The Non-Graded Archival Master (NAM) is a fully texted image sequence of the non-color graded, fully conformed and locked picture, including final VFX, rendered in a single scene-referred color space with no output or display transform applied. The archival resolution will be specific to the project and will be communicated by Netflix. At minimum, the archival resolution will be no less than 3840x2160 (UHD) and must include the final delivery active picture area with no cropping, matting or masking applied over the image. If your primary capture format was less than 3840x2160 (UHD) please reach out to your Post Production Management or Creative Technologies Workflow contacts at Netflix to discuss your best options.
The file format of the Non-Graded Archival Master (NAM) will depend on the transfer function of the scene-referred color space as well as the bit-depth of the source files:
*ACES projects must be Linear / AP0, per SMPTE ST 2065-1. ACEScct encoded files will not be accepted.
**10-bit DPX (.dpx) will be accepted only if 50% or greater of the primary capture footage was 10-bit or lower.
- Frame numbering must be continuous within each delivered asset and must always be consistent across all picture archival assets.
- For feature films working in reels the frame number must be continuous within each reel. The initial frame number for each reel/segment is at the discretion of the finishing partner.
- Textless inserts must be delivered with image properties identical to the corresponding texted asset.
- Textless inserts must include a textless background for any shot/sequence of the content that contains on-screen graphic text.
- Textless inserts must be provided cut-to-cut (i.e., the textless insert should not begin or end in the middle of a shot, the entire shot should be provided).
- Textless main titles or credits do not require a distinct naming convention from other textless inserts.
- Textless inserts must be numbered to match the numbering of the corresponding texted shot/sequence.
- If the content includes a significant amount of on-screen graphic text throughout, it is acceptable to create full-length textless asset rather than providing segmented frame ranges.
- In the context of this document, graphics overlays such as emojis or text balloons should be considered texted elements.
Quicktime Wrapped Non-Graded Archival Master Exceptions
Quicktime wrapped compressed formats may be acceptable under limited circumstances, particularly in Animation workflows where source media is entirely compressed. Please consult Netflix to determine if QuickTime delivery is acceptable for your project.
Minimum acceptable compressed formats:
HDR: 12-bit, DNxHR 444 or ProRes 4444 XQ
SDR: 10-bit, DNxHR 444, or ProRes 444
- If a non-color grade related change in picture is made to the IMF in the process of delivery, then the Non-Graded Archival Master asset must be updated to contain that same change.
- It is acceptable for a Non-Graded Archival Master to contain color bars, framing charts, head/tail black, head/tail visible pop for sync, or Academy leaders if any of these are present in the timeline the asset is generated from, however all non-color grade related content from the first-frame-of-action (FFOA) to the last-frame-of-action (LFOA) must match the final/approved IMF.
Examples of Optical Effects: stabilizations, reframing, removal of production equipment, simple composites, cosmetic fixes, etc.
- Any effect or fix applied in the online editorial process should be included in the Non-Graded Archival Master (NAM).
- Any effect or fix applied with a color grading process should be excluded from the Non-Graded Archival Master (NAM).
Asset Review and Confirmation
Following a careful review of Picture Archival assets, a Checksum Manifest should be generated as a record of this review. The manifest will then be verified by Netflix confirming that no content has been lost or altered during the delivery process. Checksum Manifests should be provided in one of the supported formats:
- Media Hash List (MHL) at the root level of the folder being delivered. The MHL should include entries for all files in the delivered folder. MHL manifests can be generated by a large number of 3rd party or open source tools.
- Checksum.txt in folder containing the image sequence. Checksum.txt manifests can be generated by npack or Content Hub Command Line (chcli) tools.
Please note that “zipping” of NAMs is no longer required and should not be done.
Folder Structure & Naming Convention
Details on folder structure and file naming for delivery can be found at ‘Picture Archival Assets: Folder Structure and File Naming Convention’.
Consolidated Best Practices into this article, adding the "Asset Review and Confirmation" item to that section.
Updated language around Quicktime Wrapped Non-Graded Archival Master Exceptions to specify that these are the minimum requirements and also to specify different codecs for SDR and HDR.