Enum OutputContainer 

#[non_exhaustive]
pub enum OutputContainer {
    Mp4,
    FMp4,
    WebM,
    Mkv,
    Avi,
    Mov,
    Flac,
    Ogg,
}

Output container format for encoding.

The container format is usually auto-detected from the file extension, but can be explicitly specified if needed.

Named OutputContainer (rather than Container) to avoid confusion with ff_format::ContainerInfo, which describes a container read from a probed file.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Mp4

MP4 / QuickTime

FMp4

Fragmented MP4 — CMAF-compatible streaming container.

Uses the same mp4 FFmpeg muxer as OutputContainer::Mp4 but with movflags=+frag_keyframe+empty_moov+default_base_moof applied before writing the header. Required for HTTP Live Streaming fMP4 segments (CMAF) and MPEG-DASH.

WebM

WebM

Mkv

Matroska

Avi

AVI

Mov

MOV

Flac

FLAC (lossless audio container)

Ogg

OGG (audio container for Vorbis/Opus)

Implementations

impl OutputContainer

pub const fn as_str(self) -> &'static str

Get FFmpeg format name.

pub const fn default_extension(self) -> &'static str

Get default file extension.

pub fn from_path(path: &Path) -> Option<Self>

Guess the container from a file path’s extension.

Mirrors default_extension in reverse and is case-insensitive. Returns None for an unknown or missing extension. The mp4 extension maps to progressive Mp4, never fragmented FMp4, which must be selected explicitly.

pub const fn is_fragmented(self) -> bool

Returns true if this container is fragmented MP4.

When true, the encoder applies movflags=+frag_keyframe+empty_moov+default_base_moof before writing the file header, enabling CMAF-compatible streaming output.

pub const fn supports_faststart(self) -> bool

Returns true if this container supports the +faststart movflag.

faststart (moving the moov atom to the front for progressive download) is specific to the mp4/mov muxers, so it applies only to Mp4 and Mov. Fragmented MP4 (FMp4) already streams and uses its own movflags, so it is excluded.

Trait Implementations

impl Clone for OutputContainer

fn clone(&self) -> OutputContainer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for OutputContainer

impl Debug for OutputContainer

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

Formats the value using the given formatter.

impl Eq for OutputContainer

impl PartialEq for OutputContainer

fn eq(&self, other: &OutputContainer) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for OutputContainer