MP4(3)

💖 MP4(3) 💖

okay bestie, welcome to the MP4 File Format Library manual, section 3, page MP4(3) 🎀 this one's short, sweet, and honestly kinda niche, but you're gonna slay it. no cap.

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🌸 NAME 🌸

MP4SetVideoProfileLevel — sets the minimum MPEG-4 video profile and level required to render the contents of the file ✨

like... it's the vibe gatekeeper of your video. it says "you need at least this much MPEG-4 to even look at this file." 💅

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✨ SYNTAX ✨

#include <mp4.h>

bool MP4SetVideoProfileLevel(
        MP4FileHandle hFile,
        u_int8_t profileLevel
)

yep, that's the whole thing. two arguments. very demure, very mindful. 🧚

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🎀 ARGUMENTS 🎀

• hFile — specifies the mp4 file to which the operation applies. like, which file are we doing this to, bestie? that one. 🫶

lowkey noticing the original lists only hFile here and not profileLevel?? okay so we're just not gonna talk about it. moving on. 🙈

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🫶 RETURN VALUES 🫶

• Upon success, true (1). 🥳
• Upon an error, false (0). 😭

that's it. one bit of emotional whiplash. iconic.

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👑 DESCRIPTION 👑

MP4SetVideoProfileLevel sets the minimum profile/level of MPEG-4 video support necessary to render the contents of the file. it's literally telling the world "hey, you need this much decoder to play me." no more, no less. 🔥

ISO/IEC 14496-1:2001 MPEG-4 Systems defines the following values, and bestie you will be memorizing these, sorry, I don't make the rules:

• 0x00 — Reserved 💀
• 0x01 — Simple Profile @ Level 3
• 0x02 — Simple Profile @ Level 2
• 0x03 — Simple Profile @ Level 1
• 0x04 — Simple Scalable Profile @ Level 2
• 0x05 — Simple Scalable Profile @ Level 1
• 0x06 — Core Profile @ Level 2
• 0x07 — Core Profile @ Level 1
• 0x08 — Main Profile @ Level 4
• 0x09 — Main Profile @ Level 3
• 0x0A — Main Profile @ Level 2
• 0x0B — N-Bit Profile @ Level 2
• 0x0C — Hybrid Profile @ Level 2
• 0x0D — Hybrid Profile @ Level 1
• 0x0E — Basic Animated Texture @ Level 2
• 0x0F — Basic Animated Texture @ Level 1
• 0x10 — Scalable Texture @ Level 3
• 0x11 — Scalable Texture @ Level 2
• 0x12 — Scalable Texture @ Level 1
• 0x13 — Simple Face Animation @ Level 2
• 0x14 — Simple Face Animation @ Level 1
• 0x15-0x7F — Reserved 🚫
• 0x80-0xFD — User private 🤫
• 0xFE — No audio profile specified
• 0xFF — No audio required

not me reading 0xFE and 0xFF in a video profile function and going "...audio??" 💀 yes bestie, that's genuinely what it says. the spec said what it said. we don't question the spec. 🙈

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🌈 SEE ALSO 🌈

• MP4(3)
• MP4GetVideoProfileLevel(3)

go read those too, they're the sibling energy to this one 🦋

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and that's the whole page, bestie!! brought to you by Cisco Systems Inc., Version 0.9 — yeah, 0.9, she's a little vintage, we love her anyway 💜 mwah, go set some profile levels, you're doing amazing sweetie ✨🎀💖