How to write fmp4?

Hello,

I am currently researching your Rust library and have come across the read_fragment_header() function in the Reader. However, I noticed that there doesn’t seem to be a corresponding function in the Writer for writing the header data.

Could you please provide some guidance on how to use the Writer to write the corresponding data? Is there a specific function or method that I should use, or is this functionality integrated into another function?

Thank you for your time and assistance.