mifi / lossless-cut

LosslessCut 
 The swiss army knife of lossless video/audio editing
 Thanks to my supporters and everyone who purchased LosslessCut!
LosslessCut aims to be the ultimate cross platform FFmpeg GUI for extremely fast and lossless operations on video, audio, subtitle and other related media files.
The main feature is lossless trimming and cutting of video and audio files, which is great for saving space by rough-cutting your large video files taken from a video camera, GoPro, drone, etc. It lets you quickly extract the good parts from your videos and discard many gigabytes of data without doing a slow re-encode and thereby losing quality. There are also many more use cases. Everything is extremely fast because it does an almost direct data copy, fueled by the awesome FFmpeg which does all the grunt work.
## Table of contents
- Features
- Example lossless use cases
- Download
- Supported formats
- Documentation, usage & getting started
- Video demos
- Featured
- Attributions
## Features
- Lossless cutting of most video and audio formats
- Smart cut (experimental)
- Losslessly cut out parts of video/audio (for cutting away commercials etc.)
- Losslessly rearrange the order of video/audio segments
- Lossless merge/concatenation of arbitrary files (with identical codecs parameters, e.g. from the same camera)
- Lossless multi track/stream editing
 - Combine arbitrary tracks from multiple files (ex. add music or subtitle track to a video file)
 - Remove unneeded tracks
 - Replace or re-encode only some tracks
 - Extract all tracks from a file (extract video, audio, subtitle, attachments and other tracks from one file into separate files)
- View technical data about all tracks. Edit file metadata, per-track metadata and per-track disposition
 - Suggestions for common metadata keys and languages
 - Copy metadata from another track or file, or apply a value to all tracks of the same type
 - See which tracks have been changed, and reset changes
- Select video/audio tracks for playback. Playback multiple audio tracks simultaneously.
- Fast multi-file workflow (note: no mass/batch export yet)
- Keyboard shortcut workflow
- Losslessly remux video/audio into a different container (file) format
- Take full-resolution snapshots from videos in JPEG/PNG format (low or high quality)
- Export ranges of video frames to images (every nth frame, second, by scene change, best thumbnails)
 - Export only from a selected time range (segment)
 - Optionally include original timestamps in image file names
- Manual input of cutpoint times
- Apply a per-file timecode offset (and auto load timecode from file)
- Change rotation/orientation metadata in videos
- Timeline zoom and frame/keyframe jumping for cutting around keyframes
- Video thumbnails and audio waveform
- Saves per project cut segments to project file
- View FFmpeg last command log so you can modify and re-run recent commands on the command line
- Undo/redo
- Advanced segment query and mutation JS-based expression languag