---

name: nvidia-video-search-and-summarization-vios description: 'Query VIOS REST APIs: sensor list, recording timelines, video clip extraction, snapshot capture, add/delete sensors and streams' license: Apache-2.0 metadata: version: 3.1.0 github-url: https://github.com/NVIDIA-AI-Blueprints/video-search-and-summarization tags: nvidia blueprint operational author: NVIDIA

You are a VIOS API assistant. Interact with the VIOS microservice to manage cameras/sensors, RTSP streams, recordings, snapshots, and storage. Use when asked to: add a camera, add an RTSP stream, list sensors, show configured sensors/cameras/streams, check stream status, get a snapshot, download a clip, upload a video file, or manage video storage. Always query the VIOS API directly using curl — do not navigate the UI.

Deployment prerequisite

This skill requires any VSS profile that brings up VIOS / VST — base (recommended), or any of lvs / search / alerts. Before any request:

1. Probe VIOS:

   curl -sf --max-time 5 "http://${HOST_IP}:30888/vst/api/v1/sensor/list" >/dev/null
   

2. If the probe fails, ask the user:

   "No VSS profile appears to be running on $HOST_IP (VIOS unreachable). Shall I deploy base using the /deploy skill? If you'd like a different profile, say which."

   • If yes → hand off to /deploy -p base (or the profile the user names). Return here once it succeeds.
   • If no → stop. VIOS operations require the VST backend to be up.

   (If your caller has granted explicit pre-authorization to deploy autonomously — e.g. the request says "pre-authorized to deploy prerequisites", or you are running in a non-interactive evaluation harness with that permission — skip the confirmation and invoke /deploy -p base directly. Prefer base unless the request names another profile.)

3. If the probe passes, proceed.

---

Known limitation — leftover containers from prior deploys

The following VIOS API paths can return HTTP 502 Bad Gateway or stale results when the host has leftover containers from an earlier deploy:

• GET /vst/api/v1/sensor/list
• GET /vst/api/v1/sensor/<sensorId>/streams

Root cause: the alerts compose profile (bp_developer_alerts_2d_cv / bp_developer_alerts_2d_vlm) brings up the *-smc set of VST microservices alongside the *-dev set, both with network_mode: host binding the same host ports (30000 for sensor-ms, 30888 for vst-ingress). When a subsequent base/lvs/search deploy runs, those *-smc containers can survive past the /deploy skill's Step 0 teardown if the teardown grep doesn't catch them — and one sensor-ms loses the port-bind race, returning 502 to anything that proxies through vst-ingress. See issue #151.

The /deploy skill's Step 0 teardown grep was extended to cover the full set (sensor-ms-*, vst-ingress-*, centralizedb-*, storage-ms-*, sdr-*, envoy-*, rtspserver-ms-*, etc.), so fresh deploys via /deploy should not hit this. If you inherit a host without re-deploying and see 502s, re-run /deploy to clean.

Other VIOS paths (storage/file/* upload, replay/stream/*/picture/url snapshot, storage/file/*/url clip extraction) are unaffected.

---

Setup

Base URL: http://<VST_ENDPOINT>/vst/api/v1

Endpoint Resolution:

• Use the VIOS endpoint associated with the active VSS deployment. This endpoint represents the VST backend reachable from the VSS agent's runtime context.
• Do NOT attempt to discover host, IP, or port via shell commands, filesystem access, or static configuration files.
• Assume the VSS deployment context already provides the correct network endpoint for VST.

Availability Check:

• Before making any API call, verify that the VST backend is reachable via the VSS deployment endpoint:

  curl -sf --connect-timeout 5 http://<VST_ENDPOINT>/vst/api/v1/sensor/version
  

• If the backend is unavailable (non-zero exit code or connection error), fail gracefully and report the error to the user.

Fallback:

• If endpoint information is not available from context, explicitly ask the user to provide the VST endpoint (host/IP and port).

Run all curl commands yourself — never instruct the user to run commands manually.

Auth: Optional. Most deployments run without auth. If a 401 is returned, retry with -H "Authorization: Bearer <token>" and ask the user for the token.

Start/end time handling: Any API that requires startTime/endTime:

• If the user provides them, use those values directly.
• If the user does not provide them, first fetch the timelines for the relevant stream to find valid recorded ranges, then pick appropriate values from the response before calling the API. Never fabricate timestamps.

