mp4 files are rejected by iTunes, that may be because of a codec problem. However, there are also limitations on video codecs, sample rate, etc. mp4 file extension, generally you can play them in iTunes. Furthermore, works can become permanently inaccessible if the DRM scheme changes or if the service is discontinued.Īccording to Apple, iTunes supports any video format that works with QuickTime and files purchased or downloaded from iTunes store. Those opposed to DRM contend there is no evidence that DRM helps prevent copyright infringement, arguing instead that it serves only to inconvenience legitimate customers, and that DRM helps big business stifle innovation and competition.
Proponents argue that digital locks should be considered necessary to prevent "intellectual property" from being copied freely, just as physical locks are needed to prevent personal property from being stolen. Some content providers claim that DRM is necessary to fight copyright infringement online and that it can help the copyright holder maintain artistic control or ensure continued revenue streams. The use of digital rights management is not universally accepted. Digital rights management (DRM) is a class of controversial technologies that are used by hardware manufacturers, publishers, copyright holders, and individuals with the intent to control the use of digital content and devices after sale.
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