P — Polish: final QC—check audio sync, subtitle timing, run a visual pass for macro blocking and banding.

I — Integrity: keep the original aspect ratio—don’t stretch or crop aggressively. Pillarbox or letterbox if needed, rather than distorting the frame.

T — Thunder: sound design that punches. AC3 tracks can carry weight—bass for impact, mids for dialogue. Practical tip: if you remux audio, keep a lossless copy (or at least a high‑bitrate AC3/256+ AAC) to avoid flattening the thunder.