Media Offline fix (audio works but no video):

ms-windows-store://pdp/?ProductId=9n4wgh0z6vhq

https://store.rg-adguard.net/

PackageFamilyName

Microsoft.HEVCVideoExtension_8wekyb3d8bbwe

https://forum.blackmagicdesign.com/viewtopic.php?f=33&t=99030

https://forum.blackmagicdesign.com/viewtopic.php?f=36&t=128153

$ ffmpeg -i file1.mpg -ar 44100 file1-enc.mpg $ ffmpeg -i input.avi -acodec mp3 -vcodec copy out.avi

https://www.reddit.com/r/blackmagicdesign/comments/f65813/wont_let_me_save_project_and_i_dont_want_to_lose/