avh4 / lossless-cut

Cross platform GUI tool for lossless trimming / cutting of videos using ffmpeg

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 and discard GB of data without losing quality. It doesn't do any decoding / encoding and is therefore extremely fast. Also allows for taking JPEG snapshots of the video at the selected time. This app uses the awesome ffmpeg🙏 for doing the grunt work. Also supports lossless cutting in the most common audio formats.

ffmpeg is now included in the app! 🎉

Installing / running

• Download latest LosslessCut from releases
• Run LosslessCut app/exe
• On OSX, to open LosslessCut.app, Right Click > Open to bypass the security warning.

Documentation

Supported platforms

• Mac OS X
• Windows (64/32bit)
• Linux (64/32bit, not tested)

Supported formats

Since LosslessCut is based on Chromium and uses the HTML5 video player, not all ffmpeg supported formats will be supported. The following formats/codecs should generally work: MP4, MOV, WebM, MKV, OGG, WAV, MP3, AAC, H264, Theora, VP8, VP9 For more information about supported formats / codecs, see https://www.chromium.org/audio-video.

Typical flow

• Drag drop a video file into player to load or use ⌘/CTRL+O.
• Press SPACE to play/pause
• Select the cut start and end time
• Press the scissors button to export the 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 built using Electron. Make sure you have at least node v4 with npm 3. The app uses ffmpeg from PATH when developing.

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

Running

In one terminal:

npm run watch

Then:

npm start

Building package

npm run download-ffmpeg
npm run extract-ffmpeg
npm run build
npm run icon-gen
npm run package # builds all platforms

Credits

• App icon made by Dimi Kazak from www.flaticon.com is licensed by CC 3.0 BY