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Lab Case 04

VP9 WebM Import Test

A synthetic VP9-in-WebM file that tests a less universal editing path.

✓ Synthetic fixture✓ Browser-local test✓ Reproducible
Expected top-level behaviorTest Required

What this case is designed to prove

Verify that ClipCompat separates a readable media file from an editor compatibility guarantee when the codec/container combination is outside the MVP’s strongest documented rules.

Sample filevp9.webmabout 68 KB · synthetic test media
Download sample

Generated locally with FFmpeg/libvpx-vp9 and Opus audio from synthetic sources. It contains no user footage.

Sample input

Known media facts

These are the characteristics the fixture was generated to expose. MediaInfo may format some labels slightly differently across versions.

ContainerWebM
Video codecVP9
ProfileProfile 0
Resolution320 × 180
Frame rate30 fps
Frame-rate modeCFR
Bit depth8-bit
Chroma4:2:0
AudioOpus / 48 kHz

Expected behavior

What ClipCompat should report

  • Premiere should remain Test Required in the MVP because VP9/WebM is intentionally not promoted to a universal support verdict.
  • Resolve should remain Test Required for the WebM container even though the current rules can document VP9 in more common MOV/MP4/MKV workflows.
  • The user should see the actual codec and container so troubleshooting starts from facts rather than the extension alone.

Development result

What we verified

The fixture confirms that the media parser can read a VP9/WebM combination while leaving the editor rule engine free to make a cautious target-specific verdict.

Safe handling

Test the original in the installed editor first. If it fails, make an edit copy rather than replacing the source.

Run the test

Open a related checker.

The same sample can intentionally produce different guidance depending on the selected editor target.

ToolPremiere Pro CheckerOpen checker →ToolDaVinci Resolve CheckerOpen checker →ToolVideo Compatibility CheckerOpen checker →
Related troubleshooting guides
AV1 and VP9 in Premiere Pro →

More evidence

Compare all five Lab Cases.

Use the case index to move from a common H.264 baseline to VFR, HEVC 10-bit 4:2:2, VP9 and AV1 test media.

View all Lab Cases