Set the format, codec, quality, and trim times and this builds the full
ffmpeg command for you – with a plain-English explanation of what each
part does. Copy it straight into your terminal.
H.264/5 use CRF for quality (lower = better, 18–28 typical); VP9/AV1 often use
-crf with -b:v 0 for quality-based encoding. Audio-only
formats (MP3/Opus/WAV) skip video settings automatically.