As a PHP expert who has extensive experience working with various frameworks, including Laravel and CodeIgniter, I believe my skills align perfectly with the requirements for your project - "Developing ffmpeg Tools in Docker Images". Not only have I developed similar tools like osumffmpeg in the past, but I've also built applications that integrate APIs, such as YouTube's, which directly result in uploading videos more efficiently.
The ability to loop video with duration is a parameter I've successfully implemented in previous ffmpeg projects. Additionally, I have tremendous experience working with databases and user login systems, so the feature you need for "Access User Login" will be handled skillfully to ensure a seamless experience for users accessing the tool on one port.
In short, my extensive knowledge of Docker, familiarity with API integrations and my adeptness at handling PHP-based tasks make me the ideal candidate for your project. With my team of talented developers from different backgrounds such as React JS and NodeJS we can ensure timely delivery of high-quality work that will propel your brand to greater heights. Let's make your vision a reality!