Yes, we have a basic trimming feature available as part of the Clipchamp API. It allows you to pass in 2 time stamps to cut in/out of the video file.
Thus you can create an option for your users to select only a portion of a video to be uploaded to you.
This cropping parameter lets you specify two timely offsets into the file, representing the point in times to cut in and out.
The API parameters to use for this purpose are
encoding.trim, encoding trim.from and