Module adapt 

Animation as a layer over the video model, both ways, through the real zencodec animation traits.

• VideoAnimationDecoder implements AnimationFrameDecoder over a Demuxer and a VideoDecoder. A frame lasts until the next one’s presentation timestamp; the last one lasts the explicit final_duration (IVF, WebM and MP4 do not reliably record it). Frames carry their timestamp in AnimationFrame::pts.
• AnimationVideoEncoder implements AnimationFrameEncoder over a VideoEncoder and a Muxer. Durations become timestamps on the encoder’s clock, exactly or not at all (UnsupportedOperation::AnimationTiming). Its begin and pending_output map onto the muxer’s pull output, so animation output streams when the muxer’s does.

Turning planes into a packed canvas and back is a colour conversion, and colour conversion belongs to zenpixels-convert, not to a codec contract. The adapters take it as a RenderFrame / CaptureFrame; Gray8 is the identity for 8-bit monochrome.

Structs

AnimationVideoEncoder

A full-canvas animation encoder over a video encoder and a muxer.

Gray8

The identity conversion for 8-bit monochrome: one luma plane to GRAY8_SRGB and back.

VideoAnimationDecoder

A composited-canvas animation view over a demuxed, decoded video: the first video track, in presentation order.

Enums

AdaptError

Failure of an adapter. A is the first stage’s error (demuxer or encoder), B the second’s (decoder or muxer).

Traits

CaptureFrame

Makes a frame from packed pixels: the step between the animation API and a video encoder.

RenderFrame

Writes a decoded frame onto a packed canvas: the step between a video decoder and the animation API.