> For the complete documentation index, see [llms.txt](https://docs.calibratedsoftware.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.calibratedsoftware.com/tin-man/tin-man-desktop/preferences/export-media/op1a.md).

# OP1a

<figure><img src="/files/vusTzcDLzM5CUn826Qvc" alt=""><figcaption></figcaption></figure>

**Export Tagging Options**

* **Tag All H.264 Exports as ‘High Unconstrained’**\
  When enabled, all generic **H.264 video exports** within MXF OP1a files will be tagged using the widely supported **'High Unconstrained'** profile.

  > If disabled, the export will attempt to use the specific H.264 profile based on the encode settings, which may offer more precision but less compatibility.
* **Use MCA Audio Labels**\
  When enabled, audio channels in MXF OP1a exports will be tagged with **descriptive MCA labels** (e.g., Front Left, Front Right, Center, LFE).

  > Useful for professional delivery specs. Can be toggled per job in the Export panel.