Hello,

I have encountered an uncommon issue with mp4decrypt, where it successfully decrypts an MP4 file, but the resulting decrypted audio track cannot be played correctly.

Here are the links to the raw audio and video MP4 segment files:
- Raw Audio MP4 Segment File: [Link](https://ufile.io/aqpb7dfi)
- Raw Video MP4 Segment File: [Link](https://ufile.io/vqk8tnuu)

Both tracks share the same decryption key: `49642d2151ac6c3f8453bbfc4b3fdfc0`.

The video segment decrypts successfully and can be played and viewed without any issues (e.g., using VLC).

However, the audio segment does not decrypt correctly, despite mp4decrypt not reporting any errors.

By inspecting the mp4 structure It can be observed that the only difference between those two segments is that audio one does not have senc, saiz and saio boxes at all.




mp4dcrypt not decrypting correctly
This is a GitHub Issue
repo:Bento4
owner:axiomatic-systems
Title : mp4dcrypt not decrypting correctly
Issue date:

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Hello,

I have encountered an uncommon issue with mp4decrypt, where it successfully decrypts an MP4 file, but the resulting decrypted audio track cannot be played correctly.

Here are the links to the raw audio and video MP4 segment files:
- Raw Audio MP4 Segment File: [Link](https://ufile.io/aqpb7dfi)
- Raw Video MP4 Segment File: [Link](https://ufile.io/vqk8tnuu)

Both tracks share the same decryption key: `49642d2151ac6c3f8453bbfc4b3fdfc0`.

The video segment decrypts successfully and can be played and viewed without any issues (e.g., using VLC).

However, the audio segment does not decrypt correctly, despite mp4decrypt not reporting any errors.

By inspecting the mp4 structure It can be observed that the only difference between those two segments is that audio one does not have senc, saiz and saio boxes at all.




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