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Error When Opening Avid DNxHD Encoded Files in Apple Quicktime

Modified on: 2019-10-15 17:03:52 +0100

Issue

When attempting to open an AVID DNxHD file in QuickTime 10, you are asked for a MediaSeal Authentication Password, which you enter correctly. The authentication is successful, however QuickTime reports that the file is not a valid QuickTime file.

Cause

DNxHD is a codec specifically created by AVID for use in AVID Applications such as Pro Tools.

AVID DNxHD formats are not supported by the latest versions of Apple’s QuickTime player.

Solution

In order to view DNxHD files, you will need to install the AVID Codec LE and use a Media Player that supports the DNxHD codecs e.g. QuickTime 7

Download link to Codec:

http://avid.force.com/pkb/articles/en_US/download/Avid-QuickTime-Codecs-LE

Download link to QuickTime 7:

https://support.apple.com/kb/dl923?locale=en_US

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Technical Support

From 01/05/2022 technical support will only be provided to Operating Systems which are currently supported by Apple and Microsoft, or have been unsupported by Apple and Microsoft for less than 3 years. As of May 2022, this means technical support will be provided for Operating Systems newer than macOS 10.12 and Windows 7 SP1. MediaSeal will remain compatible with all existing Operating Systems, and our technical support team will endeavour to assist on all issues. However, long term support will not continue with issues on older Operating Systems should they not be resolved within a reasonable time.

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