avfoundation-media-pipeline-workflowlisted

# AVFoundation Media Pipeline Workflow ## Purpose Guide AVFoundation capture, playback, asset loading, reader, writer, export, and sample-buffer pipeline design and repair. This skill owns media-pipeline shape, typed AVFoundation surface choice, and back-pressure policy, while leaving app audio-session policy, engine graphs, Core Media timing internals, and Xcode execution to their owning skills. ## When To Use - Use this skill for `AVCaptureSession`, capture inputs and outputs, capture queues, `AVPlayer`, `AVPlayerItem`, `AVAsset`, `AVURLAsset`, `AVAsyncProperty`, async asset loading, `AVAssetReader`, `AVAssetWriter`, export, transcode, and sample-buffer append loops. - Use this skill when existing code blocks the main thread, uses deprecated AVAsset synchronous properties, misuses `loadValuesAsynchronously(forKeys:)`, appends sample buffers without back-pressure, confuses capture authorization with microphone permission, or mixes capture, UI, writer, and player ownership in one object. - Recommend `avfaudio-session-workflow` when the primary problem is app audio intent, routes, interruptions, or microphone permission. - Recommend `coremedia-timing-samplebuffer-workflow` when the primary issue is sample-buffer timestamps, format descriptions, timebases, clocks, or synchronization. - Recommend `camera-capture-depth-workflow` when the primary issue is camera discovery, device controls, formats, rotation, photo capture, depth, calibration, synchronized camera outputs, or co