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guztavo  
#1 Posted : Tuesday, September 6, 2016 10:26:26 PM(UTC)
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Hi!
I'm trying to discover the problem. When stream over "WMV Streaming" (in the recording menu), i get a lot of frames lost (about 10 frames, when i setup 25 per second). I cant find the problem. When recording in MP4 there is no problem.
I work with:
-Asus B85M PRO 4
-8GB RAM
-Intel Core i7
-BM Mini Recorder x1

Do you know how can i find the problem?
Thanks!
Regards!!
IceStream  
#2 Posted : Tuesday, September 6, 2016 10:51:17 PM(UTC)
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@ guztavo

Do you have a specific need for "WMV Streaming" from recording settings?
AFAIK, this does not record internally but streams to a designated port on your computer.


Ice
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guztavo on 9/13/2016(UTC)
guztavo  
#3 Posted : Tuesday, September 6, 2016 11:00:26 PM(UTC)
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Thanks ICE!
I stream at 25fps. vMix general setup it's at 720p50.
The Sony camera work with the Blacmagic at 720p50.
There is no difference between the bitrate. Drop frames at 10 / 15 / 20mbps.
Thanks!!!
guztavo  
#4 Posted : Thursday, September 8, 2016 10:11:58 AM(UTC)
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guztavo wrote:
Thanks ICE!
I stream at 25fps. vMix general setup it's at 720p50.
The Sony camera work with the Blacmagic at 720p50.
There is no difference between the bitrate. Drop frames at 10 / 15 / 20mbps.
Thanks!!!

New test has given this results:

Recording time: 00:17:00
Dropped frames: 2168
Render time: between 9-18ms
Total CPU usage: 50-60%
vMix setup: 17 / 720p50 Win10

I found something interesting. While losing frames, in Windows Task Manager i see a 40% of hard disk usage (about 39% by vMix).
But that happens when playing a specific list. When i start playing other video, losting frames stopped and hard disk usage falls to 0%.

File that causes fails:
Video:
-Bit rate: 2019kbps
-720p25
Audio:
-bit rate: 154kbps
-channels: 2
-sample rate: 48kHz

File that do not fails:
Video:
-Bit rate: 2898kbps
-720p25
Audio:
-bit rate: 144kbps
-channels: 1
-sample rate: 44kHz

The "i" button show dropped frames by hard disk / CPU.
And, when using a camera with different configuration than the project, i get a lot of frames dropped too, by hard disk / CPU.

IMPORTANT: This issue only happens on WMV STREAMING. When recording, i only have issues with the camera, no with the MP4 files playing.

Thanks, regards
stigaard  
#5 Posted : Friday, September 9, 2016 7:10:25 AM(UTC)
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Do you use SSD or regular harddrives for your production? For me it sounds like the computer is exhausted trying to read/write to the disks, but it shouldn't be a problem if you are using SSD drives.

If you use regular harddrives, you really need to swap out those with SSDs for being able to record and play videos at the same time.

Cheers,
Jens Stigaard
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guztavo on 9/13/2016(UTC)
guztavo  
#6 Posted : Tuesday, September 13, 2016 9:55:59 PM(UTC)
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stigaard wrote:
Do you use SSD or regular harddrives for your production? For me it sounds like the computer is exhausted trying to read/write to the disks, but it shouldn't be a problem if you are using SSD drives.

If you use regular harddrives, you really need to swap out those with SSDs for being able to record and play videos at the same time.

Cheers,
Jens Stigaard



Jens, thanks for your answer.
Actually, i'm working with an SSD hard drive, so that's why i dont understand where this issue come.
Any ideas?
Thanks!
Mathijs  
#7 Posted : Wednesday, September 14, 2016 2:45:36 AM(UTC)
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If the CPU in the system does have hyperthreading, 50-60% is 100% in real time.
So you are overloading your system, which results in dropped frames.
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guztavo on 9/14/2016(UTC)
guztavo  
#8 Posted : Wednesday, September 14, 2016 8:28:07 AM(UTC)
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Mathijs wrote:
If the CPU in the system does have hyperthreading, 50-60% is 100% in real time.
So you are overloading your system, which results in dropped frames.


Thanks Mathijs!
Actually the i7-4790 have hyper-threading technology.
I think the problem is that i'm working with onboard Intel HD Graphics 4600 instead of a dedicated video card.
I will try adding a graphics card and tell you results.
Thanks for helping.

Regards
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