Blackmagic Forum

Hi all,

I'm a long-time professional user,

PC SPEC:
Ryzen 5950X
RTX4090
64GB RAM

One very-long-time resource issue that still bugs me is the "using 100% CPU to generate thumbnails and locking up or lagging the PC".

This issue occurs with Thumbnail and Filmstrip timeline views. Let's say you have 100 clips or what-have-you, quickly zoom out then zoom in again to a different part of the timeline, the fans spin up, all CPU cores max to 100% and as a result the mouse pointer lags half a second behind you and the whole machine is unresponsive. It seems worse with some codecs than others.

My suggestion is simple: put a resource cap on thumbnail generation, unless there has been no user input for a couple of seconds. Whatver that is, say 80% CPU max, just leave something so the PC doesn't lock up.

The computer needs SOME CPU left over in normal use to actually function properly.

As you can my spec is high, but because it's literally 100% CPU power used for this task while you're trying to work it presents a nagging problem.

The current solution is to eliminate thumbnails by using "simple view", which is a shame, as thumbnails are nice to have.

There is a separate forum for Feature Requests.

viewforum.php?f=33

Best practice is to search first, to see if someone already asked. If not, post one idea per thread with a very brief description of the idea in the thread's title.

WORKAROUND

Since this post I thought of a workarounds in Windows:

• Task Manager
• Processes
• Drop down Resolve
• Right click Resolve and choose "got to details"
• Right click the Resolve.exe in details and click "set affinity"
• Here you can remove processor cores. I removed four of 32 threads, leaving four available at all times that Resolve cannot access.

This removes the lag entirely, as windows can use the spare cores.