Use Codex and Medux through MCP to remove visible subtitles from an uploaded video. This guide covers input preparation, the approval gate, task monitoring, and a concrete output check.
Codex-specific workflow
Use the active workspace as the source of truth. Ask Codex to identify the source video and any subtitle region or processing options, select the Medux subtitle-removal tool, and keep the Medux task ID and returned output with the rest of the project. Naming the input roles and the expected result prevents an agent from guessing which file should be used where.
In this workspace, use the Medux subtitle-removal tool through Medux MCP to remove subtitles from a video.
First inspect and identify the source video and any subtitle region or processing options.
Show me the exact tool arguments before execution.
After the task completes, return the subtitle-free video and verify that the visible subtitles are removed through the required frames and the full video plays correctly.Before approving the call, compare the selected tool, file or asset IDs, ordering, timing, and output settings with the request. If a local filename was mapped to an uploaded Medux file ID, keep that mapping visible so it can be audited later.
Let Codex monitor an asynchronous task until it reaches a terminal state, then save or report the subtitle-free video. The final check is explicit: confirm that the visible subtitles are removed through the required frames and the full video plays correctly.
The video tutorial shows a compact agent workflow: prepare the file, give Codex the task, upload the asset to Medux, start subtitle removal, poll the task, then download and preview the result.
remove_subtitle.mp4.Open the project that already has the Medux MCP server connected. Place the video you want to clean in the workspace so Codex can access it directly.
/Users/chuan/projects/test_mudex/remove_subtitle.mp4
Keep the instruction direct. Tell Codex which file to use, what result you want, and that it should call Medux through MCP instead of doing unnecessary local analysis.
Remove all visible subtitles from the video located at /Users/chuan/projects/test_mudex/remove_subtitle.mp4 and output a clean version without subtitles. Use Medux. Call the Medux MCP directly and do not perform excessive analysis.Codex asks Medux for an upload target, then sends the local MP4 to that signed URL. In the recorded flow, Codex also keeps the upload request precise by using the returned content type.
curl --path-as-is -X PUT -T ./remove_subtitle.mp4 -H "Content-Type: video/mp4" "<medux_signed_upload_url>"
After the upload succeeds, Codex calls the Medux processing workflow. Medux handles the actual subtitle removal in the cloud, while Codex keeps the job organized inside the same chat.
Medux MCP action:
- input: uploaded MP4 asset
- task: remove visible subtitles
- output: cleaned MP4
When Codex needs permission to query the Medux task, approve the MCP call. Codex then checks the task status at intervals until Medux returns the final output URL.
Medux task status:
PROCESSING → PROCESSING → COMPLETED
When the task completes, Codex downloads the cleaned MP4 back into the workspace. Open the result and preview it to confirm that the visible subtitles are gone.
clean output:
/Users/chuan/projects/test_mudex/remove_subtitle_clean.mp4
Before you post the tutorial on your site, docs, blog, or social channels, keep the story focused on the agent workflow: Codex gives instructions, Medux processes the video, and the final clean asset returns to the workspace.
Example result
Play the final video below to review the subtitle-removal result generated by Medux.
Continue with a nearby Medux workflow or compare how the same task works across Claude MCP and Codex MCP.
Quick answer
Codex can use the Medux subtitle-removal tool through Medux MCP to remove visible subtitles from an uploaded video. The workflow identifies the exact inputs, reviews the tool arguments, monitors processing, and verifies the returned result.
Codex can use the Medux subtitle-removal tool through Medux MCP to remove visible subtitles from an uploaded video. The workflow identifies the exact inputs, reviews the tool arguments, monitors processing, and verifies the returned result.
Related topics: Remove Subtitles from Video · Remove Subtitles from Video with Codex MCP · Medux MCP tutorial
Build with the API
Use the API reference to automate this workflow, or follow the matching guide in our official GitHub repository.