Audio is usually a smaller part of a video file than high-resolution picture data, but it still contributes to the final size. Speech, music and ambient sound each have different requirements.
Total size includes audio
A file’s total bitrate includes video and audio streams plus overhead. If you estimate using video bitrate alone, the actual file will be larger.
Preserve speech clarity
For interviews and lessons, check that consonants remain clear, volume is consistent and there is no clipping. A small file is not useful if the words cannot be understood.
Do not strip audio by accident
Canvas-based browser recording may not preserve source audio consistently across browsers. VideoCompact warns when its browser cannot capture audio. Check the exported file before using it.
A practical checklist
- Decide whether sound is essential.
- Check audio capture support before processing.
- Listen to the finished file with headphones.
- Compare size and clarity before sharing.
Common mistakes to avoid
- Assuming video recording APIs handle source audio automatically.
- Setting audio levels too high and clipping speech.
- Estimating size without audio bitrate.
Questions people ask
Can audio be larger than video?
For very low-resolution or short content, it can be a meaningful share, but video data is commonly larger.
Does VideoCompact keep audio?
It attempts to use the browser’s source audio capture. Browser support varies; verify the output.