Video Lag issue on new macbook pro

[Olivier Bémer]

Hi Everyone,

I have video lag issue for a show here is my configuration: 

I'm using Qlab 4

I want to play a 1280 x 720 video (Apple 422 Proxy)

on a 1280 x 720 surface, 

displayed on 2048x1080 Christie projector 

The video is very light only 30mo. 

The computer is a brand new macbook pro 13""

3,1ghz Intel core i5

8go Ram

Intel Iris Plus Graphics 650 1536mo

I have a Hdmi cable plugged from the projector to an HDMI / usb-C adaptor. 

I have no idea why I have video lag issue on this one. The video plays ok on quicktime, in both screens, lcd display and the projector. 

Is it the graphic card of the macbook ? I thought it would be enough. 

Any suggestions  ?

Thanks a lot. 

[Chris Ashworth]

Hi Olivier,

Can you describe in more detail what you mean by lag?

Do you mean:

 - dropped frames or stuttering playback?

 - a delay before the video starts playing?

 - something else?

Best,

Chris

[Olivier Bémer]

I’m not sure I’m able to tell the difference between dropped frames or stuttering playback. 

But it's definitly not a delay problem. 

I had doubts on the HDMI adaptor for new USB-C port, but since the video is playing allright on the projector display with VLC or quicktime I’m not sure. 

Could it be the mac that is not powerfull enough ? i’d be surprised..

It’s working fine on my computer that has NVIDIA GeForce GT 650M 1024 Mo and Intel HD Graphics 4000 1536 Mo.

But on this computer i have dropped frame even on a 150ko mp4 file. 

[Sam Kusnetz]

Hello all

Just to keep the group updated, Olivier and I are discussing this question through support email and I’ll share any conclusions we might have here once we get to them.

Best

Sam

—

Sam Kusnetz | Figure 53

s...@figure53.com

On November 3, 2017 at 10:41:12 AM, Olivier Bémer (bemer...@gmail.com) wrote:

I’m not sure I’m able to tell the difference between dropped frames or stuttering playback tho. 

I had doubts on the HDMI adaptor for new USB-C port, but since the video is playing allright on the projector display with VLC or quicktime I’m not sure. 

Could it be the mac that is not powerfull enough ? i’d be surprised...

Olivier Bémer

obemer.eu   

+336 50 50 72 33  

Le 3 nov. 2017 à 15:21, Olivier Bémer <bemer...@gmail.com> a écrit :

Hi Chris, 

By video lag I mean dropped frame. 

It’s working fine on my computer that has NVIDIA GeForce GT 650M 1024 Mo and Intel HD Graphics 4000 1536 Mo.

But on this computer i have dropped frame even on a 150ko mp4 file. 

Olivier Bémer

obemer.eu   

+336 50 50 72 33  

Le 3 nov. 2017 à 15:16, Chris Ashworth <ch...@figure53.com> a écrit :

Hi Olivier,

Can you describe in more detail what you mean by lag?

Do you mean:

 - dropped frames or stuttering playback?

 - a delay before the video starts playing?

 - something else?

Best,

Chris

On November 3, 2017 at 9:20:02 AM, Olivier Bémer (bemer...@gmail.com) wrote:

Hi Everyone,

I have video lag issue for a show here is my configuration: 

I'm using Qlab 4

I want to play a 1280 x 720 video (Apple 422 Proxy)

on a 1280 x 720 surface, 

displayed on 2048x1080 Christie projector 

The video is very light only 30mo. 

The computer is a brand new macbook pro 13""

3,1ghz Intel core i5

8go Ram

Intel Iris Plus Graphics 650 1536mo

I have a Hdmi cable plugged from the projector to an HDMI / usb-C adaptor. 

I have no idea why I have video lag issue on this one. The video plays ok on quicktime, in both screens, lcd display and the projector. 

Is it the graphic card of the macbook ? I thought it would be enough. 

Any suggestions  ?

Thanks a lot. 

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