Online Delivery HD MP4 2Mbps
|Record Type||Digital Moving Images from Film-based Source Material|
|Expected Use||Distribution Copy|
|Product Name||Online Delivery Film WMV [MPD-D1]|
This option can be used when the file is expected to be used primarily in an online access capacity such as through ARC.
|Nature of Source Material||
Any digital reproduction master file from film-based source material.
|File Properties||Data Format||
Target Total Bitrate: ~2.2Mbps
Typical file size: ~15.8MB/minute or ~0.95GB/hour
|Possible File Derivatives||
Other distribution copies would be created from the higher quality reproduction master.
Previously the Motion Picture Preservation Lab created Windows Media (WMV) files for ARC/OPA.
Quality Assurance and Quality Control for Digital Imaging Products
The Digitization Services Branch’s Quality Assurance and Quality Control (QA/QA) program is evolving as new tools and resources are acquired and implemented. We are moving towards more automated and integrated systems to assure the products we make meet the specifications outlined. Digital products created by the Digitization Services Branch are validated against standardized format specifications and signature files when possible. We use a variety of format specific batch evaluation and validation tools both open source and vendor supplied, to assure technical quality level specifications are met. All files, but especially distribution system specific files, are inspected for successful playback in a variety of tools and environments. Additional quality control workflows are in development.
NARA is developing an in house job tracking order system to better coordinate work at the Branch level.
Item Level Evaluation: Automated File Characteristics Analysis