Fri Apr 28, 2017 4:13 pm
Quicktime, mp4, m4v, mkv will support whichever resolution ratio is chosen. Most players (i.e. Smart TV's and of course computers) will play them back and pillarbox or letterbox as needed.
Having said that, nowadays most broadcasters and other industry distributors specifically request a 16X9 file even if it does include pillarbox or letterbox blanking as part of the video.
>>Kays Alatrakchi
Filmmaker based in Los Angeles, CA
http://moviesbykays.com
Resolve 18.1.4, Mac OS X 12.6.3 (Monterey), iMac Pro 64Gb RAM, Decklink Mini 4K, LG C9
Mac Book Air M1, Mac OS X 12.6 (Monterey), 16Gb RAM