Libopenshot is dual-licensed under the LGPL version 3 and a simple commercial license. We recommend you first try the open-source version, and once you've verified it satisfies your project's needs, then migrate to a commercial license. The funds from commercial licenses are used by OpenShot Studios, LLC to develop OpenShot Video Editor, our award-winning open-source desktop video editor. We feel this is a fair trade-off, and helps fund the continued development of OpenShot Video Editor. Commercial license does not include a license to JUCE (used for audio functionality) or any other dependent libraries. Feel free to email us if you are interested in learning more.
Please keep in mind that certain dependencies, such as FFmpeg, Libav, JUCE, and others, have their own licenses and restrictions, and you should verify that those are compatible with your commercial application licensing scheme.