Conference recording for a corporate LMS (Learning Management System). H.264 for maximum device compatibility, 720p to keep file sizes manageable, MP3 audio because the legacy LMS only supports MP3 in MP4 containers.
| Video Codec | H.264 |
| CRF | 23 |
| Resolution | 720p |
| Audio | MP3 |
| Container | MP4 |
ffmpeg -i input.mov -c:v libx264 -crf 23 -vf scale=-2:720 -c:a libmp3lame -b:a 192k output.mp4MP3 in MP4 is technically valid per ISO 14496-3 but rarely used. Some ancient enterprise LMS platforms from the 2010s hardcoded MP3 support and never updated. It works, but it makes video engineers twitch.
A new FFmpeg encoding puzzle every day. Six tries, in the browser or from your terminal.