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Add video metadata and visible watermark removal

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Victor Kuznetsov
2026-07-29 17:28:11 -07:00
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@@ -125,6 +125,60 @@ The command also supports the audio and video containers listed in
[supported signals](supported-signals.md). ffmpeg must be available for the
non-ISOBMFF audio and video path.
## Strip AI metadata from video
The experimental video namespace starts with metadata inspection and removal:
```bash
remove-ai-watermarks video metadata input.mp4 --check
remove-ai-watermarks video metadata input.mp4 --remove -o clean.mp4
```
Supported containers are MP4, MOV, M4V, WebM, and MKV. The operation delegates
to the same verified metadata scanner and stripper as the generic `metadata`
command, so detection and removal stay in parity. Video and audio streams are
not transcoded. For MP4 and MOV, this includes the native TC260 `AIGC` key and
JSON value stored in `moov.udta.meta.keys/ilst`. The inspector seeks past a
large `mdat` to find a tail `moov`; removal blanks the key and value in place so
box sizes and media offsets do not move.
For MKV and WebM, the inspector reads the native TC260
`Segment.Tags.Tag.SimpleTag` entry. Removal uses ffmpeg stream copying to
discard container tags and chapters without transcoding the streams.
When `-o` is omitted, the command writes `<source>_clean` with the same
extension. It never overwrites the source, and it rejects an output with a
different container extension.
Visible video labels and invisible video watermarks are not handled by this
command.
## Remove a visible Sora or Veo video mark
```bash
remove-ai-watermarks video visible input.mp4 -o clean.mp4
remove-ai-watermarks video visible veo.mp4 --mark veo -o veo_clean.mp4
```
The experimental command supports the moving Sora mascot and wordmark plus two
Veo corner variants: the current four-point diamond and the legacy `Veo` text.
Sora searches the whole frame at multiple scales. Veo searches the
bottom-right corner using separate synthetic silhouettes for the two variants.
Both require a spatially recurring candidate across adjacent frames. Matching
provider provenance may relax the visual score, but metadata alone never
creates a detection. Clean API exports therefore remain untouched.
The video stream is transcoded and the original audio stream is copied.
Supported input and output containers are MP4, MOV, M4V, WebM, and MKV; the
output extension must match the input. The default `cv2` backend is fast but can
smear structured backgrounds. Select `--backend migan` or `--backend lama` for
a learned fill, or `--backend auto` to choose the best installed backend.
AI metadata is stripped from the encoded output by default. Use
`--keep-metadata` to retain mapped container metadata. When no temporally stable
mark is found, the command writes no output and exits with the no-visible-mark
status.
## Remove invisible watermarks
Install the diffusion dependencies first: