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MP 1,1-5,1 4k playback video laggy on Catalina and 3.1 Mac Pro

3LegsLuigi

macrumors newbie
Original poster
Aug 8, 2020
5
0
Dear All,



I have a question concerning 4K video playback.



I've upgraded my 2008 Mac Pro 3.1. to following setup and think, that 4K video should play smoothly, but no, it is laggy and stuttering.



Specs:

OS: Catalina 10.15.12

Device: Mac Pro Early 2008

Processor: 2 x 2,8 GHz Quad Core Intel Xeon

RAM: 28 GT

Startup Disk: SSD

GPU: AMD Radeon R9 280x, 3 GT

Näyttökuva 2020-8-8 kello 16.53.13.png






Could anyone tell me, if it is possible to get 4K to run smoothly? On Youtube etc. I am able to Stream in 4K.



I have an external acer 4K-monitor that currently just runs at 30hz. Anybody having an Idea, how to get it run on 60hz (the Monitor is Supporting 60hz).



Best

Mika
 

h9826790

macrumors G5
Apr 3, 2014
14,695
7,145
Hong Kong
Dear All,



I have a question concerning 4K video playback.



I've upgraded my 2008 Mac Pro 3.1. to following setup and think, that 4K video should play smoothly, but no, it is laggy and stuttering.



Specs:

OS: Catalina 10.15.12

Device: Mac Pro Early 2008

Processor: 2 x 2,8 GHz Quad Core Intel Xeon

RAM: 28 GT

Startup Disk: SSD

GPU: AMD Radeon R9 280x, 3 GT

View attachment 942090





Could anyone tell me, if it is possible to get 4K to run smoothly? On Youtube etc. I am able to Stream in 4K.



I have an external acer 4K-monitor that currently just runs at 30hz. Anybody having an Idea, how to get it run on 60hz (the Monitor is Supporting 60hz).



Best

Mika
If your CPU isn't fast enough, then there is not much you can do. AFAIK, Youtube use VP9 for 4K video, only can be decoded by CPU in macOS on your 3,1, nothing can help.

Anyway, please make sure you connect the monitor via Display Port, but not HDMI. Also, make sure the monitor set to DP 1.2, but not 1.1.
 
Comment

3LegsLuigi

macrumors newbie
Original poster
Aug 8, 2020
5
0
If your CPU isn't fast enough, then there is not much you can do. AFAIK, Youtube use VP9 for 4K video, only can be decoded by CPU in macOS on your 3,1, nothing can help.

Anyway, please make sure you connect the monitor via Display Port, but not HDMI. Also, make sure the monitor set to DP 1.2, but not 1.1.

Thanks for the fast reply - so it seems, that there is no way getting around buying a new Mac #WaitingForANewImac
 
Comment

Dayo

macrumors 6502a
Dec 21, 2018
628
253
Hyvaa,
I'm on a 3,1 as well.
Can you point me to an example of 4k video on Youtube that you have playback issues with?
 
Comment

3LegsLuigi

macrumors newbie
Original poster
Aug 8, 2020
5
0
Hyvaa,
I'm on a 3,1 as well.
Can you point me to an example of 4k video on Youtube that you have playback issues with?
Hey - i think you guys misunderstood me. 4k is running well on Youtube, but not on my SSD. Seems, that my SSD might be too slow.

Best
 
Comment

opeter

macrumors 68000
Aug 5, 2007
1,766
647
Slovenia, EU
I don't think that has anything to do with your SSD. The video needs to be decoded by GPU and/or CPU (or combination of both).

Maybe you can upgrade your graphics card to something newer, that is more modern? Like at least a Radeon RX 560 or better...

Here is an interesting video about this:
 
Comment

3LegsLuigi

macrumors newbie
Original poster
Aug 8, 2020
5
0
Just enabled TRIM and the video began directly become smoother, but still minor stuttering.
Here my Black Magic Disk speed Report.

The GPU should be fast enough for 4k. Bough

Näyttökuva 2020-8-10 kello 17.13.58.png
 
Comment

h9826790

macrumors G5
Apr 3, 2014
14,695
7,145
Hong Kong
Hey - i think you guys misunderstood me. 4k is running well on Youtube, but not on my SSD. Seems, that my SSD might be too slow.

Best
Then you have to show us the video info. Otherwise, no way to tell what's wrong.

e.g. You can use the free version of MediaInfo


Screenshot 2020-08-10 at 11.36.55 PM.png
 
Comment

opeter

macrumors 68000
Aug 5, 2007
1,766
647
Slovenia, EU
The 4k video playback (H264) does work on a mechanical hard drive too, because I tested it not long ago on a 2014 Mac mini...

The problem is your CPU/GPU, which cannot hardware decode HEVC/H265 files. That is while it is laggy.
 
Comment

EugW

macrumors G3
Jun 18, 2017
9,153
6,542
The 4k video playback (H264) does work on a mechanical hard drive too, because I tested it not long ago on a 2014 Mac mini...

The problem is your CPU/GPU, which cannot hardware decode HEVC/H265 files. That is while it is laggy.
The video he listed is AVC.

AVC is h.264, not h.265 HEVC.
 
Comment

opeter

macrumors 68000
Aug 5, 2007
1,766
647
Slovenia, EU
I don't see the his video, so I don't know. If I click on the link he attached, I only get this error message:

 
Comment

EugW

macrumors G3
Jun 18, 2017
9,153
6,542
I don't see the his video, so I don't know. If I click on the link he attached, I only get this error message:

He posted a screen grab of the specs too, and in the specs it is listed as AVC.
 
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Dayo

macrumors 6502a
Dec 21, 2018
628
253
Hey - i think you guys misunderstood me. 4k is running well on Youtube, but not on my SSD.
Terve,
That is no reason to buy anything new. You just need to enable video acceleration. Will need OpenCore.
See here for easy setup. The default OpenCore config in that post already has video acceleration.
 
Comment

OS6-OSX

macrumors 6502a
Jun 13, 2004
909
682
California
Really not enough information given by the OP.

Playback is soooooo vague!

1. Was playback done by hitting the space bar?
2. Played in an app?

The 4K file I tested for "playback" was 4096 x 2160 Panasonic GH4.
Sitting on what now is a 4 spinner internal RAID 0
DiskSpeedTest 4HD.png

A. Hitting space bar-Plays Smoothly
B. MPEG Streamclip 1.9.2-Plays Jittery
C. Quicktime Player 7-Plays Jittery
D. Quicktime Player 10-Plays Jittery
E. VLC 3.0.7.1-Plays Smoothly
F. INA 1.0.1-Plays Smoothly
G. Avid 8.10 Timeline-Plays Smoothly
H. DaVinci 15.3.1 (CUDA CORES)-Plays Smoothly

In addition to the P GH4, I have Alexa, R3D, Sony etc. So yes, it depends on how the 4K is "played back"! :cool:
 
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