# Video decoder not working

**URL:** <https://forums.steinberg.net/t/video-decoder-not-working/867833>\
**Category:** Cubase\
**Tags:** video-engine, cubase-12\
**Created:** [September 11, 2023, 2:25am UTC](https://forums.steinberg.net/t/video-decoder-not-working/867833 "2023-09-11T02:25:33Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![composertrombone](https://avatars.discourse-cdn.com/v4/letter/c/a3d4f5/32.png) [@composertrombone](https://forums.steinberg.net/u/composertrombone)\
**Post date:** [September 11, 2023, 2:25am UTC](https://forums.steinberg.net/t/video-decoder-not-working/867833/1 "2023-09-11T02:25:33Z")

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Hello,

I’m having an issue with the video decoder for Avid DNxHD(R).

I’ve purchase the decoder, activated it, but it still cannot read _mov._ files, or anything other than mp4. Not sure what to do next to make it work.

Thanks for your help!

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**Author:** ![steve77](https://avatars.discourse-cdn.com/v4/letter/s/a87d85/32.png) [@steve77](https://forums.steinberg.net/u/steve77)\
**Post date:** [September 11, 2023, 7:28am UTC](https://forums.steinberg.net/t/video-decoder-not-working/867833/2 "2023-09-11T07:28:59Z")

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Both QuickTime movies (.mov) and MP4 are only containers.

Wether you can open files will depend on how the media is actually encoded.

Are you sure your media is DNxHD? This would usually come in a MXF container (.mxf)

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**Author:** ![composertrombone](https://avatars.discourse-cdn.com/v4/letter/c/a3d4f5/32.png) [@composertrombone](https://forums.steinberg.net/u/composertrombone)\
**Post date:** [September 12, 2023, 2:12am UTC](https://forums.steinberg.net/t/video-decoder-not-working/867833/3 "2023-09-12T02:12:58Z")

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Yes, the problem is that I’ve bought the decoder, but when I import a video, I get this message from cubase saying I need to purchase the decoder. But it’s already bought and activated.

 ![Screen Shot 2023-09-12 at 12.11.25 pm](https://europe1.discourse-cdn.com/steinberg/original/3X/1/1/116c8f1ea31a2bed5639d2ff941896cc675b8b0d.jpeg)

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**Author:** ![Johnny\_Moneto](https://dub1.discourse-cdn.com/steinberg/user_avatar/forums.steinberg.net/johnny_moneto/32/329861_2.png) [@Johnny\_Moneto](https://forums.steinberg.net/u/Johnny_Moneto)\
**Post date:** [September 12, 2023, 5:14am UTC](https://forums.steinberg.net/t/video-decoder-not-working/867833/4 "2023-09-12T05:14:09Z")

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Did you already activate the license in Steinberg’s Activation Manager?

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<div class="post-metadata">

**Author:** ![composertrombone](https://avatars.discourse-cdn.com/v4/letter/c/a3d4f5/32.png) [@composertrombone](https://forums.steinberg.net/u/composertrombone)\
**Post date:** [September 12, 2023, 5:19am UTC](https://forums.steinberg.net/t/video-decoder-not-working/867833/5 "2023-09-12T05:19:23Z")

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Yes I did. All activated

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**Author:** ![reberclark](https://dub1.discourse-cdn.com/steinberg/user_avatar/forums.steinberg.net/reberclark/32/2228_2.png) [@reberclark](https://forums.steinberg.net/u/reberclark)\
**Post date:** [September 12, 2023, 3:35pm UTC](https://forums.steinberg.net/t/video-decoder-not-working/867833/6 "2023-09-12T15:35:43Z")

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If on Windows - installed as Administrator?

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<div class="post-metadata">

**Author:** ![composertrombone](https://avatars.discourse-cdn.com/v4/letter/c/a3d4f5/32.png) [@composertrombone](https://forums.steinberg.net/u/composertrombone)\
**Post date:** [September 13, 2023, 11:58pm UTC](https://forums.steinberg.net/t/video-decoder-not-working/867833/7 "2023-09-13T23:58:37Z")

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Ah sorry I’m on Mac here