Queue sources
Add one URL or a stream-list file. Select one or multiple rows with standard range/multi-select behavior.
Startup and transport evidence
Stream Analysis
Measure startup time, decoded-frame cadence, and source handling for supported files and live streams. Content-quality scoring is a separate workflow.
01
Timing model
Time to first frame (TTFF) measures startup. Component timings explain where that time was spent.
Details: Timing model
RequestOpenProtocol/backend initialization
ResponseFirst byteAvailable for instrumented finite HTTP
MediaMetadataContainer and stream information
DecodeFirst frameFirst usable decoded video frame
Time to first frame (TTFF) is measured to the first usable decoded frame. Component timing is reported only when the selected protocol/backend exposes it; unmeasured time remains explicit rather than being assigned to another phase.
02
Recorded fields
Results retain startup timing, source properties, playback cadence, jitter, frame gaps, status, and notes.
Details: Recorded fields
| Field group | Measurements | Interpretation |
|---|---|---|
| Startup | Open, download, response, first byte, metadata, decode, other, total TTFF | Component availability depends on source type and backend instrumentation. |
| Video | Codec, resolution, duration, measured FPS | Values describe the decoded source observed by the probe. |
| Cadence | Decoded-frame arrival jitter and maximum inter-frame gap | Population standard deviation and maximum interval of decoded-frame arrivals. Buffering, decoder behavior, and local CPU scheduling can affect these measurements; they are not packet-level network-jitter measurements. |
| Operational | Cache state, status, notes, source URL | Retains failures and source handling needed to interpret timing. |
03
Source handling
Finite HTTP media and live streams use different handling. Protocol availability depends on the qualified package and source.
Details: Source handling
Finite HTTP media
Progressive HTTP/HTTPS media is opened directly where possible. Non-fast-start MP4/MOV or unreliable range behavior can use a verified temporary download fallback with a 4 GiB limit.
Cache policy
The default preserve_url policy requests the supplied URL without adding query parameters, preserving signed authentication. Optional explicit_bypass adds a cache-bypass query item and no-cache headers; use it only with compatible unsigned sources. It cannot prove every intermediary cache was bypassed.
Live protocols
RTSP, RTSPS, RTMP, RTMPS, SRT, UDP, and TCP sources are decoded incrementally and are not converted into a required full-download workflow.
Protocol availability
Supported protocols and codecs depend on the media runtime included with each platform package.
Security
Saved sessions can contain source URLs, query strings, or tokens in local plaintext settings. Credentials should be removed before sharing sessions or logs.
04
Studio operation
Queue sources, select rows, measure sequentially, and inspect timing and failures before exporting.
Details: Studio operation
Measure
Selected streams run sequentially with Connected, Buffering, Sampling, Failed, and Completed states.
Inspect
The preview shows the current or latest decoded frame while the result table retains timing, source, status, and notes.
Export
Selection-aware CSV and JSON preserve both successful measurements and actionable failure evidence.