Struct FragmentedOptions 

pub struct FragmentedOptions {
    pub cadence: FragmentCadence,
    pub styp: Option<BrandPreset>,
    pub emit_random_access_indexes: bool,
}

Fragmented-MP4 muxer options.

When Mp4MuxerOptions::fragmented is Some(FragmentedOptions { .. }), the muxer writes the file as

ftyp
moov                    (mvex+trex; no media samples in moov)
sidx?                   (one per fragment, references the next moof+mdat)
styp? + moof + mdat     (per fragment, repeated)
sidx? + styp? + moof + mdat
...
mfra?                   (at end: per-track tfra + mfro size trailer)

matching ISO/IEC 14496-12 §8.8 (Movie Fragments) + §8.16 (sidx) + §8.8.10 (mfra) + DASH-IF Interop guidelines for styp brands.

Fields

cadence: FragmentCadence

When to flush a fragment; see FragmentCadence.

styp: Option<BrandPreset>

Emit a styp SegmentTypeBox before each moof+mdat pair (CMAF segment marker). When None, no styp is written and the file is a plain fragmented ISOBMFF (still valid for any DASH parser, but not a CMAF-conformant addressable segment).

DASH-IF Interop §6.2 recommends styp(major=msdh, compat=msdh msix) for an indexed media segment, or cmfs / cmff for CMAF brand signalling. The default Some(BrandPreset::Custom { major: msdh, compatible: [msdh, msix] }) is the broadly-interop choice.

emit_random_access_indexes: bool

Emit sidx (SegmentIndexBox §8.16.3) before each moof+mdat and an mfra (MovieFragmentRandomAccessBox §8.8.10) trailer with per-track tfra random-access tables + the size-of-mfra mfro at end of file. Required for the DASH on-demand profile (single file with embedded byte-range index) and for fast random-access without scanning every moof. Default true.

The emitted sidx is a single-entry index covering the immediately- following moof+mdat (the simplest legal form per §8.16.3); a multi-segment top-level sidx can be layered on by an outer segmenter if needed.

Trait Implementations

impl Clone for FragmentedOptions

fn clone(&self) -> FragmentedOptions

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FragmentedOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for FragmentedOptions

fn default() -> Self

Returns the “default value” for a type.