Generate FFmpeg commands with recommended settings for any codec.
Leave blank if using CRF.
Common: 24, 30, 60
Lower = better quality (18-28 typical)
Slower = better compression
Recommended: 128k-320k
Common: 44100, 48000
1 = mono, 2 = stereo
Format: HH:MM:SS or seconds
Format: HH:MM:SS or seconds