LosslessCut 🎥

Simple, cross platform video editor for lossless trimming / cutting of videos. Great for rough processing of large video files taken from a video camera, GoPro, drone, etc. Lets you quickly extract the good parts from your videos. It doesn't do any decoding / encoding and is therefore extremely fast and has no quality loss. Also allows for taking JPEG snapshots of the video at the selected time. This app uses the awesome ffmpeg🙏 for doing the grunt work. ffmpeg is not included and must be installed separately.

Download

Installing / running

• Install ffmpeg
• Download latest LosslessCut from releases
• Run app
• If ffmpeg is available in $PATH/%PATH% it will just work
• If not, a dialog will pop up to select ffmpeg executable path.

Documentation

• Drag drop a video file into player to load or use ⌘/CTRL+O.
• Select the start and end time
• Press the scissors button to export a slice.
• Press the camera button to take a snapshot.

The original video files will not be modified. Instead it creates a lossless export in the same directory as the original file with from/to timestamps. Note that the cut is currently not precise around the cutpoints, so video before/after the nearest keyframe will be lost. EXIF data is preserved.

Keyboard shortcuts

• SPACE, k Play/pause
• j Slow down video
• l Speed up video
• ← Seek backward 1 sec
• → Seek forward 1 sec
• . (period) Tiny seek forward
• , (comma) Tiny seek backward
• i Mark in / cut start point
• o Mark out / cut end point
• e Export selection (in the same dir as the video)
• c Capture snapshot (in the same dir as the video)

Development building / running

This app is made using Electron. electron-compile is used for development. Make sure you have at least node v4 with npm 3.

git clone https://github.com/mifi/lossless-cut.git
cd lossless-cut
npm install

Running

npm start

Building package

npm run build
npm run package

TODO / ideas

• About menu
• icon
• Visual feedback on button presses
• ffprobe show keyframes
• ffprobe format
• improve ffmpeg error handling
• Slow scrub with modifier key
• show frame number
• Bundle ffmpeg
• support for loading other formats by streaming through ffmpeg?
• cutting out the commercials in a video file while saving the rest to a single file?

Links

• http://apple.stackexchange.com/questions/117306/what-options-are-available-to-losslessly-trim-mp4-m4v-video-on-10-8-or-above
• http://superuser.com/questions/554620/how-to-get-time-stamp-of-closest-keyframe-before-a-given-timestamp-with-ffmpeg/554679#554679
• http://www.fame-ring.com/smart_cutter.html
• http://electron.atom.io/apps/
• https://github.com/electron/electron/blob/master/docs/api/file-object.md
• https://github.com/electron/electron/issues/2538