There was a time when preserving an audiovisual recording meant protecting a physical object. Film reels, magnetic audio tapes, U-matic, Betacam, VHS, Digital Betacam and other professional formats demanded careful handling, controlled environments and, above all, working playback machines.
Digitization changed that relationship. Instead of repeatedly handling an ageing original, archivists could capture its content as digital files, create preservation masters and produce access copies without returning to the carrier. Yet early digital preservation created another dependency: storage media, especially Linear Tape-Open (LTO).
For many institutions LTO became the dependable workhorse: comparatively inexpensive, removable, offline and suitable for large audiovisual collections. But every new generation brought higher capacity, changing drives and a continuing obligation to migrate data before hardware and interfaces disappeared.
LTO is Evolving, Not Disappearing
LTO-7, introduced in 2015, stores 6 TB natively. Current LTO-10 technology has moved to 30 TB and 40 TB native cartridge specifications. The increase is dramatic, but capacity alone does not solve preservation. Backward compatibility is limited, and a current-generation drive cannot simply read every older tape.
That distinction matters. An LTO-7 cartridge is not automatically useless because it is old; if the media is sound and a compatible drive and software remain available, the data may still be recoverable. The preservation risk lies in the shrinking ecosystem around the carrier and the absence of a planned migration path.
The Scanner Has Become a Preservation Workstation
Modern film digitization is no longer merely a telecine transfer. High-end sprocketless scanners can handle fragile material, capture at high resolution and create multiple outputs from one carefully controlled scan. The British Film Institute has described using a Lasergraphics Director 65 capable of handling gauges from 8mm to 70mm and scanning up to 13.5K, while its normal preservation workflow commonly uses 4K with lower-resolution access derivatives.
The pioneers of audiovisual preservation worked in an era when saving a recording often meant saving its physical carrier. Their discipline preserved films, broadcasts and sound recordings that would otherwise have vanished.
Professional systems now include Lasergraphics ScanStation and Director platforms, ARRI ARRISCAN, DFT POLAR HQ, Blackmagic Cintel and specialized systems such as Sondor. Choice depends on gauge, shrinkage, perforation damage, sound format, required resolution, throughput and the archival significance of the material.
The key advance is not simply resolution. A contemporary workflow can connect capture, image processing, metadata, quality control and storage so that the preservation master enters a managed repository immediately after validation.
Videotape: The Disappearing-Machine Problem
Videotape remains more difficult. U-matic, one-inch Type C, Betacam, Digital Betacam, VHS and other legacy formats still require appropriate playback equipment. No cloud service can recover a signal from a cassette if the correct machine, heads, time-base correction and engineering knowledge no longer exist.
The urgency therefore lies at the ingest stage. Once the signal has been captured correctly, software can take over much of the repetitive work. FFmpeg supports processing and transformation; MediaInfo identifies technical properties; MediaConch can test files against defined policies; QCTools assists audiovisual signal analysis; vrecord supports preservation-oriented capture; and embARC assists embedded archival metadata.
Automation is valuable, but it is not a substitute for an experienced eye and ear. A technically valid file may still contain a bad transfer, missing programme content, colour errors, audio distortion or incorrect field handling.
Audio: Capture Faithfully, Then Manage Digitally
Audio preservation has followed the same transition. Analog recordings are captured into high-quality digital files, while born-digital recordings should normally retain their original characteristics unless a documented preservation reason requires transformation. IASA guidance supports professional high-resolution capture, with 24-bit resolution and appropriate sampling rates such as 96 kHz for suitable analogue transfers.
Broadcast Wave Format remains useful because it can carry professional audio together with structured metadata. As with video, the objective is to create a trustworthy preservation master once, document it properly and avoid needless re-digitization of the original carrier.
The Real Revolution is Behind the Scanner
The most consequential change is taking place after digitization. Earlier workflows often ended with delivery on hard disks or LTO cartridges. Modern repositories can ingest the preservation master directly into networked or object-based storage and automatically apply integrity, retention, replication and access policies.
Amazon S3 provides archival storage classes, object locking and replication options. Microsoft Azure offers archive tiers and immutable-storage controls. Google Cloud Storage provides lifecycle management, versioning and retention-lock mechanisms. Institutional object stores can provide similar functions without placing the entire collection in a public cloud.
This changes the archivist's daily task. Instead of manually preparing a separate cartridge for each group of digitized files, the institution can define preservation policy and allow software to create and monitor the required copies.
Does Every Digitized Footage Item Still Need a Separate Backup?
Not in the old operational sense. A professionally designed repository can automate replication, checksum creation, integrity checking, retention and disaster-recovery copies. The technician need not manually create and catalogue an additional tape every time a new asset is digitised.
