4K 60fps videos plays at 30fps on Jetson Nano Developer Kit

Robotics & Edge Computing Jetson Systems Jetson Nano
1

I’m trying to play some 4K 60fps videos on Jetson Nano Developer Kit, but they are played at only 30fps.

This is my pipeline:

gst-launch-1.0 --gst-debug="*:1,omxvideodec:5,omxvideosink:5" filesrc location="/var/volatile/264-60.mkv" ! decodebin ! videoconvert ! nvoverlaysink

These lines are printed for every frame decoded or played:

0:00:15.478098436  5246   0x55a1834630 DEBUG            omxvideodec gstomxvideodec.c:3630:gst_omx_video_dec_handle_frame:<omxh265dec-omxh265dec0> Handling frame
0:00:15.490141786  5246   0x7f9808a370 DEBUG           omxvideosink gstomxvideosink.c:1377:gst_omx_video_sink_show_frame:<nvoverlaysink-nvoverlaysink0> Received the frame

I found the videos are decoded as 60fps, but played at only 30fps.

I also tried nvdrmvideosink with “nvdrmvideosink:5”, and get similar result. I guess I can try other sinks, but I hope they can work without x11 or weston.

The videos are downloaded from https://4kmedia.org, and I used VLC to verify they are 4K 60fps. My image was built from yocto, GitHub - OE4T/meta-tegra: BSP layer for NVIDIA Jetson platforms, based on L4T with the branch “warrior”.

Is there any way to improve the performance?

Thanks.

2

Hi,
Please execute ‘sudo jetson_clocks’ and try the following command:

$ gst-launch-1.0 uridecodebin uri=file:///home/nvidia/jellyfish-5-mbps-hd-h264.mkv ! fpsdisplaysink video-sink=nvoverlaysink text-overlay=0 -v

If your TV does not support 4K, please add nvvidconv plugin to downscale to 1080p:

$ gst-launch-1.0 uridecodebin uri=file:///home/nvidia/Foreman_H264.mp4 ! nvvidconv ! 'video/x-raw(memory:NVMM),width=1920,height=1080' ! fpsdisplaysink video-sink=nvoverlaysink text-overlay=0 -v
3

Thank you.

My monitor does support 4K. I was using yocto, which doesn’t have jetson_clocks. So I’m now trying the ubuntu image which I downloaded.

$ gst-launch-1.0 uridecodebin uri=file:///home/jetson/Videos/264-60.mkv ! fpsdisplaysink video-sink=nvoverlaysink text-overlay=0 -v
......
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstNvOverlaySink-nvoverlaysink:nvoverlaysink-nvoverlaysink0: sync = true
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 22, dropped: 0, current: 43.09, average: 43.09
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 39, dropped: 0, current: 32.13, average: 37.51
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 54, dropped: 0, current: 29.94, average: 35.05
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 70, dropped: 1, fps: 30.06, drop rate: 1.88
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 86, dropped: 1, current: 30.00, average: 33.00
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 101, dropped: 1, current: 30.00, average: 32.51
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 115, dropped: 2, fps: 26.55, drop rate: 1.90
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 131, dropped: 2, current: 30.24, average: 31.47
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 146, dropped: 2, current: 29.34, average: 31.24
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 163, dropped: 4, fps: 30.37, drop rate: 3.57
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 179, dropped: 4, current: 31.82, average: 31.20
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 194, dropped: 5, fps: 28.60, drop rate: 1.91
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 211, dropped: 6, fps: 33.23, drop rate: 1.95
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 226, dropped: 8, fps: 26.76, drop rate: 3.57
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 243, dropped: 8, current: 33.57, average: 31.00
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 259, dropped: 8, current: 30.00, average: 30.93
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 274, dropped: 8, current: 29.09, average: 30.83
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 289, dropped: 9, fps: 28.65, drop rate: 1.91
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 304, dropped: 9, current: 29.62, average: 30.65
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 319, dropped: 9, current: 29.75, average: 30.61
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 334, dropped: 9, current: 29.20, average: 30.54
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 351, dropped: 10, fps: 32.14, drop rate: 1.89
/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 367, dropped: 11, fps: 31.89, drop rate: 1.99

I tried it before and after ‘sudo jetson_clocks’, and I got almost same results.

4

I’m suspecting this is the issue:

jetson@jetson-board1:~$ cat /sys/class/graphics/fb0/mode
U:3840x2160p-30

Same on both yocto build and ubuntu.

I also checked /sys/class/graphics/fb0/modes. There are a few entries with “3840x2160”, but none of them is higher than 30.

5

Hi,
Please run below to check if the TV supports 4Kp60

nvidia@nvidia-desktop:~$ export DISPLAY=:1(or 0)
nvidia@nvidia-desktop:~$ xrandr
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 530mm x 300mm
   1920x1080     60.00*+
   1280x1024     75.03    60.00
   1152x864      75.00
   1024x768      75.03    60.01
   800x600       75.00    60.32
   720x400       70.04
   640x480       75.00    59.94
6

It turns out to be the monitor. The spec says “HDMI: 3840 x 2160/30Hz (Maximum) DP: 3840 x 2160/60Hz (Maximum)”. Unfortunately I was using HDMI. I switched to DP and the videos play at 60fps. Also I found another 4K monitor, and videos can play at 60fps over HDMI.

Thanks a lot for your help.

7

Glad to hear that it works. Thanks for sharing guidance of checking the monitor spec.