View source for GStreamer Video Stabilizer for NVIDIA Jetson Boards/Performance/TX1/TX2

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The following section describes some relevant performance measurements during video stabilization for a few standard resolutions. It begins with a summary of the results detailed in the following sections, as well as the pipelines used to capture such results.


__TOC__

== Summary == 
=== Benchmarking ===

==== Standalone element ====
===== Test Conditions =====
The following measurements were taken with the board on high-performance mode enabled, which was attained by running the following commands:
<syntaxhighlight lang=bash>
sudo nvpmodel -m 0
sudo jetson_clocks
</syntaxhighlight>

All the measurements bellow where made using the following minimal pipeline.
<syntaxhighlight lang=bash>
PATH_TO_FILE=path_to_file.rgba
WIDTH=1920
HEIGHT=1080
FRAME_SIZE=$(($WIDTH * $HEIGHT * 4))

gst-launch-1.0  filesrc location=$PATH_TO_FILE blocksize=$FRAME_SIZE ! videoparse format=rgba width=$WIDTH height=$HEIGHT ! nvstabilize ! fakesink sync=true
</syntaxhighlight>

Note that this pipeline attempts to be as the least invasive as possible so the only processing element is GstNvStabilize.

===== Maximum and minimum framerate =====
These measurements were taken with the pipeline above, but without any limitation regarding to the framerate. In the next table, you can find the maximum, minimum, and average framerate for video input and different resolution stabilized by the plugin. 

{| class="wikitable" style="margin: 1em auto 1em auto"
|-
! Resolution !! Maximum framerate !! Minimum framerate !! Average
|-
| 640x480 || 78.37 || 53.94 || 72.20
|-
| 1280x720 || 49.11 ||	39.25 || 46.62 
|-
| 1920x1080 || 23.62 ||	17.54 || 21.84 
|-
| 3840×2160 || 11.86 ||	5.96 || 7.22

|}
<!-----
<span style="color:red"> '''Note:''' To take into account the framerate relies on the movement of the video. </span> 
---->
{{Ambox
|type=notice
|small=left
|issue=''' To take into account the framerate relies on the movement of the video.'''
|style=width:unset;
}}

[[File:Max-min-framerate-tx2.png|frame|center|Maximum and minimum framerate for different resolutions.]]

===== CPU =====

{| class="wikitable" style="margin: 1em auto 1em auto"
|-
! Resolution !! CPU 0 !! CPU 1 !! CPU 2 !! CPU 3 !! CPU4 !! CPU5 !! Average (reported by top)
|-
| 640x480@25Fps || 0.52 || 11.6 || 18.54 || 0.14 || 3.61 || 0.71 || 21.9

|-
| 1280x720@25Fps || 4.7 ||	49.3 ||	40 ||	1.28 ||	12.5 ||	1.21 ||		38.2

|-
| 1920x1080@25Fps || 418 ||	34.23 ||	34 ||	2.8 || 	3.11 ||	1.73 ||		76.6

|-
| 2048×1080@25Fps || 4.13 ||	65.22 || 61.4 || 2.86  ||	1.86 ||	1.52	||	116

|}
[[File:Cpu tx2.png|frame|center|Cpu usage for different resolutions.]]

===== GPU =====

{| class="wikitable" style="margin: 1em auto 1em auto"
|-
! Resolution !! GPU
|-
| 640x480@25Fps || 1.64
|-
| 1280x720@25Fps || 3.57
|-
| 1920x1080@25Fps || 8.26
|-
| 2048×1080@25Fps || 9.43
|}
[[File:GPU tx2.png|frame|center|GPU usage for different resolutions.]]

===== RAM =====

{| class="wikitable" style="margin: 1em auto 1em auto"
|-
! Resolution !! RAM
|-
| 640x480@25Fps || 1199/7861MB
|-
| 1280x720@25Fps || 1230/7861MB
|-
| 1920x1080@25Fps || 1307/7861MB
|-
| 2048×1080@25Fps || 1317/7861MB
|}
[[File:RAM tx2.png|frame|center|RAM consumption for different resolutions.]]

=== Glass-to-glass latency === 
Latency was measured as shown in the picture, and the following are the approximate results. It is important to notice that latency can be affected by the parameters selected on the pipeline, specifically the queue-size property of the gst-nvstabilize element, as further explained on the [https://developer.ridgerun.com/wiki/index.php?title=GStreamer_Video_Stabilizer_for_NVIDIA_Jetson_Boards/User_Guide User Guide]. The pipeline used was the following:

<!--------
'''Note:''' the following latency measurements were '''NOT''' taken with high-performance enabled, given that the chosen resolution did not require it.
---->

{{Ambox
|type=notice
|small=left
|issue='''The following latency measurements were '''NOT''' taken with high-performance enabled, given that the chosen resolution did not require it.'''
|style=width:unset;
}}

<syntaxhighlight lang=bash>
gst-launch-1.0 v4l2src device=/dev/video0 ! 'video/x-raw,width=1280,height=720' ! nvvidconv ! 'video/x-raw(memory:NVMM),width=1280,height=720,format=RGBA'  ! nvvidconv ! queue max-size-buffers=1 leaky=downstream ! nvstabilize queue-size=5 ! nvvidconv ! nvoverlaysink sync=false
</syntaxhighlight>
 

[[File:Photo5174730964096624673.jpg| 800x411px| frame thumb |center|Glass-to-glass latency measurement]]


''' 1280x720@30Fps '''
{| class="wikitable" style="margin: 1em auto 1em auto"
|-
! queue-size !! Latency (ms)
|-
| No stabilizer || 140.8
|- 
| 1 || 254
|-
| 2 || 258
|-
| 3 || 288
|-
| 4 || 328.8
|-
| 5 || 412.6
|-
| 6 || 412
|}

[[File:Lat tx2.png|frame|center|Latency measurements varying queue size.]]
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