Edit a copy
Metadata editing writes a new supported container file. Choose a destination different from the source; SmartCut64 never treats in-place overwrite as a safe metadata operation.
Container-specific fields
Tag names and representations differ between Matroska, MP4/MOV, MPEG transport/program streams, WTV/DVR-MS and MXF. Requested values must round-trip through the selected container or validation fails.
Preserve technical metadata
Do not casually replace colour/HDR, language, disposition or codec configuration fields with descriptive tags. Inspect the output report and Program Information after changing a file used in a production workflow.