Most clips have a few seconds to lose: the moment before the action starts, the reach for the stop button at the end. Trimming them makes a video tighter, and it brings a long clip inside the length limits of the place you want to post it.
Choose a video, play it to find your start and end, and press "Use the player position" for each, or type the seconds. The fast cut copies the video without re-encoding, so it is done in a moment and the quality is untouched. The exact cut re-encodes to an H.264 MP4 and starts on the precise frame. The file never leaves your device.
Fast cut or exact cut
A video is stored as key frames, which are complete pictures, and the frames between them, which only hold changes. A cut without re-encoding has to begin on a key frame, so the fast cut can start a little before the time you chose, often up to a second or two. In return it is quick and loses no quality.
The exact cut decodes and re-encodes the video, so it begins exactly where you set it and comes out as an H.264 MP4. It takes longer and, like any re-encode, loses a little quality.
Trimming for Pinterest
Pinterest accepts video pins from 4 seconds to 5 minutes long. The tool shows the length of your selection and tells you when it falls outside that range.
After trimming, reshape the clip with the Pinterest video resizer, shrink the file with the video compressor, or turn a few seconds into a loop with the video to GIF converter.
