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The swiss army knife of lossless video/audio editing

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Quick Overview

LosslessCut is a free, cross-platform video and audio editor with a focus on lossless trimming and cutting. It's designed for quick and easy trimming of videos and audio files without re-encoding, making it ideal for large files or high-quality edits.

Pros

  • Fast and lossless editing without quality loss
  • Supports a wide range of video and audio formats
  • Cross-platform compatibility (Windows, macOS, Linux)
  • User-friendly interface with drag-and-drop functionality

Cons

  • Limited advanced editing features compared to full-fledged video editors
  • May not work well with some proprietary or uncommon file formats
  • Requires FFmpeg to be installed separately for some operations

Getting Started

  1. Download the appropriate version for your operating system from the releases page.
  2. Install FFmpeg if not already installed on your system.
  3. Launch LosslessCut and drag-and-drop your video or audio file into the application.
  4. Use the timeline to select the portion of the file you want to keep.
  5. Click the "Export" button to save your edited file.

For more detailed instructions and advanced features, refer to the official documentation.

Competitor Comparisons

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flowblade

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Video Editor for Linux

Pros of Flowblade

  • Full-featured non-linear video editor with a comprehensive set of tools
  • Supports complex multi-track editing and compositing
  • Offers a wide range of video and audio effects

Cons of Flowblade

  • Steeper learning curve due to its more complex interface
  • Requires more system resources for processing and rendering
  • Limited to Linux operating systems

Code Comparison

Flowblade (Python):

def _get_track_counts():
    audio_tracks = get_track_count()
    video_tracks = PROJECT().get_track_count() - audio_tracks
    return (video_tracks, audio_tracks)

LosslessCut (JavaScript):

function getFrameCount({ frames, fps, duration }) {
  if (frames) return frames;
  if (fps && duration) return Math.round(fps * duration);
  return undefined;
}

Summary

Flowblade is a comprehensive video editing software for Linux, offering advanced features and multi-track editing capabilities. It's suitable for more complex projects but requires a steeper learning curve. LosslessCut, on the other hand, is a simpler, cross-platform tool focused on quick and lossless cutting of video files. While Flowblade provides more editing power, LosslessCut offers ease of use and faster processing for basic cutting tasks.

olive-editor logo

olive

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Free open-source non-linear video editor

Pros of Olive

  • Full-featured non-linear video editor with a timeline, effects, and transitions
  • Supports a wide range of video formats and codecs
  • Offers a more comprehensive set of editing tools for complex projects

Cons of Olive

  • Steeper learning curve due to its more complex interface and features
  • Larger file size and potentially higher system requirements
  • May be overkill for simple trimming and cutting tasks

Code Comparison

Olive (C++):

void Clip::set_timeline_in(const rational &r)
{
  timeline_in_ = r;
  InvalidateVisible();
}

LosslessCut (JavaScript):

function cutSegment(filePath, cutFrom, cutTo) {
  const ffmpegArgs = ['-i', filePath, '-ss', cutFrom, '-to', cutTo, '-c', 'copy'];
  return runFfmpeg(ffmpegArgs);
}

While both projects deal with video editing, their codebases reflect their different approaches. Olive's C++ code handles complex timeline operations, while LosslessCut's JavaScript focuses on simple cutting tasks using FFmpeg.

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OpenShot Video Editor is an award-winning free and open-source video editor for Linux, Mac, and Windows, and is dedicated to delivering high quality video editing and animation solutions to the world.

