Resolume Forum

Hey everyone -

Been running tests on our Resolume machines. From time to time, the content will be playing and then just "jump" or stutter. What I mean is that video playback will jump a skip a frame or two randomly, or it will stutter in it's playback performance. It's pretty random when it happens. Been playing with various settings across the board to try to dial it in.

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Machine specs are:
Resolume is V5.1.3
Windows 10 Pro (New, clean install as of this posting)
Intel 6850, Core i7, 6 Core, 3.4 Ghz
Asus X99 MoBo
64 GB of Ram.
Samsung 850 SSD, eSata
Samsung 950 Pro SSD, M.2
Dual nVidia GTX 1080 (SLI is disabled)
- V-Sync is ON
- Triple Buffering is ON

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My test file is a single DXV3 encoded 1920x1080, 29.97 FPS file.

Output is a single 1920x1080 monitor.

Both monitors are refreshing at 60hz.

Thank you all -

Are you playing your clips in timeline, BPM or SMPTE mode?

Timeline, set to loop.

Btw, All content is playing off of a Samsung 960 Pro M.2 drive.

When Resolume stutters or hickups at random intervals, it usually means the operating system is not allowing it do what it wants to do fast enough.

Prime suspects are disk access, or textures uploading from the CPU to the GPU.

The first one is pretty easy to check using Task Manager. A spike in disk read access would mean some other process is also accessing the disk, causing a choke.

The second one is more difficult to check. Afaik, there are no logging tools for this. Especially because you have a second GPU, there is potentially a lot of texture data being passed back and forth. I would try to eliminate as many variables as possible by making sure you are running a single GPU, and both your content SSD and GPU are connected to the mobo via the fastest connection you have available, preferably PCIe x16 lanes.

For Mac users, it's worth to note that iStat on OSX can cause intermittent freezes when it samples GPU activity, but since this is a PC related question this is not really relevant for Meptik.

Great info to know.

As far as bandwidth, the GPU is in a 16x PCIe, along with the Samsung 960 Pro M.2 being in the Mobo's M.2 slot.

I'll look into any other background processes that I might not be aware of and try to squash them as much as possible. We've stripped the OS down as much as possible, but who knows what else is there.

All outputs are running off of one GPU, the second GPU is mainly for other purposes like mograph rendering.

Thanks for the info and updates. Much appreciated.

Meptik wrote:As far as bandwidth, the GPU is in a 16x PCIe, along with the Samsung 960 Pro M.2 being in the Mobo's M.2 slot.

Not all 16x PCIe slots are created equal so check the lane assignement to make sure that the 16x slot you're using runs at full 16x speed. You should be able to find that information in your Mobo's manual.

Thanks Oaktown. I can confirm that it and the M.2 are running at full bandwidth as we've check all system settings before.

I'm going to research more on how to strip every Windows background task out of the way. Are there any pointers, direction, on doing a completely clean slate install of Windows? I've been searching for answers on this for a bit. Thanks!