But this does not mean that one stored copy is enough; replication and backup are not identical. A configuration error, malicious deletion, ransomware event or compromised administrator account can affect multiple online copies. A preservation system therefore needs independently recoverable copies, separation of failure domains, controlled permissions and tested recovery procedures.
The modern objective is not "no backup," it is "no unnecessary manual backup." The preservation copy still exists; increasingly, the infrastructure creates, verifies and protects it automatically.
AI Enters the Archive
Artificial intelligence adds another layer. Speech recognition can create transcripts; computer vision can assist scene and object discovery; automated systems can propose keywords, detect shot changes and make large uncatalogued collections searchable. AI-assisted tools can also support restoration tasks such as stabilisation, noise reduction and defect detection.
The archival rule, however, should remain strict: an AI-enhanced or restored version is a derivative, not a silent replacement for the preservation master. Provenance — what was captured, what was changed, by whom, using which process and when — becomes more important as synthetic and generative tools become commonplace.
The Economics Have Changed Too
Traditional preservation budgets were easy to visualize: cartridges, tape drives, shelves, vaults and migration cycles. Contemporary costs are less visible. They include storage capacity, data transfer, retrieval, cybersecurity, software, vendor dependence, staff expertise and the ability to export an entire collection if the service provider changes.
Cloud storage can remove some local hardware burdens, but it is not automatically cheaper for petabyte-scale audiovisual masters. A hybrid model — fast local storage for active work, managed object storage for preservation, and an offline or otherwise isolated recovery copy — may remain the most sensible architecture for many institutions.
What Digitization Service Providers Must Now Offer
The commercial model is consequently changing. A service provider should no longer be judged only by how many hours of film, video or audio it can transfer. Professional competence increasingly covers the whole preservation chain: carrier assessment, calibrated capture, preservation-format selection, metadata, checksums, automated and human QC, secure transfer, repository integration and migration planning.
Contracts should clearly identify who owns the files, who holds the preservation copies, who verifies successful delivery, how long the contractor retains temporary copies, what security controls apply, and what happens after the retention period. A digitization contractor should not become the permanent custodian merely because its server contains the last surviving copy.
This also changes the question of separately charging for LTO backups. If a client already operates a properly managed repository with independent, tested recovery copies, an additional contractor-created LTO set may be redundant. If that tape is the only genuinely independent recovery copy, removing it would be poor preservation practice. The answer lies in architecture and risk, not fashion.
Storage Capacity is Not Image Quality
A larger tape, faster server or more expensive cloud account cannot improve a bad digitisation. Preservation quality begins at capture. Film condition, scanner optics, transport stability, resolution, colour management, audio alignment, signal correction, file format and quality control determine what survives.
The same principle applies to file formats. FFV1, DPX, TIFF sequences, WAV/BWF and professional video containers each have legitimate uses, but none is universally correct. Institutions should select formats according to source characteristics, preservation policy, interoperability and long-term sustainability rather than following a fashionable specification.
Conclusion: Honor The Old, Redesign the New
The pioneers of audiovisual preservation worked in an era when saving a recording often meant saving its physical carrier. Their discipline preserved films, broadcasts and sound recordings that would otherwise have vanished. LTO then provided an important bridge into large-scale digital preservation.
The next stage is not a rejection of those technologies. It is a change in where the intelligence resides. Scanners are better, storage is distributed, integrity checking can be automated, and AI can assist discovery and quality control. The archivist's responsibility moves upward — from handling every copy manually to designing and supervising the rules by which copies are created, protected, verified, accessed and migrated.
For archivists and digitization service providers, the guiding principle should therefore be simple: digitise once, preserve intelligently, verify continuously and migrate whenever necessary. The golden age taught us the value of the original. The digital age must ensure that convenience never makes us forget it.
- FIAF — Film Scanners Forum and technical resources: fiafnet.org
- IASA — Guidelines for the Preservation of Video Recordings (TC-06) and digital audio principles: iasa-web.org
- FADGI — Digitization software and audiovisual guidance: digitizationguidelines.gov
- Library of Congress — Recommended Formats Statement and digital preservation guidance: loc.gov
- LTO Program — technology roadmap, specifications and compatibility: lto.org
- Amazon Web Services — S3 archival storage, Object Lock and replication: aws.amazon.com
- Microsoft Azure — Blob archive tiers and immutable storage: azure.microsoft.com / learn.microsoft.com
- Google Cloud — Cloud Storage lifecycle and retention controls: cloud.google.com
- British Film Institute — contemporary film scanning and preservation workflow: bfi.org.uk