Pros of OpenShot

  • Full-featured video editor with a wide range of tools and effects
  • User-friendly graphical interface suitable for beginners and intermediate users
  • Supports a broader range of video editing tasks, including transitions and animations

Cons of OpenShot

  • Larger file size and more complex installation process
  • May be overkill for simple cutting and trimming tasks
  • Potentially slower processing times for basic operations

Code Comparison

OpenShot (Python):

def resize_project(self, new_size):
    """Resize project based on selected ratio"""
    self.timeline.SetScale(new_size)
    self.UpdateViewport()

LosslessCut (JavaScript):

async function cutMultiple(cutTimes) {
  const cuts = cutTimes.map(({ start, end }) => ({
    from: start,
    to: end,
  }));
  return cut({ cutFrom: cuts[0].from, cutTo: cuts[cuts.length - 1].to, cuts });
}

OpenShot offers a more comprehensive video editing solution with a graphical interface, while LosslessCut focuses on quick, lossless cutting of video files. OpenShot's code demonstrates its integration with a timeline and viewport, reflecting its full-featured nature. LosslessCut's code shows a streamlined approach to cutting multiple segments, emphasizing its specialized functionality.

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kdenlive

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Free and open source video editor, based on MLT Framework and KDE Frameworks

Pros of Kdenlive

  • Full-featured video editing suite with advanced tools and effects
  • Supports multi-track editing and complex project timelines
  • Integrates well with other KDE applications and workflows

Cons of Kdenlive

  • Steeper learning curve due to its comprehensive feature set
  • Larger installation footprint and system resource requirements
  • May be overkill for simple video trimming or splitting tasks

Code Comparison

Kdenlive (C++):

void TimelineModel::requestItemResize(int itemId, int size, bool right)
{
    QWriteLocker locker(&m_lock);
    std::shared_ptr<AbstractClipItem> item = getItemById(itemId);
    if (item) {
        item->requestResize(size, right);
    }
}

LosslessCut (JavaScript):

export async function cutMultiple({ filePath, cutFrom, cutTo }) {
  const ffmpegArgs = [
    '-i', filePath,
    '-c', 'copy',
    '-ss', cutFrom,
    '-to', cutTo,
    '-y', outputPath,
  ];
  await runFfmpeg(ffmpegArgs);
}

While Kdenlive offers a comprehensive video editing solution with multi-track support and complex operations, LosslessCut focuses on quick, lossless trimming and cutting of video files. Kdenlive's code demonstrates its object-oriented architecture for timeline manipulation, whereas LosslessCut's code showcases its straightforward approach to executing FFmpeg commands for video cutting.

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NewPipe

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A libre lightweight streaming front-end for Android.

Pros of NewPipe

  • Offers a wide range of features for YouTube streaming and downloading
  • Provides an ad-free experience with background playback
  • Supports multiple video platforms beyond YouTube

Cons of NewPipe

  • Limited to Android devices, not available for desktop or iOS
  • Requires manual updates and installation outside of the Google Play Store
  • May have compatibility issues with certain YouTube features

Code Comparison

NewPipe (Java):

@Override
protected void onLoadFinished() {
    if (currentInfo == null) {
        return;
    }
    super.onLoadFinished();
}

LosslessCut (JavaScript):

async function cutMultiple(cutTimes) {
  const cuts = await Promise.all(cutTimes.map(({ start, end }) => (
    cut({ start, end })
  )));
  return cuts;
}

While both projects are open-source and focus on video-related functionality, they serve different purposes. NewPipe is a feature-rich YouTube client for Android, while LosslessCut is a cross-platform video trimming tool. NewPipe's codebase is primarily in Java, tailored for Android development, whereas LosslessCut uses JavaScript with Electron for desktop applications. NewPipe offers a more comprehensive set of features for video streaming and downloading, but LosslessCut provides specialized functionality for lossless video cutting across multiple platforms.

