Analysis is slow or stalls

What drives match time on your Mac, what to do when Analyze hangs, and how to file a useful bug report.

Honest first: MOVON Match is in private beta and the inference path is still being tuned. The target is a full multicam timeline matched in about a minute on an M-series Mac. That is a target, not a measured benchmark. Real numbers go on this page once they are measured.

In the meantime, this is what affects match time today and what to do if Analyze hangs.

What drives match time

Three factors, in roughly descending order:

• Number of clips on the timeline. MOVON samples a few frames from every clip, so a 60-clip multicam takes longer than a 6-clip one. Linear, not quadratic.
• Apple Silicon vs Intel. The backbone runs faster on M-series chips by a noticeable margin. The models are optimized for the Apple Neural Engine; an Intel Mac falls back to CPU/Metal and pays for it.
• Other GPU-heavy work. A second NLE open, a render in the background, or a heavy Lumetri Look already on the timeline all share the same GPU. Quitting non-essentials usually shaves time off the next Analyze.

What does not drive match time meaningfully: clip length, codec, resolution. MOVON only looks at sampled frames, not the full clip.

When Analyze hangs

Two cases.

Progress bar moves, then stops

Almost always one of two things:

• A clip on the timeline is offline or unreadable. Premiere shows it as Media Pending; MOVON cannot sample frames from it. Open the project panel, re-link the offline media, then re-run Analyze.
• A clip is in a proxy that was rendered to Rec.709 while the original sits in LOG. Proxies that flatten the color space confuse the match. Toggle off proxies for the Analyze pass (Premiere → preferences → Media → Enable proxies off), then re-enable after.

Progress bar never starts

The backend is not responding.

• Open Activity Monitor and search for "movon".
• If no process is running, restart it. The installer registered it as a LaunchAgent; signing out and back in respawns it.
• If the process is running but the panel cannot reach it, the localhost port may be blocked by a firewall or VPN. Whitelist the MOVON backend, or pause the VPN for the Analyze pass.

The Plugin won't load doc has the longer backend walk-through.

File a useful bug report

If the match is slow in a way that does not match anything above, the homepage Contact form reaches MOVON Labs directly. A useful report has:

• Mac model and chip (M1 Pro, M2 Max, Intel i9, etc.). Apple menu → About This Mac copies the line.
• macOS version.
• Premiere version.
• Clip count on the timeline (rough is fine).
• Time to Analyze in seconds or minutes, with a stopwatch from the click to the plan landing.

That is enough for the team to know whether the run is matching the performance curve or sitting outside it.

What is in the pipeline

Inference-performance tuning is in active development for the private beta. The two pieces moving the needle: smaller backbone variants for short timelines, and parallel sampling so multiple clips embed at once. The dispatch on the homepage carries each cut as it lands.