Text field for FFmpeg parameters

[ySergi]

Instead of the current system where we have to write the parameters and add them one by one, wouldn't it be better to have a large text field where we can write the FFmpeg parameters we want to create the encoding templates all at once? I propose this because, as I said, having to type, for example, ‘-g 240’ -> click add -> ‘preset slow’ -> click add -> ‘-pix_fmt yuv420p10le’ -> click add... ends up being very tedious, especially when the FFmpeg parameters are long. I would like to use, for example, svtav1-params and x265-params, as they allow for much more refined encoding, but due to the strange ‘tag’ system it has, it would be very complex and tedious to do.

Example: