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AIMP for Windows => Вопросы / Questions => Topic started by: Biff on April 10, 2025, 00:18:24

Title: Decoder was not found for this format?
Post by: Biff on April 10, 2025, 00:18:24

This message appears when I try to play .m4a files:

File: I:\j\John Williams - Indiana Jones and the Dial of Destiny (2023)\02 - Helena's Theme.m4a
Code: -1 (FFFFFFFF)
Message: Decoder was not found for this format.

What could I do to play them?

Title: Re: Decoder was not found for this format?
Post by: Алексей Долматов on April 10, 2025, 00:27:13

Need a sample file. If mediainfo determines it, then you can add information from it.

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To check: make sure that plugins are active and the option to use system decoders is enabled.

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Also, be sure to indicate the exact version of the player and the exact version of the system.

Title: Re: Decoder was not found for this format?
Post by: sveakul on April 18, 2025, 22:18:09

Quote from: Biff on April 10, 2025, 00:18:24

This message appears when I try to play .m4a files:

File: I:\j\John Williams - Indiana Jones and the Dial of Destiny (2023)\02 - Helena's Theme.m4a
Code: -1 (FFFFFFFF)
Message: Decoder was not found for this format.

What could I do to play them?

Do you get the message for ALL .m4a files?  Be sure that Prefs/Plugins/Decoders/Advanced Audio Coding v2.4.6.1 is present and active/checked.

If not present, check that the folder bass_aac exists with bass_aac.dll in your plugins directory.  If they don't, add them (can be extracted with 7-Zip from the file
https://www.aimp.ru/?do=download.file&id=31 (https://www.aimp.ru/?do=download.file&id=31) or your backup directory).

If it is, try un-checking Sound Output/Transform/Allow System Decoder Usage.