Merge Audio and Video to new File

Merge Audio and Video to new File is built for one of the most common last-mile post tasks: taking a separate audio master and combining it with a picture file to create a new deliverable. It is simple on purpose, but it includes enough safety checks to be useful in real client and handoff work.

• Select one video file and one audio file and merge them into a new output.
• Detect when durations do not match and expose offset controls.
• Estimate first-frame-of-action offset from black for faster sync work.
• Choose between safe MP4 presets and source-codec passthrough presets.

The recipe validates both inputs first, compares their durations, and then builds the output filename from either the audio or the video source depending on your settings. When the durations suggest the audio needs to start later, the recipe exposes both seconds and frame-based offset controls and can help estimate the offset by detecting black at the start of the picture.

Merge Presets

• Keep audio and video codecs as source
• Keep video codec and re-encode audio to match more safely
• Small MP4
• Large MP4

Export Settings

• Name Base: audio or video filename
• Overwrite
• Custom Folder
• Sub Folder
• Name Tag

This makes the recipe a strong everyday tool for versioning approval exports, replacing scratch audio with final mixes, or generating fresh review files without opening a full edit session.