How to get RAW Metadata byte[]

[Unreal-System]

This question is similar to it
https://stackoverflow.com/questions/22695723/create-valid-wav-file-header-for-streams-in-memory/63292656#63292656

Is there a method like ToBytesArray()?

[Zeugma440]

Could you please explain what you are trying to acheive ?

[Zeugma440]

You're lucky, it looks like the library already has the info you need for OGG files.

• The offset of the Vorbis identification packet is always 0, as that packet must be the first one of the file;
• The identification packet is always followed by the Vorbis comment packet, followed itself by the Vorbis setup packet ;
• The offset for the last byte of the Vorbis setup packet is given by Track.TechnicalInformation.AudioDataOffset - 1.

=> If you extract bytes 0 to Track.TechnicalInformation.AudioDataOffset - 1 (included), you should have what you asked for.

Please tell me if that works for you

[Unreal-System]

No need for Track.TechnicalInformation.AudioDataOffset - 1,extract bytes 0 to Track.TechnicalInformation.AudioDataOffset (included) and this will work fine!
Let's keep trying the others!

I apologize for being a little late in responding today, but the nature of my job is such that it takes up random time to work.

[Zeugma440]

Good news !! I'm glad to see it works 😄

As for the others :

• OPUS : OPUS is very similar to OGG. Using the same algorithm as OGG should normally work
• MP3 : If you need the MP3 technical header, you should extract bytes Track.TechnicalInformation.AudioDataOffset to Track.TechnicalInformation.AudioDataOffset + 4, as the header is only 4-bytes long
• WEBM : ATL currently doesn't support Matroska and its sibling formats. See Matroska audio container support  #57

[Unreal-System]

Hmmm... Track.TechnicalInformation.AudioDataOffset is universal for most formats?

[Zeugma440]

Yes it is, but it doesn't directly answer your needs : it marks the beginning of audio data, while you're looking for the beginning and the end of the native headers (at least that's what you got with OGG).

More information about that field here : #90