It sounds crazy to me even typing this, but Vegas can no longer reliably play 420 8bit AVC intraframe video with an Nvidia GPU and wipes like you describe are often all-I intraframe because they are video editor friendly. The result can be playback of black, or flickering black frames. The timeline can display correctly or alternatively only shows a single frame at the beginning of the clip.

Need to provide more information about the file to see if it's related to ALL-I AVC problem.

mark-y, what is inside of the ".mov " wrapper does not matter

Vegas 20 is working with them without problem, Vegas 21 with latest update " sees " same files as Media Offline

Re linking them does not work

Anyway, thanks for responding really appreciated

@Jose M. Estrada said: "... what is inside of the ".mov " wrapper does not matter ... Vegas 20 is working with them without problem"

The Shadetree Diagnostician said: "It matters to the developers who have to fix Vegas Pro 21."

john_dennis, it is Pro-Res 4444

initial release worked fine with those files, latest release does not

As I stated above, Vegas 20 works fine with same files

21 latest release broke all that

thanks

@Jose M. Estrada Hi, what do you hope will come of this thread? You seem reluctant to share much, all we know is you've got a file 'mov files' & you say it's a 'Pro-Res 4444' that doesn't work in VP21 but it does in VP20.

You have to share the information @mark-y asked for in the links provided otherwise no one can help you.

Downloaded Vegas 21 v.108 It now works fine with those files

versions 187 and latest version can not "see" ProRes 4444 in a .mov wrapper

Vegas 21 latest version is broken, what good is in this state?

Gid, as stated before, ProRes 4444 in a .mov wrapper

Vegas 21 v.108 works fine with those files

Vegas 21 v.187 and v.208 "sees" same files as Media Offline

Update 187/208 broke compatibility with such media

Maybe Devs can take a look at it

Thanks for your help

@Jose M. Estrada You've just repeated the very little info you've already given in earlier comments, Devs can't take a look at it because there's nothing to work with. 🤷‍♂️

Here's a couple of ProRes444 in a .mov wrapper working fine in VP21

Gid, thanks for the help, and my files work in 21 v.108 not in 187/208

My files show same attributes as your screenshots

Thanks

Can you share a sample file to confirm there is a general issue with ProRes 444?