Copy-protection system on physical media — disc plays only in assigned geographic region. Controls release staggering and territorial rights.
Region code
If you buy a DVD or Blu-ray from Asia and can't play it at home – that's due to the region code. The system divides the world into six regions (Region 1–6), each disc carries a code, and each player is set to a specific region. If you play a Region 2 disc on a Region 1 player, the screen stays black. This isn't a technical oversight but calculated control: the producer – or more precisely, the rights holder – determines when, where, and at what price their material enters the market.
For the producer and distributor, this is a powerful tool. While a blockbuster is still playing in cinemas in the USA, the disc release in Europe can already be planned – with different bonus material, different language versions, different prices. The region code locks the European buyer out of the American DVD until the theatrical release there is over. This protects distribution windows, prevents gray market imports, and secures regional licensing agreements. In practice, this means: with an international co-production, you establish early on which disc region will receive which cut, which subtitles, which artwork – and factor the technical implementation of the code into post-production.
Blu-ray follows a similar principle, but with three regions instead of six. However, there are borderline cases: Region 0 (region-free discs) exists in the standard but is reluctantly pressed by manufacturers – due to the risk of second-market arbitrage. Many set-top players allow a one-time change of the code, after which the player is locked to the chosen region. This leads to everyday conflicts in international distribution: an editor in London needs a Region 2 version to check the final quality but then cannot check the Region 1 preview themselves.
Practically, this means for you in daily production: factor in region code requirements for DCP delivery and DVD mastering. Clarify with the distributor early on which regions will receive which content variants. And if you want to work internationally yourself – a multi-regional player offers a solution, but it costs extra and isn't legal everywhere. The region code appears inconspicuous but involves real work steps in mastering and requires coordination in international distribution.