How to add laugh tracks and comedy music to a video

Last updated 2026-08-16 · 6 min read

What is the short version?

Comedy timing is the whole job. A laugh that fires half a second late reads as a mistake, and a laugh that fires on the wrong line reads as sarcasm. Everything else about this format — the music, the captions, the crop — is easy by comparison.

1. Go to Vizard Agent and give it the video, or a link to it.
2. Ask for laugh tracks, comedy music and animated captions on the funny beats.
3. Say how long the clips should be and which feed they are for.

What do you need before you start?

The footage and a sense of what is meant to be funny in it. Vizard Agent will find the jokes on its own from the words and the faces, and telling it what kind of comedy this is saves it from treating a deadpan delivery as a serious moment, which is the one thing the transcript alone cannot settle.

• The video, or a link. Vizard Agent downloads from a link and works from the file either way.
• The kind of comedy. Studio sitcom, meme energy, dry and deadpan. This decides which laughs get used.
• The clip length. Thirty seconds is the common target for a feed cut out of longer footage.
• Whether you want captions. Animated captions with emoji are a big part of this format and they are worth asking for explicitly.
• The language. Vizard Agent works in any language, and it checks which fonts on the system can render your script before burning text.

What do you type into Vizard Agent?

Say what treatment you want and how long the pieces should be. Vizard Agent works out where the jokes are from the transcript and the frames, so the useful instruction is about the finish rather than about the moments, which it locates on its own.

Prompt

Variants worth knowing:

• One clip or many. Ask for eight to ten short cuts from a long video and Vizard Agent indexes the whole thing first.
• Music only, no laughs. A canned laugh is a strong stylistic choice, and some footage is funnier without it.
• Emoji captions. Say so; Vizard Agent will style the captions to match the comedy rather than as plain subtitles.

What does Vizard Agent actually do?

Here is the order Vizard Agent worked in on a real comedy cut. The interesting part is that it never estimates a timestamp — it searches the word-level transcript for the word that starts and ends each joke and cuts to those numbers.

1. Downloads the video and probes its length and specs.
2. Extracts the audio as a small file so it uploads and transcribes faster than the video would.
3. Runs word-level transcription to find the jokes and the exact moment each lands.
4. Extracts frames and looks at them to see the expressions and what the joke is about.
5. Searches the sound library for comedy music and studio-audience laughs.
6. Writes a small script to trim the word-timing file to each clip's range.
7. Searches the timings for the keyword that opens the joke, and for the one that opens the next joke to find the end.
8. Re-cuts the clip to those exact numbers rather than the round ones it started with.
9. Lists the system's font families before burning any text, then renders one test frame and looks at it.

Steps 7 and 9 are the craft. Vizard Agent found a clip boundary by searching for a spoken word rather than scrubbing, and it checked one burned frame with its own eyes before committing to a full render.

What does the result look like?

From the run this page is written from, probed on the delivered file: 1080x1920, H.264, 30fps, 30.0 seconds, AAC audio. Vertical and exactly thirty seconds, cut out of a much longer source, with music, laughs and burned-in animated captions all in the delivered file.

Ask for several clips in the same conversation and Vizard Agent reuses the transcript and the sound effects it already has, so the second clip costs a fraction of the first.

It is not instant, and this category was not separately measured. Comparable work runs a median of 28 to 38 minutes end to end. Across all projects the median cost by tier is Flash 47, Pro 55, Max 242, Ultra 263 credits.

When does this not work well?

A laugh track is an opinion about what is funny, and it is the fastest way to make something unfunny feel worse. Vizard Agent places the laughs precisely on the beat the transcript shows, and precision is not the same as being right about whether a line deserved one.

• A laugh on a line that is not funny is painful. Say if you want them sparse. Fewer, better placed, is almost always stronger.
• Overlapping dialogue defeats the timing. If people talk over each other the transcript blurs, and so does the placement.
• Canned laughter dates the video. It reads as a deliberate retro choice, which is fine if you meant it.
• Music can bury the joke. Vizard Agent mixes the bed under the speech, and a busy track still competes with a quiet punchline.
• Comedy does not translate cleanly. A cut that works in one language may need different beats in another, and the timing has to be rebuilt rather than reused.

How do you fix a result that came back wrong?

Name the moment or the treatment. Vizard Agent keeps the transcript, the word timings and the sound files it downloaded, so moving a laugh or thinning them out is a timing change rather than a rebuild, and it happens against numbers it already measured.

• "The laugh at the end is too early." A shift against the same word timings.
• "Fewer laughs, keep the music." Vizard Agent thins them without touching the bed.
• "Make the captions bigger." A caption restyle over the same cut.

How does Vizard Agent compare to doing it yourself?

By hand this is scrubbing a long video for the funny bits, dragging a laugh sample onto a timeline, and nudging it frame by frame until it feels right. The nudging is where the hours go, and it has to be redone every time you move the cut.

Common questions

Does it choose the funny moments itself? Yes. Vizard Agent reads the transcript and looks at the frames, and you can name a moment if you want a specific one.

Can it work from a link? Yes. Vizard Agent downloads the video and works from the file.

Will the captions match the speech exactly? Yes. They come from the same word-level timings used to place the laughs.

Can it make several clips from one long video? Yes, and it is cheaper than asking one at a time because the transcript is done once.

Does it work in languages other than English? Yes. Vizard Agent transcribes in the source language and checks the available fonts before burning captions in it.

Can I have music without the laugh track? Yes. Say so in the brief, and Vizard Agent scores the cut without the audience.