Build correct FFmpeg commands for media-processing tasks by composing recipes from the references instead of recalling commands from memory. FFmpeg syntax is highly position-sensitive and easy to get subtly wrong, so prefer adapting a known-good command from these references over inventing one.

Workflow:

Identify the task category (simple edit, audio processing, advanced filtering, asset generation, encoding tune-up).
Open the matching reference file and pick the closest recipe.
Adapt input paths, time ranges, dimensions, codecs, and filter parameters to the user's request.
Before returning the command, walk through references/glossary.md to validate stream selectors, -map, -c copy use, and seeking position.
If the user is running on macOS or Linux without a GPU, do not suggest *_nvenc, *_qsv, or VAAPI encoders.

If doing partial work, load only the relevant reference files.

ffmpeg

Core Instructions