Video Deliver Diagnostic — Vimmi Communications

Delivery URL

WAITING FOR A LINK

THE STREAM LINK The .m3u8 or .mpd your player loads. Copy it from your player configuration, from your packager, or from your browser's network panel while the video is playing.

DRM-PROTECTED STREAMS Playback needs your own license server, so the picture may stay black here — but we still measure delivery: CDN, ABR ladder, segment timing and throughput.

For example https://stream.example.com/live/master.m3u8 https://stream.example.com/vod/12345/manifest.mpd

I am authorised to test this delivery and I accept the Terms of Use & Privacy / Cookie Notice.

Paste a delivery link and accept the terms to start.

⚙ Internal · AIS channel token, diagnostic sync

Play an AIS channel (mints a playback token server-side)

Diagnostic sync endpoint

API key

Sync is OFF unless an endpoint URL is set. The full raw capture always stays local (JSON download + IndexedDB).

One viewer, measured in this browser. No load is generated against your delivery.

LIVE · measuring

Your delivery

Serving via—

01 / STRUCTURE

The full pre-flight measurement every parameter, with its source

02 / PLAYBACK

Your stream, playing here

One real session in this browser. It starts on its own; the simulation waits for its button.

Stream & codec details

VERDICT

03 / THE RUN

A known sequence of impairments at known times

04 / THE RESPONSE

What the delivery did, on the same clock

Throughput, buffer health and per-chunk bitrate — drawn where they were taken, not resampled.

Throughput —

source: —

Buffer health —

source: —

Bitrate per chunk —

source: —

05 / THE REPORT

CMCD — what this player tells the CDN

CTA-5004 · v1 · query mode ?CMCD= · hls.js 1.6.16

waiting…

Last payload on the wire

waiting for the first request…

Live CDN timeline

Which CDN served each segment

Serving CDN resolving…

DNS & host behaviour

Current host resolving…

Host per segment — a colour change is a new hostname; the marks below are host / CDN changes

host	CDN the viewer got	attributed via	CDN our server would get	segments	transport	DNS lookups	reused	median DNS	timings

Recent segments (network waterfall)

Live event log

Advanced diagnostics

Manual impairment operator escape hatch · exact figures, applied to the network

NETWORK IMPAIRMENT Exact figures, applied to the network and felt through the buffer. Nothing here flushes the buffer or freezes the picture. Viewer

Throughput cap

kbps

0 = uncapped. Applied as one shared link, so parallel fragments share it.

Added latency

Delay before each fragment request starts.

Packet loss

Fragments dropped; hls.js retries, so this shows as jitter.

Presets fill the fields:

No impairment — delivery is untouched.

Per-segment network DevTools-grade waterfall · newest first

Throughput (Mbps)—

Buffer health (s)—

#	clock	rendition	CDN	POP	size	TTFB	dl	Mbps	status	cache	proto

Stream & codec details VLC-style media information

#	bitrate	avg	resolution	fps	video	range	audio	container	CDN

ABR ladder & switch history

Ladder (active highlighted)

Recent switches

Manifest inspector raw playlists + parsed tags

Master playlist

—

Current media playlist

—

Anything we should measure that we did not?

Video Deliver Diagnostic v— engine —