If your captions don’t match the spoken audio, or the video feels slightly delayed or ahead of the subtitles, this is usually caused by a non-standard video encoding format.

Minvo relies on standard web-safe codecs. When a file uses uncommon encoding settings, it can cause sync mismatches during processing.

Why This Happens

Audio and caption sync issues typically occur when:

The video was exported with a non-standard codec (such as mp4v)
The file uses a variable frame rate (VFR)
The encoding format is not optimized for web-based video platforms
The video was recorded in HDR (which can alter internal processing)

✅ How to Fix the Issue

1️⃣ Re-Export the Video Using Standard Settings (Recommended)

Action:

Re-export your video using:

Format: MP4
Video Codec: H.264 (libx264 recommended)
Audio Codec: AAC
Frame Rate: 24, 30, or 60 FPS (constant frame rate preferred)

Why:

H.264 + AAC is the industry standard for web platforms and ensures proper audio alignment during processing.

2️⃣ Check the Video Codec

Action:

Inspect your file’s codec settings.

If the codec shows as "mp4v", re-export using "h264" or "libx264" instead.

Why:

mp4v is less compatible with modern web processors and may cause desynchronization between audio and captions.

3️⃣ Use a Video Converter (If You Can’t Re-Export)

If you don’t have access to the original editing software, convert your file using:

HandBrake (Free – Windows & Mac)
Adobe Media Encoder
FFmpeg

Action:

Convert the video to:

MP4
H.264 (libx264)
AAC audio

Then re-upload the converted file to Minvo.

Why:

This standardizes the encoding and resolves most sync-related issues.

4️⃣ Disable HDR Before Recording (Future Prevention)

If you’re recording new content:

Action:

Turn off HDR (High Dynamic Range) in your device settings before recording.

Why:

HDR can alter color encoding and internal metadata, which may interfere with Minvo’s processing and lead to visual or sync inconsistencies.

💡 Pro Tips

Avoid exporting with Variable Frame Rate (VFR) — use Constant Frame Rate (CFR).
Use “YouTube 1080p” or “Web Export” presets when available.
If possible, avoid screen recordings that auto-adjust frame rates dynamically.