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FFmpeg

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Mirror of https://git.ffmpeg.org/ffmpeg.git

Pros of FFmpeg

  • Extremely powerful and versatile command-line tool for video/audio processing
  • Supports a vast array of formats and codecs
  • Highly customizable with extensive options for advanced users

Cons of FFmpeg

  • Steep learning curve for beginners due to command-line interface
  • Requires technical knowledge to use effectively
  • Lacks a user-friendly graphical interface for simple tasks

Code Comparison

FFmpeg (command-line):

ffmpeg -i input.mp4 -ss 00:01:00 -to 00:02:00 -c copy output.mp4

Lossless-Cut (JavaScript):

const { cut } = require('lossless-cut');

cut({
  filePath: 'input.mp4',
  cutFrom: 60,
  cutTo: 120
});

Summary

FFmpeg is a powerful, command-line tool for video processing with extensive capabilities, while Lossless-Cut provides a user-friendly GUI for simple video cutting tasks. FFmpeg offers more flexibility and options but requires technical expertise, whereas Lossless-Cut is easier to use for basic operations but has limited advanced features compared to FFmpeg.

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README


LosslessCut

LosslessCut

The swiss army knife of lossless video/audio editing
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Thanks to my supporters and everyone who purchased LosslessCut!

screenshot



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. Or you can add a music or subtitle track to your video without needing to encode. Everything is extremely fast because it does an almost direct data copy, fueled by the awesome FFmpeg which does all the grunt work.

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 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)
  • 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)
  • Edit file metadata, per-track metadata and per-track disposition
  • Change rotation/orientation metadata in videos
  • View technical data about all tracks
  • 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
  • Give labels to cut segments
  • Annotate segments with tags
  • Import/export segments: MP4/MKV chapter marks, Text file, YouTube, CSV, CUE, XML (DaVinci, Final Cut Pro) and more
  • MKV/MP4 embedded chapters marks editor
  • View subtitles
  • Customizable keyboard hotkeys
  • Black scene detection, silent audio detection, and scene change detection
  • Divide timeline into segments with length L or into N segments or even randomized segments!
  • Speed up / slow down video or audio file (changing FPS)
  • Basic CLI and HTTP API
  • Show (DJI) embedded GPS track on a map
  • Losslessly Download videos over HTTP (e.g. HLS .m3u8)

Example lossless use cases

  • Cut out commercials from a recorded TV show (and re-format from TS to MP4)
  • Remove audio tracks from a file
  • Extract music track from a video and cut it to your needs
  • Add music to a video (or replace existing audio track)
  • Combine audio and video tracks from separate recordings
  • Include an external subtitle into a video
  • Quickly change a H264/H265 MKV video to MOV or MP4 for playback on iPhone
  • Import a list of cut times from other tool as a EDL (edit decision list, CSV) and run these cuts with LosslessCut
  • Export a list of cut times as a CSV EDL and process these in another tool
  • Quickly cut a file by its MP4/MKV chapters
  • Quickly cut a YouTube video by its chapters (or music times from a comment)
  • Change the language of a file's audio/subtitle tracks
  • Attach cover art / thumbnail to videos / audio from an external JPEG file or from a frame on the timeline
  • Change author, title, GPS position, recording time of a video
  • Fix rotation of a video that has the wrong orientation flag set
    • Great for rotating phone videos that come out the wrong way without actually re-encoding the video.
  • Loop a video / audio clip X times quickly without re-encoding
  • Convert a video or parts of it into X image files (not lossless)
  • Losslessly split a video into one file per scene (note you probably have to shift segments, see #330.)
  • Cut away silent parts of an audio/video
  • Split video into segments to for example respect Twitter's 140 second limit
  • Annotate each segment with one or more tags, then use those tags to organize your segments or use it to create an output folder structure or hierarchy for your segments.

Export cut times as YouTube Chapters

  1. Export with Merge and "Create chapters from merged segments" enabled
  2. Open the exported file and select "Import chapters" in the dialog
  3. File -> Export project -> YouTube Chapters

Re-encode only the audio track, keeping the lossless video track

First export each track as individual files. Then use Handbrake or similar to re-encode the audio file (if mp4 file, encode as AAC.) Then open the extracted video stream in LosslessCut. The open your encoded audio file and select "Include all tracks from the new file". Then export.

