Playback freezes Edius 9

[EQR76]

Do you know why the video plays like in stop motion? Before always any video I played was in real-time, now I have to process it and if I do a cut or trim, I have to reprocess it again because it doesn't play in real-time.

[BernH]

We would need more information to comment.

What kind of files? Container? Codec? Are they different than files that used to work?
What are your system specs? Windows version? Do you have a virus scanner running? Are your media folders excluded from the virus scanner?
What version of Edius?
Where are your files stored? Internal drive? External drive? network? If internal, make sure they are not on the same drive as your software (don't put video on the C: drive)

[antonsvideo]

also, if the audio mixer is open, make sure all tracks are in the off state

also, make sure optical flow is not set as system default

[BernH]

also, if the audio mixer is open, make sure all tracks are in the off state

also, make sure optical flow is not set as system default

Yes, if you have optical flow set as the default frame interpolation and your video is a different framerate than your project, it will severely slow down playback. The mixer thing Anton mentioned will set your buffers to 5 and will quickly deplete them if you have any effects on that your system can't handle in real time.