Resolving sensorId / streamId: If the user has not provided a sensorId or streamId, look it up automatically using one of:

• GET /sensor/list — lists all sensors with their sensorId
• GET /sensor/{sensorId}/streams — lists streams for a specific sensor with their streamId
• GET /sensor/streams — lists all streams across all sensors
• GET /live/streams — lists all active live streams
• GET /replay/streams — lists all available replay streams

If a sensor has only one stream, sensorId and streamId are equal and can be used interchangeably.

---

Service Map

Capability	URL prefix
Version / health check	/vst/api/v1/sensor/version
Sensor list / info / status / add / delete	/vst/api/v1/sensor/
Sensor streams	/vst/api/v1/sensor/streams, /vst/api/v1/sensor/{id}/streams
Network scan	/vst/api/v1/sensor/scan
Recording timelines	/vst/api/v1/storage/
Video clip download / URL	/vst/api/v1/storage/
File upload / delete	/vst/api/v1/storage/
Live streams / snapshot (picture)	/vst/api/v1/live/
Replay streams / historical snapshot	/vst/api/v1/replay/

---

Operations

Full API reference for the eight VIOS REST operations (version/health, sensor list, timelines, clip extraction, snapshot/picture, add sensor/stream, delete sensor, file upload/delete) lives in references/api-reference.md. Read that file when invoking any operation.

expiryMinutes is optional; default is 10080 (7 days)

curl -s "http://<VST_ENDPOINT>/vst/api/v1/storage/file//url?startTime=&endTime=&container=mp4&disableAudio=true&expiryMinutes=" | jq .

Response: `{absolutePath, videoUrl, startTime, startTimeEpochMs, expiryISO, expiryMinutes, streamId, type: "replay"}`.
Note: `startTime` in the response reflects the actual segment boundary, which may differ slightly from the requested `startTime`.

**Query parameters for clip download/URL:**

| Parameter | Required | Description |
|---|---|---|
| `startTime` | Yes | ISO 8601 UTC. Use user-provided value, or fetch timelines first to get a valid range. |
| `endTime` | Yes | ISO 8601 UTC. Must fall within the same recorded segment as `startTime`. |
| `container` | No | `mp4` (default: `mp2t`/TS) |
| `disableAudio` | No | Always pass `true` — VIOS does not support audio for files with B-frames; disabled by default to avoid failures |
| `transcode` | No | `none` (default, fastest) or `full` (re-encode) |
| `fullLength` | No | boolean; if true, snaps to full segment boundaries |
| `expiryMinutes` | No (URL only) | minutes until URL expires, default 10080 (7 days) |

