How to Compress a Video That Is Too Large to Send
Attachment limits vary by product, region, account, and sending method. The compression logic is stable: remove unused duration, reduce unnecessary resolution, increase compression, and remove audio only when sound has no value.
Four major drivers of file size
| Factor | How to reduce it | Main cost |
|---|---|---|
| Duration | Remove unused beginning/end | Less content, but highest efficiency |
| Resolution | Reduce 4K/1080p to 720p | Less detail when enlarged |
| Encoding quality | Raise CRF | Blocks, banding, and detail loss |
| Audio | Lower bitrate or remove | Lower sound quality or silence |
Frame rate and visual complexity matter too: capping a 60fps screen or gameplay recording at 30fps usually saves a lot. tinyclip exposes target size, resolution, a frame-rate cap, CRF, encoder speed, and audio controls. Begin with explainable, reversible choices instead of pushing every setting down at once.
A three-pass compression plan
- Pass one: Balanced (CRF 23), longest edge 1280px, audio retained.
- Pass two: if still above the target, choose Smallest (CRF 30) and keep 720p.
- Pass three: if the clip genuinely needs no sound, use Custom and Remove audio; only then consider 480p.
Why 720p is a useful sharing starting point
A phone chat window or email preview rarely displays a 4K or 1080p video at full desktop size. Reducing it to 720p removes many pixels from the encode while remaining useful on a phone. Keep more resolution for screen recordings with small type, evidence that must be zoomed, or footage intended for a larger screen.
tinyclip scales the longest edge proportionally, so portrait and landscape material preserve aspect ratio rather than stretching.
Final checks before sending
- Beginning and ending are intact; audio and video remain synchronized.
- Faces, subtitles, and fast motion are readable.
- The recipient can play MP4 with H.264 video and AAC audio.
- The filename explains what the clip contains.
- The important master remains safely stored elsewhere.
References
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