Advanced multi-step workflows

Tip: you can use LosslessCut in multiple passes in order to achieve separate trimming of individual tracks:

  1. Open a file an export all tracks as individual files
  2. Open the exported track files independently and cut them as desired
  3. Add the track back to the video and combine them to one output video

Download

If you want to support my continued work on LosslessCut, and you want the advantage of a secure and simple installation process with automatic, stable updates, consider getting it from your favorite store:

Mac App Store MS badge

For Linux these are some alternatives:

Snapcraft Flathub

If you prefer to download the executables manually, this will of course always be free:

If you find LosslessCut useful, I'm very thankful for your support.

What's the difference between App Stores and GitHub download? Please see FAQ

Nightly builds 🧪

If you want to test the very latest and greatest bleeding-edge version. 1. Go to Actions, 2. click on the latest Build/release, 3. scroll all the way down to Artifacts. Note: these builds may be totally broken!

Supported operating systems

Supported formats

LosslessCut uses Chromium's HTML5 video player, and not all FFmpeg supported formats and codecs are natively supported. Generally, the following formats should work: MP4, MOV, WebM, Matroska, OGG and WAV. The following audio codecs: FLAC, MP3, Opus, PCM, Vorbis and AAC. Video codecs: H264, AV1, Theora, VP8, VP9 and H265 (needs hardware decoder). More information about Chromium supported formats / codecs. What's the difference between a codec and a format?

Codecs and formats not listed above can still be converted to a supported format/codec from the File menu. (Try the fastest option first.) A low quality version of the file (with/without audio) will then be created and opened in the player. The actual cut/export operation will still be performed on the original file, so it will be lossless. This allows for potentially opening any file that FFmpeg is able to decode.

Video demos

Typical workflow

  • Drag drop a video file into player or use ⌘/CTRL+O.
  • Press SPACE to play/pause or ◀▶, ,. or mouse/trackpad wheel to seek back/forth.
  • Select the cut segment's start and end time by moving the time marker and then pressing I to set start time, and O to set end time.
    • Note that all segments you create will be preserved and exported as new files. You can change this behavior with the Yin Yang symbol ☯️, in which case it will instead remove all selected segments and export the parts between segments.
    • Note also that start times will not be accurate, see Known issues
  • (optional) If you want to add more than one segment, move to the desired start time and press +, then select the next segment start/end times with I/O.
  • (optional) If you want to re-merge all the selected segments into one file after cutting, toggle the button Separate files to Merge cuts.
  • (optional) If you want to export to a certain output folder, press the Working dir unset button (default: Input file folder)
  • (optional) If you want to change orientation, press the rotation button
  • (optional) By default, audio, video and subtitle tracks from the input file will be cut and exported. Press the Tracks button to customise and/or add new tracks from other files.
  • (optional) select a new output format
  • (optional) In the right-hand segments panel, right click a segment for options, or drag-drop to reorder. Segments will appear in this order in the merged output.
  • When done, press the Export button (or E) to show an overview with export options.
  • (optional) adjust any export options
  • Then press Export again to confirm the export
  • Press the Camera button (or C) if you want to take a JPEG/PNG snapshot from the current time
  • If you want to move the original file to trash, press the trash button
  • For best results you may need to trial and error with another output format (Matroska takes nearly everything), change keyframe cut mode or disable some tracks (see known issues).
  • Press SHIFT + / to view all keyboard & mouse shortcuts.
  • Note: The original video file will not be modified. Instead, a file is created file in the same directory as the original file with from/to timestamps in the file name.

Installation

Import / export

Command line interface (CLI) & HTTP API

Known issues, limitations, troubleshooting, FAQ

Contributing

Translation

If you have any problem or question, please read this before creating an issue. I try to answer most common questions here.

Donate 🙈

This project is maintained by me alone. The project will always remain free and open source, but if it's useful for you, consider supporting me. :) It will give me extra motivation to improve it. Or even better donate to ffmpeg because they are doing the world a big favor 🙏

Paypal | crypto

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Attributions

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