This is for cases where: * We *do* want to refer to the PCR stream to figure out global positioning, gap detection, wrapover correction. * But we do not want to apply any skew correction to the output This is useful for cases where: * the input stream has already been clock-corrected (for example with mpegtslivesrc) * or where the output doesn't require synchronization against a clock (ex: for storage) Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9301>