Crate oxideav_sub_image 

Bitmap-native subtitle formats for oxideav.

These subtitle formats don’t carry text — each cue is a picture that overlays the video. The decoders in this crate therefore produce oxideav_core::Frame::Video values holding an RGBA canvas sized to the subtitle’s display context (either the declared video frame size or the bitmap’s own size, depending on format), not oxideav_core::Frame::Subtitle.

Format	Codec id	Container name	Extensions
PGS	pgs	pgs	.sup
DVB sub	dvbsub	(none)	rides MPEG-TS
VobSub	vobsub	vobsub	.idx+.sub

Scope

• PGS supports both decode and encode.
• DVB subtitles and VobSub are decode-only for now. DVB subs need a TS-aware muxer upstream; VobSub needs the .idx+.sub pair written in lock-step which this crate doesn’t yet expose.
• One RGBA oxideav_core::VideoFrame is emitted per display-set (cue change) — either the full video-canvas-sized frame (PGS/DVB) or the bitmap’s own rectangle (VobSub).
• Output pixel format is always oxideav_core::PixelFormat::Rgba.
• pts on the emitted frame matches the cue start time (in the packet’s oxideav_core::TimeBase). Duration is carried on the oxideav_core::Packet the container emits.

See per-module docs for format-specific limitations.

Modules

composite

Alpha-aware RGBA compositing primitives shared by the bitmap-subtitle decoders.

dvbsub

DVB subtitle decoder (ETSI EN 300 743).

pgs

PGS / HDMV / Blu-ray .sup parser, container, and decoder.

vobsub

VobSub / DVD SPU parser, container (.idx+.sub), and decoder.

Constants

DVBSUB_CODEC_ID

Codec id for DVB subtitle streams (ETSI EN 300 743).

PGS_CODEC_ID

Codec id for PGS / HDMV / Blu-ray .sup streams.

VOBSUB_CODEC_ID

Codec id for VobSub / DVD SPU streams.

Functions

register

Unified registration entry point — installs PGS / DVB / VobSub codecs into the codec sub-registry and the PGS + VobSub containers into the container sub-registry of the supplied RuntimeContext.

register_codecs

Register decoders for PGS, DVB subtitles, and VobSub.

register_containers

Register the PGS (.sup) and VobSub (.idx+.sub) containers.