Clipchamp is not malfunctioning in this scenario; the larger export size is a result of how video encoding and Clipchamp’s defaults work.
A video’s file size is determined by frame rate, bit rate, resolution, duration, and the video/audio codecs in use. When a Teams recording is brought into Clipchamp and exported, the output can be much larger than the original for several reasons:
- The Teams recording is already efficiently compressed
- If the source (Teams) video uses a more efficient codec or lower bit rate than Clipchamp’s export settings, Clipchamp cannot compress it further and may actually increase the size.
- Exporting at higher resolution than the source
- If the Teams recording is, for example, 720p but the Clipchamp export is set to 1080p or 4K, the output file will be larger even if the visual quality does not improve.
- More complex edited output
- Adding overlays, images, titles, extra audio tracks, or other elements increases the amount of data that must be encoded, which increases file size.
- Higher default frame rate/bit rate
- Clipchamp’s default export frame rate and bit rate can be higher than those of the original Teams recording, which directly increases the resulting file size.
To reduce the exported file size when working with Teams recordings in Clipchamp:
- Pre‑compress or convert the source
- Use a converter/compressor before editing. There are free tools (for example, Handbrake for video, Audacity for audio) that can reduce bit rate and keep quality acceptable.
- Convert videos to MP4 and audio to AAC/MP3; even if already in these formats, re‑encoding at lower bit rates can reduce size without obvious quality loss.
- Then use these smaller versions as inputs in Clipchamp and export again.
- Match or lower the export resolution
- When exporting from Clipchamp, choose an output resolution that is not higher than the original Teams recording (e.g., 480p or 720p instead of 1080p/4K) to keep file sizes down.
These behaviors are by design based on encoding parameters rather than a bug, and the available mitigation is to adjust input compression and export resolution/bit rate as described.
References: