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# LosslessCut 🎥 [![Travis](https://img.shields.io/travis/mifi/lossless-cut.svg)]()
Simple, cross platform tool for lossless trimming / cutting of video and audio files. Great for rough processing of large video files taken from a video camera, GoPro, drone, etc. It lets you quickly extract the good parts from your videos and discard GBs 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 included in the app.
Simple, cross platform tool for lossless trimming/cutting of video and audio files. Great for rough processing of large video files taken from a video camera, GoPro, drone, etc. It lets you quickly extract the good parts from your videos and discard GBs of data without losing quality. It doesn't do any decoding / encoding and is therefore extremely fast. This app uses the awesome ffmpeg (included) for doing the grunt work.
![Demo](https://thumbs.gfycat.com/HighAcclaimedAnaconda-size_restricted.gif)
## Features
- Lossless cutting of common video and audio formats
- Take full-resolution snapshots from videos in JPEG/PNG format
- Change rotation/orientation metadata in videos. Great for rotating phone videos that turns out the wrong way without actually re-encoding the video.
## Installing / running
- Download [latest LosslessCut from releases](https://github.com/mifi/lossless-cut/releases)
- Run LosslessCut app/exe
- On OSX, to open LosslessCut.app, Right Click > Open to bypass the security warning.
## Documentation
### Supported platforms
## Supported platforms
- Mac OS X
- Windows (64/32bit)
- Linux (64/32bit, not tested)
### Supported formats
## 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.
Note that the MPEG TS format is not supported. See known issues.
### Typical workflow
## Typical workflow
- Drag drop a video file into player to load or use <kbd>⌘</kbd>/<kbd>CTRL</kbd>+<kbd>O</kbd>.
- Press <kbd>SPACE</kbd> to play/pause
- Select the cut start and end time. Press <kbd>I</kbd> to select the start time, <kbd>O</kbd> to select the end time for the cut.
- Press the rotation button if you want to set rotation metadata
- Press the rotation button if you want to override orientation metadata
- 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
## Keyboard shortcuts
Press <kbd>h</kbd> To show/hide list of shortcuts
For old shortcuts see here:
https://github.com/mifi/lossless-cut/blob/41d6991c11b0a82b08344fd22a1ea094af217417/README.md#keyboard-shortcuts
### Known issues
## Known issues
- Some output videos will have an empty portion in the beginning (you might lose a few seconds after your in-cutpoint). A tip is to set the cutpoint a few extra seconds before the part you want to keep, that way you will not lose anything. See discussion in [#13](https://github.com/mifi/lossless-cut/pull/13)
- If you get an error when cutting any kind of file under Windows, please check your anti-virus. It might be blocking execution of ffmpeg, see [#18](https://github.com/mifi/lossless-cut/issues/18)
- Unsupported files can be losslessly remuxed to for example mp4 first with the following command: `ffmpeg -i input.ts -acodec copy -vcodec copy out.mp4`
## Development building / running