dubbing. In SceneDub Studio you pick a ready scene, read each line as it plays, and record it with your own voice. SceneDub then rebuilds the clip with your voice so you can watch the result and download it. There is no editing software to learn, and you don't need to sign up to start.

The prepared scenes are Creative Commons licensed, which matters if you want to share what you make: you are working from footage whose license allows reuse, as long as you follow its terms, such as giving credit. That makes the Studio a good place to build sync skills before you move on to harder material.

To practice on a specific clip, use the YouTube dubber. Paste a public YouTube or Shorts link that allows embedding and runs up to three minutes. The official YouTube player acts as your reference while you record in sync, and your microphone take stays separate, so you can review it against the video and download the audio.

Keep rights in mind. Recording your own voice for practice is one thing; republishing someone else's video with your dub on top is another, and it can infringe the owner's copyright. If you want to publish, use footage you own, footage you have permission to use, or Creative Commons material that allows adaptations.

If you take your audio into a video editor, give each character its own track and line up each take by its first syllable. Nudge in small steps, because a few frames can be the difference between convincing and off. If a take is badly out of sync, re-record it instead of stretching it, since heavy time-stretching sounds artificial.

The hardest part is often the original voices. Professional dubs use a music and effects track, called the M&E, which contains no dialogue. Without one, vocal-removal tools can help but usually leave artifacts. To place your voice in the scene, use gentle EQ and a touch of reverb only if the space calls for it, fill silent gaps with room tone, and keep dialogue clearly above the music and effects.

1. Watch the clip. View it several times with sound, then once muted to study the mouth movements.
2. Prepare the lines. Write or adapt each line to fit the timing, with closed-lip sounds where the lips close.
3. Rehearse with picture. Speak along with the video until starts, stops, and breaths line up.
4. Record line by line. Record each line in sync, matching the scene's energy and distance.
5. Check and re-record. Watch the result and redo any line that starts late, runs long, or feels flat.
6. Mix and export. Balance your voice with music and effects, then export the finished dub.