4K describes picture dimensions, HEVC/H.265 is a compression format, and HDR concerns brightness and color representation. One does not imply the others: a 4K HEVC file can still be SDR.
Choose the processing goal
- For a supported MP4/M4V file that only needs tags or artwork, consider a metadata-update preset.
- For a container change, Apple compatible can directly copy suitable H.264/HEVC video within its limits.
- Changing resolution or codec can require a new encode, which has different quality and compatibility implications.
Do not assume that a preset name guarantees every HDR variant, Dolby Vision profile or HDR-to-SDR conversion. Direct video copying avoids a new picture encode, but the resulting container, metadata and player still need to support the source's characteristics.
Check before processing a collection
- Keep the original and process one representative file.
- Test original and output in the same player on the same display.
- Compare bright scenes, dark scenes and skin tones.
- Check the device/display HDR settings and the selected playback path.
For pink, washed-out, excessively dark or otherwise incorrect colors, record the source codec, bit depth and HDR type if known, preset, player, display and whether the original looks correct. Include logs if processing fails.
A codec label or a successful conversion alone is not a complete compatibility test. This guide provides a checking workflow rather than a universal device/profile compatibility list.