MP4(3)

💖 MP4(3) — MP4 File Format Library 💖

okay bestie, so this is a page from the MP4 File Format Library manual, and honestly? it's a little niche but it's giving very specific energy and we love her for it.

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✨ NAME ✨

MP4SetAudioProfileLevel — sets the minimum MPEG-4 audio profile and level required to render the contents of the file 🎧

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🌸 SYNTAX 🌸

#include <mp4.h>

bool MP4SetAudioProfileLevel(
        MP4FileHandle hFile,
        u_int8_t profileLevel
)

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🎀 ARGUMENTS 🎀

• hFile — the mp4 file you're doing the operation on. that's the one. that's the girl. 💅

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🦋 RETURN VALUES 🦋

• success? true (1). slay. ✨
• error? false (0). not slay. 😭

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💜 DESCRIPTION 💜

MP4SetAudioProfileLevel sets the minimum profile/level of MPEG-4 audio support that's actually necessary to render the contents of the file. like, it's telling the world "hey, this is the least fancy audio setup that can handle me." no cap. 🔥

ISO/IEC 14496-1:2001 MPEG-4 Systems defines the following values, and bestie you will be memorizing them, iykyk:

• 0x00 — Reserved
• 0x01 — Main Profile @ Level 1
• 0x02 — Main Profile @ Level 2
• 0x03 — Main Profile @ Level 3
• 0x04 — Main Profile @ Level 4
• 0x05 — Scalable Profile @ Level 1
• 0x06 — Scalable Profile @ Level 2
• 0x07 — Scalable Profile @ Level 3
• 0x08 — Scalable Profile @ Level 4
• 0x09 — Speech Profile @ Level 1
• 0x0A — Speech Profile @ Level 2
• 0x0B — Synthesis Profile @ Level 1
• 0x0C — Synthesis Profile @ Level 2
• 0x0D — Synthesis Profile @ Level 3
• 0x0E-0x7F — Reserved
• 0x80-0xFD — User private
• 0xFE — No audio profile specified
• 0xFF — No audio required

so like, Main Profile @ Level 1 through 4? those are the main characters 👑. Scalable? she scales 💅. Speech and Synthesis are out here doing their own thing 🌈. and then the reserved ranges are just sitting there, reserved, minding their business 🙈. 0x80 through 0xFD is user private, which is lowkey iconic — that's your playground. 0xFE means no audio profile got specified, and 0xFF means no audio required at all, which is the audio equivalent of "not me, I'm just here for the vibes." 💀

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⭐ SEE ALSO ⭐

• MP4(3)
• MP4GetAudioProfileLevel(3)

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and that's the whole page bestie, you ate it, periodt 💖

this masterpiece brought to you by Cisco Systems Inc., churning out Version 0.9 of this lib like the icons they are. go forth and set your audio profile levels responsibly 🫶✨