---
title: Sample atom container for the QTVR flattener
framework: QuickTime File Format
role: article
role_heading: Article
path: quicktime-file-format/sample_atom_container_for_the_qtvr_flattener
---

# Sample atom container for the QTVR flattener

Specify an import preview file for the flattener with atoms.

## Overview

Overview The sample code in the following listing creates an atom container and adds atoms to indicate an import preview file for the flattener to use. Boolean yes = true; QTAtomContainer exportData; QTAtom parent; err = QTNewAtomContainer(&exportData); // create a parent for the other settings atoms err = QTInsertChild (exportData, kParentAtomIsContainer,             QTVRFlattenerParentAtomType, 1, 0, 0, nil, &parent); // Add child atom to indicate we want to import the preview from  a file err = QTInsertChild (exportData, parent, QTVRImportPreviewAtomType,  1, 0,             sizeof (yes), &yes, nil); // Add child atom to tell which file to import err = QTInsertChild (exportData, parent, QTVRImportSpecAtomType,  1, 0,             sizeof (previewSpec), &previewSpec, nil); // Tell the export component MovieExportSetSettingsFromAtomContainer (qtvrExport, exportData); Overriding the compression settings is a bit more complicated. You need to open a standard image compression dialog component and make calls to obtain an atom container that you can then pass to the QTVR Flattener component. ComponentInstance sc; QTAtomContainer compressorData; SCSpatialSettings ss; sc = OpenDefaultComponent(StandardCompressionType,StandardCompressionSubType); ss.codecType = kCinepakCodecType; ss.codec = nil; ss.depth = 0; ss.spatialQuality = codecHighQuality err = SCSetInfo(sc, scSpatialSettingsType, &ss); err = SCGetSettingsAsAtomContainer(sc, &compressorData); MovieExportSetSettingsFromAtomContainer (qtvrExport, compressorData);

## See Also

### Optimizations

- [The QTVR flattener](quicktime-file-format/the_qtvr_flattener.md)