3b2e262821
- GetValue() calculates the value at the given position now ondemand, without caching values as previously. First, it uses binary search to find the segment (start and end point) containing the given position. Constant and linear interpolation are straightforward, bezier curves are calculating by binary search between the end points until a point on the curve is found with a X coordinate close enough to the given position. That points Y coordinate is returned. - IsIncreasing(), GetRepeatFraction(), GetDelta() use GetValue() instead of accessing the (removed) Values vector. - Removed now unused private functions, and the unused public Process(). First test results show good performance improvements for the "rendering case" (setting up the keyframe points at once, then getting all values) and drastic performance improvements for the "preview case" (changing keyframe points, mixed with getting values).
OpenShot Video Library (libopenshot) is a free, open-source C++ library dedicated to delivering high quality video editing, animation, and playback solutions to the world.
Build Status
Features
- Cross-Platform (Linux, Mac, and Windows)
- Multi-Layer Compositing
- Video and Audio Effects (Chroma Key, Color Adjustment, Grayscale, etc…)
- Animation Curves (Bézier, Linear, Constant)
- Time Mapping (Curve-based Slow Down, Speed Up, Reverse)
- Audio Mixing & Resampling (Curve-based)
- Audio Plug-ins (VST & AU)
- Audio Drivers (ASIO, WASAPI, DirectSound, CoreAudio, iPhone Audio, ALSA, JACK, and Android)
- Telecine and Inverse Telecine (Film to TV, TV to Film)
- Frame Rate Conversions
- Multi-Processor Support (Performance)
- Python and Ruby Bindings (All Features Supported)
- Qt Video Player Included (Ability to display video on any QWidget)
- Unit Tests (Stability)
- All FFmpeg Formats and Codecs Supported (Images, Videos, and Audio files)
- Full Documentation with Examples (Doxygen Generated)
Install
Detailed instructions for building libopenshot and libopenshot-audio for each OS. These instructions are also available in the /docs/ source folder.
Hardware Acceleration
OpenShot now supports experimental hardware acceleration, both for encoding and decoding videos. When enabled, this can either speed up those operations or slow them down, depending on the power and features supported by your graphics card. Please see doc/HW-ACCELL.md for more information.
Documentation
Beautiful HTML documentation can be generated using Doxygen.
make doc
(Also available online: http://openshot.org/files/libopenshot/)
Developers
Are you interested in becoming more involved in the development of OpenShot? Build exciting new features, fix bugs, make friends, and become a hero! Please read the step-by-step instructions for getting source code, configuring dependencies, and building OpenShot.
Report a bug
You can report a new libopenshot issue directly on GitHub:
https://github.com/OpenShot/libopenshot/issues
Websites
- https://www.openshot.org/ (Official website and blog)
- https://github.com/OpenShot/libopenshot/ (source code and issue tracker)
- https://github.com/OpenShot/libopenshot-audio/ (source code for audio library)
- https://github.com/OpenShot/openshot-qt/ (source code for Qt client)
- https://launchpad.net/openshot/
License
Copyright (c) 2008-2019 OpenShot Studios, LLC.
OpenShot Library (libopenshot) is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
OpenShot Library (libopenshot) is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with OpenShot Library. If not, see http://www.gnu.org/licenses/.
To release a closed-source product which uses libopenshot (i.e. video editing and playback), commercial licenses are also available: contact sales@openshot.org for more information.