この記事はOpenCV Advent Calendar 2022の11日目の記事です。 1. はじめに OpenCVのvideoioモジュールはいくつかのbackendを用意しています。このbackendの一つにFFmpegがあります。https://docs.opencv.org/4.6.0/d0/da7/videoio_overview.htmlの「The FFmpeg library」にも OpenCV can use the FFmpeg library (http://ffmpeg.org/) as backend to record, convert and stream audio and video. とあります。また、 FFmpeg is licensed under the GNU Lesser General Public License (LGPL) version
![OpenCVのvideoioモジュールでソースビルドのFFmpegを使う - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/bc6fedab7ce7bc46ba33f25439c61dcaf7cb6be4/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Fadvent-calendar-ogp-background-f625e957b80c4bd8dd47b724be996090.jpg%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTkxNiZoPTMzNiZ0eHQ9T3BlbkNWJUUzJTgxJUFFdmlkZW9pbyVFMyU4MyVBMiVFMyU4MiVCOCVFMyU4MyVBNSVFMyU4MyVCQyVFMyU4MyVBQiVFMyU4MSVBNyVFMyU4MiVCRCVFMyU4MyVCQyVFMyU4MiVCOSVFMyU4MyU5MyVFMyU4MyVBQiVFMyU4MyU4OSVFMyU4MSVBRUZGbXBlZyVFMyU4MiU5MiVFNCVCRCVCRiVFMyU4MSU4NiZ0eHQtY29sb3I9JTIzM0EzQzNDJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTU2JnR4dC1jbGlwPWVsbGlwc2lzJnR4dC1hbGlnbj1sZWZ0JTJDbWlkZGxlJnM9MjZjY2Y2YWI3NGYwYTM2MzQ4NmE4YWQ2MzU2N2ZmYWE%26mark-x%3D142%26mark-y%3D151%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTcxNiZ0eHQ9JTQwZGFuZGVsaW9uMTEyNCZ0eHQtY29sb3I9JTIzM0EzQzNDJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTMyJnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9MmY4NzE0NDM0M2VlMzU4YTZlYjZjNmMxYjcwOWU2Nzk%26blend-x%3D142%26blend-y%3D491%26blend-mode%3Dnormal%26s%3D060c22cf4cdbb66cb5e3f3b6ee6ce40d)