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Droped frames in Multicorder
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Denis_72  
#1 Posted : Wednesday, June 4, 2014 10:20:36 AM(UTC)
Denis_72

Rank: Newbie

Groups: Registered
Joined: 6/4/2014(UTC)
Posts: 6
Location: Russia
Hi All,

I have created powerfull workstation for using with vMix, but I have problem with dropped frames in multicorder.

Configuration:

HP z820
2x Xeon E5-2630v2
16GB RAM
SSD for system
3x 7200 SAS HDD's for recording
Geforce GTX 680 4GB
Windows 7 Pro x64 or Windows 8.1 Pro x64

2x DeckLink Quad for 8 inputs (HD 1080i50)
1x DeckLink Duo for 2 outputs

If I add more than 5 inputs (capture devices) to vMix and then try to record it in Multicorder I receive dropped frames.

I saw the descriptions of the systems with 8 inputs.
For example: http://www.streambreeze....oadcast.htm#.U43ZFfl_u9V
Or this (but I think, it's a "fake", because two Matrox VS4 boards are not supported in one system for vMix): http://www.vmix.es/index.php/sistemas

What could I do wrong?

Denis
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admin  
#2 Posted : Wednesday, June 4, 2014 10:28:35 AM(UTC)
admin

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Hi Denis,

You will need to have a look at the log files of each recording to identify the source of the dropped frames.
If it says the dropped frames is caused by CPU/Disk then it is likely the CPU is not fast enough, or the codec selected
does not scale to multiple cores.

If it is due to source frame rate, then there might be a system bus limitation in the system.
(The pci express ports may be shared or placing limits on bandwidth)

You can check for the second limit by adding all 8 inputs without recording and checking the statistics window.
http://www.vmix.com.au/help12/Statistics.html

Regards,

Martin
vMix
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Denis_72  
#3 Posted : Wednesday, June 4, 2014 10:45:39 AM(UTC)
Denis_72

Rank: Newbie

Groups: Registered
Joined: 6/4/2014(UTC)
Posts: 6
Location: Russia
Statistic with 8 inputs (reseted after 2-3 seconds after adding inputs)
https://drive.google.com...TUNtVXM/edit?usp=sharing
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Denis_72  
#4 Posted : Wednesday, June 4, 2014 10:53:24 AM(UTC)
Denis_72

Rank: Newbie

Groups: Registered
Joined: 6/4/2014(UTC)
Posts: 6
Location: Russia
I think, it's CPU... first CPU cores are loaded up to 100%, but secondary CPU is not loaded.

03.06.2014 18:48:16, Version: 12.0.0.129 x64
03.06.2014 18:48:16, Size: 1920x1080
03.06.2014 18:48:16, System: PAL 50i or 25p
03.06.2014 18:48:16, Codec: Microsoft MPEG-2 Encoder
03.06.2014 18:48:16, Format: UYVY 16 1498831189
03.06.2014 18:48:16, AudioDevice: vMix Audio
03.06.2014 18:48:16, AudioFormat: 48000 Hz 16 Bit 2 Channels
03.06.2014 18:48:16, AudioDelay: -100
03.06.2014 18:48:16, RestartInterval: 0
03.06.2014 18:48:16, BitRate: 25
03.06.2014 18:48:18, StartRecording
03.06.2014 18:49:20, StopRecording
03.06.2014 18:49:20, Duration: 00:01:03
03.06.2014 18:49:20, Frames: 1149
03.06.2014 18:49:20, DroppedFrames: 416
03.06.2014 18:49:20, DueToSourceFrameRate: 215
03.06.2014 18:49:20, DueToHardDiskOrCPU: 201
03.06.2014 18:49:20, DroppedSamples: 0
03.06.2014 18:49:20, MissedSamples: 0
03.06.2014 18:49:20, SyncedSamples: 0
03.06.2014 18:49:20, AudioOffset: 20
03.06.2014 18:49:20, AudioDelay: -100
03.06.2014 18:49:20, AudioEngine
03.06.2014 18:49:20, Running: True
03.06.2014 18:49:20, SampleRate: 48000hz 16 Bit
03.06.2014 18:49:20, MixingErrors: 0
03.06.2014 18:49:20, Streams
03.06.2014 18:49:20, Stream0
03.06.2014 18:49:20, Samples: 138298
03.06.2014 18:49:20, Dropped: 1
03.06.2014 18:49:20, Latency: 2
03.06.2014 18:49:20, AudioInputs
03.06.2014 18:49:20, Decklink Video Capture (5)
03.06.2014 18:49:20, Latency: 30/80
03.06.2014 18:49:20, Dropped: 0
03.06.2014 18:49:20, Resampled: 10 ms
03.06.2014 18:49:20, Decklink Video Capture (6)
03.06.2014 18:49:20, Latency: 70/80
03.06.2014 18:49:20, Dropped: 0
03.06.2014 18:49:20, Resampled: 0 ms
03.06.2014 18:49:20, Decklink Video Capture (7)
03.06.2014 18:49:20, Latency: 40/80
03.06.2014 18:49:20, Dropped: 0
03.06.2014 18:49:20, Resampled: 60 ms
03.06.2014 18:49:20, Decklink Video Capture (8)
03.06.2014 18:49:20, Latency: 70/80
03.06.2014 18:49:20, Dropped: 0
03.06.2014 18:49:20, Resampled: 40 ms
03.06.2014 18:49:20, Decklink Video Capture
03.06.2014 18:49:20, Latency: 30/80
03.06.2014 18:49:20, Dropped: 0
03.06.2014 18:49:20, Resampled: 10 ms
03.06.2014 18:49:20, Decklink Video Capture (2)
03.06.2014 18:49:20, Latency: 40/80
03.06.2014 18:49:20, Dropped: 0
03.06.2014 18:49:20, Resampled: 10 ms
03.06.2014 18:49:20, Decklink Video Capture (3)
03.06.2014 18:49:20, Latency: 40/80
03.06.2014 18:49:20, Dropped: 0
03.06.2014 18:49:20, Resampled: 0 ms
03.06.2014 18:49:20, Decklink Video Capture (4)
03.06.2014 18:49:20, Latency: 60/80
03.06.2014 18:49:20, Dropped: 0
03.06.2014 18:49:20, Resampled: 0 ms
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admin  
#5 Posted : Wednesday, June 4, 2014 11:35:07 AM(UTC)
admin

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Mpeg2 might not support multiple separate processors. You might have more success with AVI and Decklink MJPEG
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