Hi Martin,

I'm currently facing an issue with vMix 14.0.0.97 x64.

When I play a h264 video in vMix, I issue some lags, which increases when I add an uncompressed overlay with alpha channel. When I hit local recording, lag increases even more. Note : when I don't stream and record, but just read a video in vMix, it already lags more than VLC.

I do not issue any lag with the same configuration with my decklinks mini recorders. Only with playback videos.
I'm reading the video file from a SATA Hardrive and writing the output on an SSD Drive.

I tried ffdshow Video Decoder, Lav video decoder, and the installed Microsoft DTV-DVD and none of them seem to resolve the problem.
I'm using EVR video render, 0 hardware acceleration.

When i'm streaming 1080p25 3mbps, and recording h264 1080p25 12mbps, my CPU usage vary between 30 and 60%.

Here's what I issue :
http://www.twitch.tv/francoiscalvier/b/585577977

Here is my configuration :

Windows 7 64bits
Intel Core i7-4790K 4.00Ghz
NVidia GeForce GTX 760
32Go RAM
SSD 256Go Drive with vMix installed
1To Drive from which I read the video files

I still am on vMix Trial version, does it affect something in any way ?
Do you have any idea how to solve this problem ?

Thanks

VMR Video render was set by default and it was worse. Switching to EVR Video Render reduced about 70% of the lagging.

Here is the original file (fileObject didn't work) :
https://www.wetransfer.c...5e920141105185347/e77707

Thanks,

François

I just noticed :

I tried to disactivate the fullscreen button (which send Multiview to my second monitor and Output to my third monitor), and render time dropped down to 17-24ms instead of 70-90ms when it's on.

Hi Martin,

1. I tested it with 1080p25, 1080i29,97, 1080p50, 1080i50 : video render always increases to 70-90ms when my 3 monitors are on. (When I only active 2 monitors (my main with vMix + 1 output) or only 1, problem seem to be fixed)
2. All on 760 : 2 DVI Output, 1 HDMI
3. Always unticked

Thanks,
François

Yes, all 3 of them are set to 60Hz.

Thanks