4K 60 fps video playback is not smooth

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
1

Hi All,
I use the command below to play 4k 60fps video on Xavier NX with a 4k monitor attached.

gst-launch-1.0 filesrc location=bbb_sunflower_2160p_60fps_normal.mp4 ! qtdemux ! h264parse ! nvv4l2decoder ! queue ! nvegltransform ! nveglglessink

I found that the video playback was not smooth. I played the same video on a Xavier NX L4T r32.7.2 and didn’t see the problem.
The Video can be downloaded on this site.

How to fix this issue? Any comments and suggestions will be appreciated.

2

Hi,
Please execute sudo nvpmodel-m 0 and sudo jetson_clocks, and set maximum performance mode to nvv4l2decoder. And check if there is improvement.

3

Hi DaneLLL,
No significant difference was observed after executed these two command.

pcp@pcp-desktop:~$ sudo nvpmodel -m 0
pcp@pcp-desktop:~$ sudo jetson_clocks
pcp@pcp-desktop:~$ sudo nvpmodel -q
NV Power Mode: MODE_15W_2CORE
0
pcp@pcp-desktop:~$ sudo jetson_clocks --show
SOC family:tegra194  Machine:NVIDIA Jetson Xavier NX Developer Kit
Online CPUs: 0-1
cpu0: Online=1 Governor=schedutil MinFreq=1907200 MaxFreq=1907200 CurrentFreq=1907200 IdleStates: C1=0 c6=0
cpu1: Online=1 Governor=schedutil MinFreq=1907200 MaxFreq=1907200 CurrentFreq=1907200 IdleStates: C1=0 c6=0
cpu2: Online=0 Governor=schedutil MinFreq=1907200 MaxFreq=1907200 CurrentFreq=1907200 IdleStates: C1=0 c6=0
cpu3: Online=0 Governor=schedutil MinFreq=1907200 MaxFreq=1907200 CurrentFreq=1907200 IdleStates: C1=0 c6=0
cpu4: Online=0 Governor=schedutil MinFreq=1907200 MaxFreq=1907200 CurrentFreq=1907200 IdleStates: C1=0 c6=0
cpu5: Online=0 Governor=schedutil MinFreq=1907200 MaxFreq=1907200 CurrentFreq=1907200 IdleStates: C1=0 c6=0
GPU MinFreq=1109250000 MaxFreq=1109250000 CurrentFreq=1109250000
EMC MinFreq=204000000 MaxFreq=1600000000 CurrentFreq=1600000000 FreqOverride=1
DLA0_CORE MinFreq=0 MaxFreq=1100800000 CurrentFreq=1100800000
DLA0_FALCON MinFreq=0 MaxFreq=640000000 CurrentFreq=640000000
DLA1_CORE MinFreq=0 MaxFreq=1100800000 CurrentFreq=1100800000
DLA1_FALCON MinFreq=0 MaxFreq=640000000 CurrentFreq=640000000
PVA0_VPS0 MinFreq=0 MaxFreq=819200000 CurrentFreq=819200000
PVA0_VPS1 MinFreq=0 MaxFreq=819200000 CurrentFreq=819200000
PVA0_AXI MinFreq=0 MaxFreq=601600000 CurrentFreq=601600000
PVA1_VPS0 MinFreq=0 MaxFreq=819200000 CurrentFreq=819200000
PVA1_VPS1 MinFreq=0 MaxFreq=819200000 CurrentFreq=819200000
PVA1_AXI MinFreq=0 MaxFreq=601600000 CurrentFreq=601600000
CVNAS MinFreq=0 MaxFreq=576000000 CurrentFreq=576000000
FAN Dynamic Speed control=active hwmon2_pwm=160
NV Power Mode: MODE_15W_2CORE
5

Hi,
You mention there is no problem on r32.7.2(Jetpack 4.6.2). Which version do you observe the issue?

6

Hi DaneLLL,
It is r35.1.0.

7

Hi,
Could you try the commands and share the fps prints for reference:

$ gst-launch-1.0 -v filesrc location=bbb_sunflower_2160p_60fps_normal.mp4 ! qtdemux ! h264parse ! nvv4l2decoder ! queue ! nvegltransform ! fpsdisplaysink text-overlay=0 video-sink=nveglglessink
$ gst-launch-1.0 -v filesrc location=bbb_sunflower_2160p_60fps_normal.mp4 ! qtdemux ! h264parse ! nvv4l2decoder ! queue ! nvegltransform ! fpsdisplaysink text-overlay=0 video-sink=nveglglessink sync=0
$ gst-launch-1.0 -v filesrc location=bbb_sunflower_2160p_60fps_normal.mp4 ! qtdemux ! h264parse ! nvv4l2decoder ! queue ! fpsdisplaysink text-overlay=0 video-sink=fakesink
8

Hi DaneLLL,
Logs are attached.

r32-7-2.log (503.4 KB)
r35-1-0.log (659.8 KB)

9

Hi,
Please share the information:

cat /sys/class/graphics/fb0/mode

Would like to confirm the TV is in 4K 60 fps mode.

10

Hi DaneLLL,

pcp@pcp-desktop:~$ cat /sys/class/graphics/fb0/mode
U:1920x1080p-60
11

Hi,
Please downscale the source to fit the display resolution like:

$ gst-launch-1.0 filesrc location=bbb_sunflower_2160p_60fps_normal.mp4 ! qtdemux ! h264parse ! nvv4l2decoder enable-max-performance=1 ! nvvidconv ! 'video/x-raw(memory:NVMM),format=NV12,width=1920,height=1080' ! queue ! nvegltransform ! fpsdisplaysink text-overlay=0 video-sink=nveglglessink sync=false -v

And check if it can achieve target frame rate.

12

Hi DaneLLL,
It can achieve 60fps now.
Do I still have to let nvvidconv convert video to 1080p if Xavier NX connects with 4K monitor ?

13

Hi,
If the display mode is in 4K, it is not required to downscale the resolution.

14

Hi DaneLLL,
I test this with a 4k monotor. Please see the log attached.
The video is still not played smoothly if I don’t downd scale the video to 1080p. Is it a bug or limitation for L4T r35.1.0 playing 4k 60fps video? Because I don’t see this issue on L4T r32.7.1.
R35.1.0_4K_Monitor.txt (168.2 KB)

15

Hi,
Do you observe the issue in setting sync=0? gstreamer frameworks are upgraded and probably the synchronization mechanism doesn’t work properly.

17

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