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.
🚀 Still Experiencing Sync Issues?
If you’ve re-exported using the recommended settings and the issue persists:
Please contact Minvo Support and include:
Your export settings
The original file (if possible)
A short screen recording of the issue
We’ll help you identify the exact cause and get your video back in sync quickly.