Rank: Newbie
Groups: Registered
Joined: 4/21/2022(UTC) Posts: 7  Location: NC Thanks: 4 times
|
Running Vmix on a an HP Z2 G5 SFF, Xeon W-1250/Quadro P620, 16gb ram, 2TB SSD, doing live video production with 2 sdi inputs via blackmagic input card.
Earlier this year we switched from 720 to 1080 upload stream. Since then I am starting to see a slight jitter, or frame skip, in the video approximately every 15 seconds. I can watch the event online and see the jitter/skip clearly on the event replay.
We use instant replay for both cameras and I am wondering if we are taxing the system since we started uploading stream at 1080. I am considering upgrading the cpu, gpu, or both to resolve the problem.
Any ideas would be greatly appreciated. Thanks in advance.
|
|
|
|
|
|
Rank: Advanced Member
Groups: Registered
Joined: 3/7/2012(UTC) Posts: 2,647  Location: Canada Thanks: 33 times
Was thanked: 508 time(s) in 477 post(s)
|
@ HMS Video
Both if possible, but certainly upgrading the GPU will be beneficial, the Quadro P620 only has 512 CUDA cores which is less than half of what the GTX 1060 has (1280.
Ice
|
 1 user thanked IceStream for this useful post.
|
|
|
|
Rank: Advanced Member
Groups: Registered
Joined: 4/23/2017(UTC) Posts: 1,247 Location: Germany Thanks: 3 times
Was thanked: 172 time(s) in 154 post(s)
|
Have you monitored CPU and GPU utilization. It could give you a hint where the bottleneck is. WIth notebooks it might be a challenge to upgrade the GPU. In most cases it results in a new system. If the BMD solution offers an output as well you might want to look into using vMix as a mixer and do the encoding externally with an appliance.
|
1 user thanked mavik for this useful post.
|
|
|
|
Rank: Newbie
Groups: Registered
Joined: 4/21/2022(UTC) Posts: 7 Location: NC Thanks: 4 times
|
Originally Posted by: HMS Video  Running Vmix on a an HP Z2 G5 SFF, Xeon W-1250/Quadro P620, 16gb ram, 2TB SSD, doing live video production with 2 sdi inputs via blackmagic input card.
Earlier this year we switched from 720 to 1080 upload stream. Since then I am starting to see a slight jitter, or frame skip, in the video approximately every 15 seconds. I can watch the event online and see the jitter/skip clearly on the event replay.
We use instant replay for both cameras and I am wondering if we are taxing the system since we started uploading stream at 1080. I am considering upgrading the cpu, gpu, or both to resolve the problem.
Any ideas would be greatly appreciated. Thanks in advance. I went back and watched the online replay of my last event and then compared it to the instant replay video that I save and archive. The instant replay doesn’t have any of the graphics or overlays, just raw footage. Interesting discovery, the jitter/skip occurs on the finished product online replay but not on the instant replay archive. I’m going to pop the cover off the computer and see what kind of space I am working with as far as upgrading.
|
|
|
|
|
|
Rank: Newbie
Groups: Registered
Joined: 4/21/2022(UTC) Posts: 7 Location: NC Thanks: 4 times
|
Looked around for gpu that would fit the dimensions available and have ordered the RTX A2000 as well as 2 sticks of 16GB RAM. Looking at a cpu, Xeon W-1370, as a possibility if this doesn’t completely fix the issue. However, after researching and watching upgrades similar to mine I think the A2000 will get us back to full stream.
I will post updates after some testing.
|
|
|
|
|
|
Rank: Advanced Member
Groups: Registered
Joined: 4/23/2017(UTC) Posts: 1,247 Location: Germany Thanks: 3 times
Was thanked: 172 time(s) in 154 post(s)
|
For CPU pay attention to the lane count. Older i-CPUs tend to have 16 lanes only. The higher the better, otherwise the PCIe bus will need to share resources. Most GPUs use 16 lanes, plus 4 lanes for NVMe plus other PCIe devices gets the system into a shared situation quickly. A lot of XEONs have 40 lanes but make sure it fits your system. You can compare intel CPUs at ark.intel.com
|
1 user thanked mavik for this useful post.
|
|
|
|
Rank: Newbie
Groups: Registered
Joined: 4/21/2022(UTC) Posts: 7 Location: NC Thanks: 4 times
|
Installed the RTX A2000 and the 2 sticks of 16GB RAM. I ran geekbench to get a baseline before and after. The P620 had a score of 11900 and the A2000 had a score of 74000. I’m amazed the P620 handled Vmix as well as it did.
The geekbench scores for the W-1250 improved slightly on single core but considerably on multi-core, I’m guessing the fruits of additional RAM.
Fingers crossed that everything goes well this season with the video production. We plan to do at least one dry run before the season begins.
Big THANKS to mavik and IceStream for your responses and assistance!
|
|
|
|
|
|
Forum Jump
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.
Important Information:
The vMix Forums uses cookies. By continuing to browse this site, you are agreeing to our use of cookies.
More Details
Close
