MediaCodec

Android 11 includes a new MediaCodec APIs that gives apps more control when allocating input and output buffers. This lets your app manage memory more efficiently

MediaCodec class can be used to access low-level media codecs, i.e. encoder/decoder components. It is part of the Android low-level multimedia support infrastructure.

MediaCodec is also a part of NDK.

MediaCodec: MediaCodec.LinearBlock, MediaCodec.OutputFrame, MediaCodec.QueueRequest

MediaParser

MediaParser is a new low-level API for media extraction. It is more flexible than MediaExtractor and provides additional control over media extraction functionality.

https://developer.android.com/reference/android/media/MediaParser

Proposed Action:

• NDK MediaCodec is used qandroidaudiodecoder. Check the usage of the new packages, but I did not see any issue that could be related.
• MediaParser can help with an issue regarding audio track metadata inside a video file, but only Android API 30 forward.