Viewer

Inspect images, video, audio, and live GPU output in one native presentation tool with a quiet shell, a spatial canvas, and media-aware controls.

ImageVideoAudioCanvas preview

OA Viewer presenting the Space Cathedral image edge to edge in fullspace mode — Image · Fullspace
The current presentation checkpoint gives the content the entire window while the GNOME-inspired shell stays available at the edges.

A canvas, not a frame

Fit media for context, zoom through native detail, pan without chrome competing for space, then move into fullspace presentation. The grid keeps scale and position legible without turning Viewer into an editor.

OA Viewer centering the Space Cathedral image on its navigable grid canvas — Image · Canvas
Fit-to-view preserves the image bounds and leaves the surrounding navigation field visible.

Canvas · Interaction

Zoom, pan, playback, and fullspace transitions in a 21.1-second 720p30 capture.

Video playback

Decoded frames retain their media timing and semantic image contract. Viewer adds a compact transport, stream identity, mute, brightness, and the same canvas/fullspace movement used for still images.

OA Viewer playing an H.264 Shibuya Crossing clip in fullspace mode — Video · Fullspace
Playback controls float over the decoded image and recede into the presentation surface.

OA Viewer playing an H.264 clip on its navigable grid canvas — Video · Canvas
The same timed stream can be reduced and navigated without leaving playback mode.

Audio, three ways

A single transport can move between waveform, spectrogram, and mel-spectrogram views. Each mode keeps the same playhead and media controls while changing the inspection surface.

OA Viewer audio transport displaying a waveform overview — Audio · Waveform
Amplitude over time for fast navigation and transient inspection.

OA Viewer audio transport displaying a green spectrogram — Audio · Spectrogram
Linear-frequency energy rendered as a time-frequency field.

OA Viewer audio transport displaying a warm mel spectrogram — Audio · Mel spectrogram
Perceptual frequency spacing for speech and learned-audio inspection.

Use Viewer

Input	Action
`Scroll wheel`	Zoom in or out
`Drag`	Pan the canvas
`+ / -`	Keyboard zoom in or out
`0`	Fit content to the window
`9`	Inspect at 100%
`1 / 2 / 3 / 4`	Inspect red, green, blue, or alpha as grayscale
`5`	Return to full RGB
`Arrow keys`	Step media frames or navigate temporal content
`Q / Esc`	Close Viewer

SDK examples

Executable examples own setup and API usage. Their Present sections show the exact application state or output reached by each source-owned workflow.

ExVision

Open the authored ML cover in OA’s native Vulkan viewer, inspect it on the navigable canvas, and move into fullspace presentation.

ExVision

Load the Vision cover, convert its GPU-resident RGB pixels to Rec.709 grayscale, save the semantic Gray image, and optionally inspect it in Viewer.

ExAudio

Load the OA narration, convert it to mono, normalize it, render a native GPU reverberation tail, then save a checked WAV output.

ExUi

Record one training-loss series, render the retained figure through OA's GPU compositor, save it, and optionally inspect it in Viewer.