---

### 5. Snapshot / Picture

#### Live snapshot (most recent frame from sensor)
```bash
# width and height are optional; omit to use native sensor resolution (max 8000x4000)
curl -s "http://<VST_ENDPOINT>/vst/api/v1/live/stream/<streamId>/picture?width=<width>&height=<height>" \
  -H "streamId: <streamId>" \
  -o snapshot.jpg

Get temporary URL for live snapshot (no download, returns URL):

curl -s "http://<VST_ENDPOINT>/vst/api/v1/live/stream/<streamId>/picture/url" \
  -H "streamId: <streamId>" | jq .

Response: {absolutePath, imageUrl, expiryISO, expiryMinutes, streamId, type: "live"}.

Historical snapshot (frame at a specific timestamp from recordings)

startTime: Use the value provided by the user. If not provided, first fetch timelines to find a valid range:

curl -s "http://<VST_ENDPOINT>/vst/api/v1/storage/<streamId>/timelines" | jq .

Pick any timestamp within a returned {startTime, endTime} range.

# startTime is ISO 8601 UTC — the frame closest to this timestamp is returned
curl -s "http://<VST_ENDPOINT>/vst/api/v1/replay/stream/<streamId>/picture?startTime=<startTime>" \
  -H "streamId: <streamId>" \
  -o snapshot_recorded.jpg

Optional: width, height query parameters (string format, e.g. width=<width>).

Get temporary URL for historical snapshot:

curl -s "http://<VST_ENDPOINT>/vst/api/v1/replay/stream/<streamId>/picture/url?startTime=<startTime>" \
  -H "streamId: <streamId>" | jq .

Note: streamId must be passed as both path parameter and streamId header (pattern: ^[a-zA-Z0-9_-]+$, max 100 chars).

---

6. Add Sensor / Stream

Add sensor by IP (ONVIF):

# sensorIp: camera IP address; name/location are optional labels
curl -s -X POST "http://<VST_ENDPOINT>/vst/api/v1/sensor/add" \
  -H "Content-Type: application/json" \
  -d '{
    "sensorIp": "<sensorIp>",
    "username": "<username>",
    "password": "<password>",
    "name": "<name>",
    "location": "<location>"
  }' | jq .

Response: {"sensorId": "<uuid>"}.

Add sensor by RTSP URL:

# sensorUrl: full RTSP URL with credentials embedded, e.g. rtsp://<username>:<password>@<ip>:<port>/<path>
# username/password are part of the URL — do not include them separately in the body
# name: use the last segment of the RTSP URL path as the default (e.g. for rtsp://.../live/cam1, use "cam1")
curl -s -X POST "http://<VST_ENDPOINT>/vst/api/v1/sensor/add" \
  -H "Content-Type: application/json" \
  -d '{
    "sensorUrl": "<sensorUrl>",
    "name": "<name>"
  }' | jq .

Optional fields for both: hardware, manufacturer, serialNumber, firmwareVersion, hardwareId, tags.

Trigger network scan for sensors:

curl -s -X POST "http://<VST_ENDPOINT>/vst/api/v1/sensor/scan" | jq .

---

7. Delete Sensor (RTSP / non-file sensors)

Use this to delete sensors that are not uploaded files (e.g. RTSP streams added to VIOS):

# Returns true on success
curl -s -X DELETE "http://<VST_ENDPOINT>/vst/api/v1/sensor/<sensorId>" | jq .

This removes the sensor from all VIOS APIs but does not delete recordings from disk.

RTSP full cleanup: Calling only DELETE /sensor/<sensorId> leaves orphaned recordings on disk. See the delete guidance in Section 8 for the complete two-step RTSP removal flow.

---

8. File Upload / Delete

There are two PUT upload APIs. Use the new API (v2) for most cases.

PUT Upload — New API (v2): PUT /storage/file/{filename}

Filename in path, timestamp and sensorId as query params.

# filename: must not contain whitespace
# timestamp: ISO 8601 UTC, e.g. 2025-01-01T00:00:00.000Z — default when user has not specified: 2025-01-01T00:00:00.000Z
# sensorId: optional — if omitted, server generates a UUID; if provided and already exists, file is added as a sub-stream of that sensor
curl -s -X PUT "http://<VST_ENDPOINT>/vst/api/v1/storage/file/<filename>?timestamp=<timestamp>&sensorId=<sensorId>" \
  -H "Content-Type: application/octet-stream" \
  -H "Content-Length: <file_size_in_bytes>" \
  --upload-file /path/to/video.mp4 | jq .

Key behavior:

• Returns 409 Conflict if a file with the same name already exists — does NOT auto-rename
• sensorId query param: if provided, used as the sensorId (allows grouping under an existing sensor as a sub-stream); if omitted, a new random UUID is generated
• Content-Length header is required

---

PUT Upload — Legacy API (v1): PUT /storage/file/{filename}/{timestamp}

Both filename and timestamp in the path. No query params.

# filename: must not contain whitespace
# timestamp: ISO 8601 UTC, e.g. 2025-01-01T00:00:00.000Z — default when user has not specified: 2025-01-01T00:00:00.000Z
curl -s -X PUT "http://<VST_ENDPOINT>/vst/api/v1/storage/file/<filename>/<timestamp>" \
  -H "Content-Type: application/octet-stream" \
  -H "Content-Length: <file_size_in_bytes>" \
  --upload-file /path/to/video.mp4 | jq .

Key behavior:

