4K video lagged

notooth · 01-20-2018, 09:59 AM

Hi everyone,

I watch 4K video very well on Youtube, but playing 4K movies on my local hard drive is lagged. Can anyone help?
My system is:
Intel(R) Core(TM) i3-3240 CPU @ 3.40GHz
SSD 300GB Sata 3

Emerson · 01-20-2018, 11:40 AM

You forgot to tell us what player you are using and if it can utilize VA-API.

notooth · 01-20-2018, 01:26 PM

I use VLC, MPV, SMPlayer, and Dragon Player.

tofino_surfer · 01-21-2018, 02:13 PM

Quote:

I watch 4K video very well on Youtube

The "4K" and "HD" video on many websites is highly compressed, more than a Blu_Ray would be. Just because it says it is "4K" doesn't mean it has the same bit rate as a true 4K movie. If you downloaded a 4K movie onto your SSD offline it could have a much higher bit rate than anything off of YouTube.

Quote:

but playing 4K movies on my local hard drive is lagged.
SSD 300GB Sata 3

Do you have a spinning hard drive ? You just mention your SSD. There is of course a major speed difference between a spinning HDD and a SSD which could be one explanation.

notooth · 01-21-2018, 02:49 PM

Yes, I have a spinning hard drive, but I put the movies on the SSD. The movie bit rate is about 70000 kb/s.

RadicalDreamer · 01-21-2018, 10:16 PM

If you have an NVIDIA card with recent proprietary drivers installed you might want to try QMPlay2 with CUVID decoder.

notooth · 01-21-2018, 11:23 PM

I have a laptop with the following hardware:
CPU Intel i7 820QM
GPU NVIDIA Quadro FX 880M

After installing the recent proprietary drivers, setting CUVID decoder in QMPlay2, the movie is still laggy.

RadicalDreamer · 01-21-2018, 11:47 PM

In the nvidia-settings application it will show how much your GPU is being utilized to play video. I have a feeling that your hardware is too old to play it at that bitrate. Maybe try 10,000-20,000 kbps.
A 4K video I downloaded off Youtube with QMPlay2 had a bit rate of ~18,000 kbps.

What does top show concerning cpu usage?

notooth · 01-22-2018, 03:43 AM

I do not see the indicator of GPU usage in the NVIDIA Control Panel. The CPU usage is about 90% when playing the movie.

RadicalDreamer · 01-22-2018, 11:09 AM

Quote:

Originally Posted by notooth

I do not see the indicator of GPU usage in the NVIDIA Control Panel. The CPU usage is about 90% when playing the movie.

90% is a lot. I wonder if cuda is being used. QMPlay2 gives me this under the Information tab while playing a file:

Code:

Video streams:
Stream 1 - CUVID decoder, OpenGL 4.6 CUVID

.

Results from QMPlay2:
A 4k ~18000 kbps bitrate video file utilizes 3% of my GPU with 16% Video Engine Utilization. Top shows about 1-1.6 percent of the CPU is being used by user and about 0.5 to 1.0 by system.

Results from VLC on the same file:

A 4k ~18000 kbps bitrate video file utilizes 9-10% of my GPU with 0% Video Engine Utilization. Top shows about 18-22.5 percent of the CPU is being used by user and about 0.5 to 1.0 by system.

VLC uses 10 times the CPU with VA-API than QMPlay2 uses with CUVID on a recent NVIDIA card.

In the long and short branch drivers the nvidia-settings have a menu with

Code:

X Server Information
X Server Display Configuration
X Screen 0
GPU 0 (name of graphics card)<--this line would have that information if you highlighted it.
Application Profiles
nvidia-settings Configuration

notooth · 01-22-2018, 05:24 PM

QMPlay2 give me this information:

Quote:

Video streams:
Stream 1 - FFmpeg, OpenGL 3.3
. codec: hevc

RadicalDreamer · 01-23-2018, 12:10 AM

Quote:

Originally Posted by notooth

QMPlay2 give me this information:

No CUVID for you then. Maybe try to set FFmpeg VDPAU Decoder (highlight it and use the arrows to make it first priority) in Playback settings. Maybe try VA-API after that. These things are probably not properly supported for your card. I have an old 9800m gts and QMPlay2 gives similar information for it that you received.

notooth · 01-23-2018, 03:35 AM

Thank you for your help.

tofino_surfer · 01-26-2018, 09:33 PM

Quote:

Yes, I have a spinning hard drive, but I put the movies on the SSD. The movie bit rate is about 70000 kb/s.

Then you shouldn't talk about your "local hard drive" if you are using an SSD. A bit rate of 70000 kb/s is more compactly termed 70Mb/s and would be much higher than anything off YouTube. Most desktop environments have a hardware monitor that can show the instantaneous network bit rate as you are watching a "4K" YouTube video. Try this.

A 70Mb/s bit rate seems to be overwhelming your hardware.

Quote:

A 4K video I downloaded off Youtube with QMPlay2 had a bit rate of ~18,000 kbps.

This is what I suspected. 19 Mbps is considered a normal HD bitrate and 4K should have 4X the detail. The YouTube "4K" bit rate is over 3X lower than the movie you downloaded.

I recommend trying NVidia VDPAU as well. I don't know if Quadro supports this.

tofino_surfer · 01-26-2018, 10:06 PM

I did some research and your GPU supports VDPAU level C

Quadro FX 880M 0x0A3C C

http://download.nvidia.com/solaris/2...rtedchips.html

From

https://en.wikipedia.org/wiki/VDPAU

Quote:

Nvidia VDPAU Feature Sets[31] are different hardware generations of GPU's supporting different levels of (Nvidia PureVideo) hardware decoding capabilities. For feature sets A, B and C, the maximum video width and height are 2048 pixels, minimum width and height 48 pixels, and all codecs are currently limited to a maximum of 8192 macroblocks (8190 for VC-1/WMV9).

Therefore although your GPU does support VDPAU for level C the maximum size is 2048X2048 so it can't do 4K video.

Does your laptop have a 4K display anyway ?