Arch Linux

Spheerys

Member

Registered: 2012-05-01

Posts: 86

4K UHD video is shaking / slow during playing with vlc

Hi,

I have an issue with 4K UHD videos.
Very large files (20Gb) are shaking (jerking) a little bit during playing with VLC or other player.

However, my computer is normally pretty good for this job :

inxi -F give this :

System:    Host: narayan Kernel: 5.7.7-arch1-1 x86_64 bits: 64 Desktop: i3 4.18.1 Distro: Arch Linux 
Machine:   Type: Desktop Mobo: Shuttle model: SH370V2 v: 1.0 serial: <superuser/root required> 
           UEFI [Legacy]: American Megatrends v: 1.06 date: 03/25/2020 
CPU:       Topology: 6-Core model: Intel Core i5-9600K bits: 64 type: MCP L2 cache: 9216 KiB 
           Speed: 800 MHz min/max: 800/4600 MHz Core speeds (MHz): 1: 801 2: 800 3: 800 4: 800 5: 800 6: 800 
Graphics:  Device-1: Intel UHD Graphics 630 driver: i915 v: kernel 
           Display: x11 server: X.Org 1.20.8 driver: intel unloaded: fbdev,modesetting,vesa resolution: 3840x2160~60Hz 
           OpenGL: renderer: Mesa Intel UHD Graphics 630 (CFL GT2) v: 4.6 Mesa 20.1.3 
Audio:     Device-1: Intel Cannon Lake PCH cAVS driver: snd_hda_intel 
           Sound Server: ALSA v: k5.7.7-arch1-1 
Network:   Device-1: Intel I211 Gigabit Network driver: igb 
           IF: enp1s0 state: up speed: 1000 Mbps duplex: full mac: 8b:ee:73:aa:61:b7 
           Device-2: Intel I211 Gigabit Network driver: igb 
           IF: enp2s0 state: down mac: 8b:ee:73:aa:61:b8 
Drives:    Local Storage: total: 465.76 GiB used: 150.75 GiB (32.4%) 
           ID-1: /dev/sda vendor: Crucial model: CT500MX500SSD4 size: 465.76 GiB 
Partition: ID-1: / size: 47.81 GiB used: 17.70 GiB (37.0%) fs: ext4 dev: /dev/sda1 
           ID-2: /home size: 397.86 GiB used: 133.06 GiB (33.4%) fs: ext4 dev: /dev/sda3 
Swap:      Alert: No Swap data was found. 
Sensors:   System Temperatures: cpu: 33.0 C mobo: N/A 
           Fan Speeds (RPM): N/A 
Info:      Processes: 244 Uptime: 1d 18h 59m Memory: 15.53 GiB used: 6.09 GiB (39.2%) Shell: Zsh inxi: 3.1.04 

glxinfo -B give this :

name of display: :0
display: :0  screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: Intel (0x8086)
    Device: Mesa Intel(R) UHD Graphics 630 (CFL GT2) (0x3e98)
    Version: 20.1.3
    Accelerated: yes
    Video memory: 3072MB
    Unified memory: yes
    Preferred profile: core (0x1)
    Max core profile version: 4.6
    Max compat profile version: 4.6
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.2
OpenGL vendor string: Intel
OpenGL renderer string: Mesa Intel(R) UHD Graphics 630 (CFL GT2)
OpenGL core profile version string: 4.6 (Core Profile) Mesa 20.1.3
OpenGL core profile shading language version string: 4.60
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile

OpenGL version string: 4.6 (Compatibility Profile) Mesa 20.1.3
OpenGL shading language version string: 4.60
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile

OpenGL ES profile version string: OpenGL ES 3.2 Mesa 20.1.3
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20

I don't know if it's a driver issue or something else...
Any idea ?

Last edited by Spheerys (2020-07-14 17:49:35)

Morn

Member

Registered: 2012-09-02

Posts: 886

Re: 4K UHD video is shaking / slow during playing with vlc

Perhaps check the output of vainfo and vdpauinfo (see https://wiki.archlinux.org/index.php/Ha … celeration ) and compare it to the video codec info in VLC when playing the file in question. The codec of your video file may lack hardware acceleration on your system.