Visual VMAF Analysis for Real Encoding Work

Average VMAF is useful, but it doesn't tell you where an encode fails. Video Commander adds a timeline view so you can inspect per-frame or per-segment quality changes across the file and catch trouble spots faster.

• Compare source and encoded files without building custom scripts
• Score with Netflix's VMAF v1 models, including 4K and 4K TV, or v0.6.1
• Tone map HDR sources to SDR before scoring
• Read percentiles, a score histogram, and the lowest-scoring moments, not only the mean
• See quality dips instead of reading raw logs
• Put up to three runs next to a baseline in the Compare tab
• Save the summary as PNG or PDF, or export CSV or JSON
• Use visual analysis during codec tuning and bitrate ladder work
• Speed up debugging for delivery and streaming workflows

A number tells you quality dropped. It does not tell you whether the cause was banding in a gradient, mush in fast motion, or blocking on a hard cut. The Frames tab puts any frame of a run next to its source so you can look at the difference directly.

• Jump straight to the worst-scoring frame in the run
• Drag a wipe across the two frames, or blink between them in place
• Read an amplified difference map that states its own amplification factor
• Zoom and pan stay locked across both images, so they never drift out of alignment
• Every frame carries its own VMAF score and timecode

The difference map is the mode that finds what the eye skims past. It is a per-pixel difference, brightened until it is visible, so bright areas mark where the encode moved furthest from the source. It states its own amplification factor, which is what separates a genuinely clean encode from a map that has simply been scaled down.

VMAF GUI vs Traditional CLI Workflow

Scores come from libvmaf, the same library the command line uses. The timeline view and CSV/JSON export are what the app adds on top.