Fix ffmpeg dependency issue in gradio docker images

[letonghan]

Description

Fix ffmpeg dependency issue in gradio docker images

Issues

Fixes #2089

Type of change

• Others (enhancement, documentation, validation, etc.)

Dependencies

update download version of ffmpeg

Tests

Describe the tests that you ran to verify your changes.

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues found.

Scanned Files

None

[Copilot]

Pull Request Overview

This PR fixes ffmpeg dependency issues in Gradio Docker images by simplifying the ffmpeg installation approach. Instead of downloading and manually installing a static build from johnvansickle.com, the PR switches to using the standard ffmpeg package from the apt repository.

• Removes complex manual ffmpeg static build installation
• Adds ffmpeg as a standard apt package dependency
• Simplifies the Docker build process by eliminating custom download and extraction steps

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
MultimodalQnA/ui/docker/Dockerfile	Replaces manual ffmpeg static build installation with apt package
CodeGen/ui/docker/Dockerfile.gradio	Replaces manual ffmpeg static build installation with apt package

[eero-t]

Looks fine => approved.

However, one CI test fails to ASR service timeout. Could you rebase this to main so test gets re-run?

[eero-t]

Image size "collect-comments" CI test lists noticeable image size improvement:

MultimodalQnA/ui/docker/Dockerfile resulted in a change in the image size from 1899 -> 1750 MB (diff: -149 MB)

[letonghan]

Looks fine => approved.

However, one CI test fails to ASR service timeout. Could you rebase this to main so test gets re-run?

Thanks @eero-t . All CI tests passed now.