MP4(3)

✨ NAME ✨

Okay bestie, welcome to the MP4 File Format Library manual page, aka MP4(3)! 🫶 This one is all about MP4GetTrackNumberOfSamples — literally the glow-up that tells you the number of samples in a track. No cap. 💅

✨ SYNTAX ✨

Like, here's the vibe check for your C code:

       #include <mp4.h>

       u_int32_t MP4GetTrackNumberOfSamples(
            MP4FileHandle hFile,
            MP4TrackId trackId
       )

✨ ARGUMENTS ✨

• hFile — this one specifies the mp4 file to which the operation applies. It's the main character of the file world. 🎬
• trackId — this one specifies the track for which the number of samples is desired. Like, which track are we counting, bestie? 🎵

✨ RETURN VALUES ✨

Upon success, you get the number of samples in the track. Upon an error, you get 0. So if you see 0, something went wrong — not me crying 😭.

✨ DESCRIPTION ✨

MP4GetTrackNumberOfSamples returns the number of samples in the specified track in the mp4 file. And here's the tea: sample id's are the consecutive sequence of numbers from 1 to the total number of samples, i.e. 1-based indexing, not 0-based indexing. So the first sample is 1, not 0. It's giving old-school, but that's the vibe. 💖

✨ SEE ALSO ✨

• MP4(3) — go check out the main MP4 page, bestie. It's the parent energy. 👑

And that's the whole page, periodt. 💅 This iconic little manual page is brought to you by Cisco Systems Inc., version 0.9, and it's literally called MP4(3). Stay slaying with your samples, bestie. 🦋✨