Turn an audio into a video with subtitles
Voice note, podcast or recorded class: pick format, background and title, and out comes a video with bars that follow the voice and word-by-word subtitles.
Updated: October 2026 · 7 min read
To turn an audio into a subtitled video on Windows: install AppGrabbit, open Download › Subtitles with AI, drop the audio (or paste a SoundCloud link) and click Get subtitles: the AI engine transcribes on your PC, word by word (1 credit). Then pick the format (portrait, square or landscape), background and title on a real preview, free, and Make the video builds the MP4 with bars that follow your voice and the subtitles. 1 credit · the video: Pro
Why you want an audio turned into a video
Instagram, TikTok, YouTube and LinkedIn do not take a bare audio file. A podcast clip needs something moving so people stop; a voice note with a testimonial or an explanation becomes postable; a class recorded as audio can live on YouTube with subtitles for those who cannot hear. And whoever watches muted reads what is being said, word by word.
How AppGrabbit builds it
First it transcribes the audio on your PC with Whisper (whisper.cpp), asking for the timing of every word; on your NVIDIA card if you have one, on the CPU if not. That gives you the .srt, the .vtt and the .txt, which are yours already. Then it builds the video: a two-color background that drifts slowly (Night, Paper or Sky), the title at the top in the Poppins font with a small line showing the length (“AUDIO · 0:51”), bars that are the real spectrum of your voice (40 in portrait and square, 64 in landscape, mirrored), and the subtitles: in portrait and square, the Center style with the spoken word in yellow; in landscape, Classic at the bottom. Everything is rendered with FFmpeg on your PC at 30 frames per second, H.264 with AAC audio.
Formats and which network they are for
- Portrait 9:16 · 1080×1920 — Reels, TikTok, Shorts, stories. The default.
- Square 1:1 · 1080×1080 — the Instagram, LinkedIn and X feed.
- Landscape 16:9 · 1920×1080 — YouTube, presentations, a website.
- Time — 51 seconds of audio become a video in about 9 seconds on a PC with an NVIDIA card; the transcription, about 30 seconds per 10 minutes of audio (about 2 minutes on CPU only).
AppGrabbit against the other ways
| AppGrabbit | Audiogram websites | Canva and CapCut | A video editor | |
|---|---|---|---|---|
| Your audio never leaves your PC | ✓ Never | ✗ Goes to their servers | ✗ Uploaded | ✓ Yes |
| Subtitles timed word by word | ✓ Yes, from the AI | ~ Per sentence or paid | ~ Automatic, per sentence | ✗ You type them |
| Bars that follow the voice | ✓ Yes | ✓ Yes | ~ Templates | ~ With work |
| Ready in | A minute | Minutes, watermarked on free | A while assembling | An afternoon |
| Preview before paying | ✓ On your audio, free | ~ Watermarked | ✓ Yes | ✓ Yes |
| Cost | 1 credit (5 free a month) · video: Pro $8.99/mo or $3.99 pass | Free minutes with watermark, then a subscription | Free with limits, paid Pro | Free or paid, plus your time |
With an example
You recorded a 51-second voice note explaining why your service's price went up. You drop it in, the app transcribes it, you pick Portrait and the Night background, type “Why the price changed” as the title, click Make the video and nine seconds later you have a 1080×1920 MP4: your voice, the bars moving with it and every word lighting up as you say it. You post it to your stories or TikTok without opening an editor.
Step by step
- 1Install AppGrabbit for Windows — Download the free installer (everything included). Windows will say it protected your PC because the installer is not code-signed: click More info, then Run anyway.
- 2Open Download › Subtitles with AI and drop the audio — mp3, m4a, wav, ogg, opus, flac… the WhatsApp voice note, the podcast, the recorded class. A SoundCloud link, or a video link you only want the voice from, works too.
- 3Click “Get subtitles” (1 credit) — The app transcribes on your PC, word by word, and leaves .srt, .vtt and .txt in the Subtitles folder. The first time it gets the AI engine ready, once.
- 4Pick format, background and title on the preview — Portrait 9:16 for Reels, TikTok and Shorts; Square 1:1 for the feed; Landscape 16:9 for YouTube. Night, Paper or Sky background. The title sits at the top with the audio length. All free, on a real frame.
- 5Click “Make the video” (Pro or the 7-day pass) — Out comes an MP4 with the background, the title, bars that follow your voice and the subtitles with the spoken word lit up. Follow it until “Video ready” and “Open folder”.
- 6Post it where it belongs — 1080×1920, 1080×1080 or 1920×1080, H.264 with AAC audio: what Instagram, TikTok, YouTube and LinkedIn ask for. The MP4 also lands in the Library.
Frequently asked questions
mp3, m4a, aac, wav, ogg, opus, flac, wma and more; the WhatsApp voice note just as you save it from WhatsApp Web or Desktop. And a SoundCloud link, or a video link you only want the audio from.
Getting the subtitles (.srt, .vtt and .txt) costs 1 credit, and Free comes with 5 a month. Previewing with format, background and title is free. “Make the video” is for Pro (USD 8.99 a month) or the 7-day pass (USD 3.99, no renewal).
Yes. They are the audio's spectrum, not a looping drawing: the audio is leveled first so a whisper and a shout look even, and in silences the bars drop.
Not today: you choose between the Night, Paper and Sky backgrounds, a title and the format. That is on purpose, so it comes out right in a minute. If you need more, the .srt works in any editor.
The app tells you and gives the credit back. No speech means no subtitles, and the video this feature makes carries subtitles.
No. A one-hour podcast comes out the same; it just takes longer: about 9 seconds per minute of audio on a PC with an NVIDIA card, plus the transcription.
In the Subtitles folder, named after the audio plus “_subtitulos.mp4”, and in the Library. From the finished row or from the .srt, “Choose style” takes you back to the preview for another version.
Related guides
Turn your audio into a video, on your PC
Windows 10/11 · Get subtitles: 1 credit, 5 free a month · Make the video: Pro or 7-day pass