MP4(3)

📦 version 2.1.0, in fedora 43, fedora 44

💖 MP4(3) — MP4 File Format Library 💖

okay bestie, welcome to the MP4(3) corner of the manual, the one and only MP4 File Format Library 🌸 like, this is the library's own little hangout spot, and we're about to talk about one very specific function. she's niche, she's precise, and honestly? she ate. 🎀

✨ NAME ✨

MP4SetSceneProfileLevel — sets the minimum MPEG-4 scene graph profile and level required to render the contents of the file 💅

like yeah that's the whole vibe of her. she sets the bar. literally.

🦋 SYNTAX 🦋

#include <mp4.h>

bool MP4SetSceneProfileLevel(
        MP4FileHandle hFile,
        u_int8_t profileLevel
)

not me showing you the exact signature because bestie we do NOT freestyle the arguments, ok?? copy it character for character, no cap. 🙈

🌈 ARGUMENTS 🌈

  • hFile — this is the mp4 file you're doing the operation on. the main character, if you will. your file. your girl. 👑
  • profileLevel — a u_int8_t holding the profile/level value you're setting. what values are even legal tho? scroll down, I got you. 🍓

💫 RETURN VALUES 💫

  • success? you get true (1). slay. ✨
  • error? you get false (0). 😭 it's giving sad.

that's it. that's the whole contract. periodt.

👑 DESCRIPTION 👑

okay so MP4SetSceneProfileLevel sets the minimum profile/level of MPEG-4 scene graph support that's necessary to render the contents of the file. like, how much scene graph machinery does a player need to have in order to even look at this file properly? that's what you're declaring here. 🫶

and ISO/IEC 14496-1:2001 MPEG-4 Systems defines these values, so here's the full menu, no skipping, we list all of them:

  • 0x00 — Reserved
  • 0x01 — Simple 2D Profile @ Level 1
  • 0x02-0x7F — Reserved
  • 0x80-0xFD — User private
  • 0xFE — No scene graph profile specified
  • 0xFF — No scene graph required

every single one, exactly as written, because the bit patterns do NOT play. 🔥

🔍 SEE ALSO 🔍

go read those too, bestie, the setter and the getter are a matched set, iykyk. 💜

and that's the whole page!! this one came from Cisco Systems Inc., Version 0.9, filed under MP4(3) — mwah, thanks for reading, you're doing amazing sweetie 💖✨🎀🦋

📦 where this page comes from