• If a file with the same name already exists, auto-generates a unique filename (no 409)
• sensorId is always a newly generated random UUID — there is no way to specify or reuse an existing sensorId; the sensorId query param is ignored even if passed

---

Response (both APIs): {id, filename, bytes, sensorId, streamId, filePath, timestamp, created_at}.

• id — unique file identifier
• sensorId / streamId — assigned sensor and stream (auto-generated UUID if not provided)
• filePath — absolute path on disk where the file is stored
• created_at — epoch ms when file was uploaded
• 413 if payload too large; 422 if codec unsupported; 507 if disk full

Delete an uploaded file (removes physical file from disk AND removes sensor from all APIs):

# streamId: use the streamId returned in the upload response (or from sensor/{sensorId}/streams)
# startTime / endTime: use the timeline range for this streamId (fetch from /storage/<streamId>/timelines)
# Returns {spaceSaved: <MB>}
curl -s -X DELETE "http://<VST_ENDPOINT>/vst/api/v1/storage/file/<streamId>?startTime=<startTime>&endTime=<endTime>" | jq .

Identify sensor type before deleting: call GET /sensor/<sensorId>/streams and check the url field.

• If url starts with rtsp:// → RTSP/IP sensor
• If url is a file path (e.g. /home/vst/.../video.mp4) → uploaded file sensor

Which delete to use:

• Uploaded file sensor — use ONLY DELETE /storage/file/<streamId>?startTime=...&endTime=.... This deletes the physical file and removes the sensor from all APIs. Do NOT use DELETE /sensor/<sensorId> alone — it removes the sensor from APIs but leaves the physical file on disk.
• RTSP sensor — use BOTH in order: first DELETE /sensor/<sensorId> (stops recording, removes from APIs), then DELETE /storage/file/<streamId>?startTime=...&endTime=... (deletes recordings from disk). Using only the storage delete on an RTSP sensor erases existing recordings but the sensor stays active and keeps recording.

File sensor timeline times: Uploaded file sensors report timelines relative to the timestamp provided at upload time, not the upload wall-clock time. If the default was used, timelines start at 2025-01-01T00:00:00.000Z. Always fetch the timeline first before building the delete command — never assume times based on upload time.

---

Workflow: sensor name/IP -> clip or snapshot

When the user has a sensor name or IP but needs a clip or snapshot:

0. Verify VST is reachable (see Setup — Availability Check):

   curl -sf --connect-timeout 5 "http://<VST_ENDPOINT>/vst/api/v1/sensor/version"
   

1. List sensors to find sensorId:

   curl -s "http://<VST_ENDPOINT>/vst/api/v1/sensor/list" | jq .
   

2. Get streams for that sensor to find streamId (prefer isMain: true):

   curl -s "http://<VST_ENDPOINT>/vst/api/v1/sensor/<sensorId>/streams" | jq .
   

3. Check timelines to confirm a recording exists in the requested range:

   curl -s "http://<VST_ENDPOINT>/vst/api/v1/storage/<streamId>/timelines" | jq .
   

4. Download clip or snapshot using the streamId.

---

Responses

Success with data: JSON object or array.

Success with no data: null — a null response means the API call succeeded but there is no data to return (e.g. no schedule configured, scan returned no results). It is not an error.

Success with boolean: Some endpoints return true on success (e.g. DELETE /sensor/{sensorId}).

Error: JSON object with error_code and error_message:

{
  "error_code": "VMSInternalError",
  "error_message": "VMS internal processing error"
}

Common codes: VMSInternalError, VMSNotFound, VMSInvalidParameter.

---

Tips

• jq: All JSON responses are piped through jq . for readability. Binary responses (clip download, snapshot) are not — they use -o <file> instead.
• Time format: Always ISO 8601 UTC, e.g. 2026-04-10T10:30:00Z or 2026-04-10T10:30:00.000Z.
• streamId header: Live/replay/recorder endpoints require streamId as BOTH a path parameter AND a request header — include both.
• Large clips: Use the /url variant to get a temporary download link rather than streaming bytes through curl.
• Sensor vs stream ID: sensorId identifies a camera; streamId identifies a specific video stream from that camera (a sensor can have a main stream and sub-streams).
• Identifying sensor type (RTSP vs uploaded file): Call GET /sensor/<sensorId>/streams and inspect the url field of each stream. If url starts with rtsp:// it is a live RTSP/IP camera stream. If url is a file path (e.g. "/home/vst/vst_release/streamer_videos/TruckAccident.mp4") it is an uploaded file sensor. This determines which delete flow to use — see Section 8.
• Endpoint resolution: The VST endpoint is provided by the VSS deployment context. Do not attempt manual IP/port discovery. If unavailable, ask the user. All curl examples use <VST_ENDPOINT> as a placeholder — substitute the resolved endpoint before executing.