How to add or replace audio in a video with Medux MCP

Codex prompt pattern

In this workspace, use medux_add_audio_to_video through Medux MCP to add or replace audio in a video.
First inspect and identify the source video, audio file, and timing requirements.
Show me the exact tool arguments before execution.
After the task completes, return the updated video and verify that the new audio is present at the intended time and the full video plays correctly.

Approval gate

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.

Result verification

Let Codex monitor an asynchronous task until it reaches a terminal state, then save or report the updated video. The final check is explicit: confirm that the new audio is present at the intended time and the full video plays correctly.

Claude prompt pattern

Using the assets and requirements in this conversation, help me add an audio track to a video with Medux MCP.
Restate which input fulfills each role: the source video, audio track, and timing requirements.
Propose the medux_add_audio_to_video call and summarize its arguments before asking for approval.
When it finishes, return the finished MP4 with a checklist confirming that the new audio starts at the intended time and the video duration is correct.

Context checkpoint

Have Claude summarize the intended transformation, identify every source asset by role, and list the important constraints. Review that summary together with the proposed tool arguments; correct the conversation first if a file, order, time range, or setting is ambiguous.

Result verification

Keep the Medux task ID in the conversation while Claude checks progress. When processing ends, ask for the finished MP4 plus a concise validation checklist confirming that the new audio starts at the intended time and the video duration is correct.