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, but tinyclip primarily exposes resolution, 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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