Codec and duration
Video and audio codec, resolution, frame rate, duration and track layout remain visible for playback checks.
MP4 / MOV / local remux
Clean video metadata without uploading
Inspect the container, then rebuild a clean copy locally. Supported audio and video streams are copied instead of re-encoded, so media quality stays unchanged.
CONTEXT / EVIDENCE
Container cleanup without pixel conversion
An MP4 or MOV file is a container: it holds video, audio, timed data, chapters and metadata. ClearTags asks FFmpeg WebAssembly to map the media streams into a new local container while omitting global metadata, stream metadata and chapters.
Stream copy avoids decoding and re-encoding the picture. That preserves the encoded media bytes when the source streams are compatible with the output container. It is still important to inspect the derivative because metadata and C2PA placement vary by format and producer.
What the report can reveal
C2PA · EXIF · XMP · CONTAINERContainer metadata
Encoder, creation time, location, titles, comments and custom tags may be removable without touching frames.
C2PA placement
A cleaned derivative should be inspected again; not every producer stores provenance in the same place.
Clean an MP4 or MOV locally
WORKFLOW / LOCAL COPY- 01
Choose the final export
Use the file intended for delivery, not the editable project or proxy media.
- 02
Review tracks and metadata
Confirm codecs, duration and C2PA status before creating a derivative.
- 03
Run the local remux
The browser loads self-hosted FFmpeg WASM and copies supported streams into a clean container.
- 04
Preview and reinspect
Check playback, duration, audio and the new metadata report before downloading.