add SVT-AV1 4.0 as codec to iVSR

[sunzhenx]

Add SVT-AV1 4.0 codec support for iVSR ffmpeg plugin integration.

[soopel]

LGTM

[soopel]

Hi @sunzhenx, the CI checks aren't running on this PR because the branch is based on an outdated master. The workflow runs are created but complete with no jobs, so there's nothing for maintainers to approve, and no checks appear.

Could you please update your branch? Either option works:

1. Update your branch — merge the latest OpenVisualCloud/iVSR:master into zhenx_dev and push. This will re-trigger the workflows against the current base.
2. Alternatively, enable "Allow edits by maintainers" on this PR so we can update the branch for you. (Only you, as the PR author, can toggle this — maintainers cannot.)

Once the branch is updated, the build/CodeQL/Trivy/Dependency-Review checks should run normally. Thanks!

[sunzhenx]

Hi, @soopel I've done both steps to fix the CI issue:
1. Merged the latest OpenVisualCloud/iVSR:master into zhenx_dev and pushed the update to re-trigger the workflows.
2. Enabled "Allow edits by maintainers" on this PR.
Could you please check if the CI checks are now running correctly? Let me know if anything else is needed. Thanks!

[soopel]

Looks good to me

[marcin-le]

The comment applies to all usages of mentioned code in all files

[soopel]

Looks good to me