Video Encoding Support for the Dragonwing EVK Board

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Qualcomm Dragonwing Technical Guide

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Qualcomm Dragonwing Technical Guide

Table of Contents [Sticky]

• Introduction
  • What is the Qualcomm Dragonwing IQ9?
  • Why the Qualcomm Dragonwing IQ9?
  • RidgeRun Services
  • RidgeRun Products
• Carrier Boards
  • IQ-9075 EVK
• EVK Board Bring Up
  • Yocto Build
    • Setup Environment
    • Building an Image - Qualcomm Linux 2.0
    • Building an Image - Qualcomm Linux 1.8
    • Flashing an Image
    • Getting into the Board
  • Ubuntu
    • Features Available
    • Setup Environment
    • Flashing Ubuntu
    • Getting into the Board
• GStreamer
  • Enable GStreamer Support
  • Example Pipelines
  • Performance
• Multimedia Support
  • Video
    • Video Capture
    • Video Encoding
    • Video Decoding
    • Video Transformation
  • Streaming
    • Streaming over UDP
    • Streaming over RTSP
    • Streaming over MoQ
  • Hardware Acceleration
    • GPU Enabling and Usage
    • ISP Enabling and Usage
    • VPU Enabling and Usage
    • NPU Enabling and Usage
• Security Features
  • Secure Boot
  • Disk Encryption
  • TEE
  • OTA
• Contact Us

Problems running the pipelines shown on this page? Please see our GStreamer Debugging guide for help .

Info

The following tests were done with an IMX577 camera connected to the Dragonwing IQ-9075 EVK

Video Encoding

The following elements were tested on the Ubuntu Image (24.04 LTS) provided, and with the packages installed in the GStreamer Section. They were tested for both their average performance as well as their limit performance for different supported formats following the instructions discussed in the Performance Section.

CPU Encoders

These are the supported CPU Encoders for the Dragonwing EVK Board:

• x264enc

• Example pipeline for the x264enc element:

gst-launch-1.0 -e -v qtiqmmfsrc camera=0 ! "video/x-raw,format=NV12,width=1920,height=1080,framerate=30/1,interlace-mode=progressive,colorimetry=bt601" ! x264enc bitrate=6000 speed-preset=ultrafast tune=zerolatency ! h264parse ! mp4mux ! filesink location=x264enc-test.mp4

• Performance measurements for the x264enc element:

Format	Resolution	Average Performance				Limit Performance
		%MEM	RSS (KB)	BPS	CPU (%)	FPS	Mean FPS
NV12	1280x720	0.0	27792	99880.000	50	264.328	269.958
NV12	1920x1080	0.1	40084	100912.000	57	168.299	161.116
NV12	3840x2160	0.2	104832	125440.000	67	62.899	59.653
I420	1280x720	0.0	27792	98056.000	49	248.869	248.757
I420	1920x1080	0.1	40224	97200.000	56	174.293	163.764
I420	3840x2160	0.2	104828	125440.000	67	63.079	58.831

• x265enc

• Example pipeline for the x265enc element:

 gst-launch-1.0 -e qtiqmmfsrc name=camsrc camera=0 ! "video/x-raw,format=NV12,width=1920,height=1080,framerate=30/1" ! videoconvert ! "video/x-raw,format=I420" ! queue ! x265enc ! h265parse ! mp4mux ! filesink location=x265enc-test.mp4

• Performance measurements for the x265enc element:

Format	Resolution	Average Performance				Limit Performance
		%MEM	RSS (KB)	BPS	CPU (%)	FPS	Mean FPS
I420	1280x720	0.2	74892	38800.000	67	45.750	41.179
I420	1920x1080	0.3	130364	21320.000	66	20.512	20.998
I420	3840x2160	1.1	424960	6568.000	71	6.728	5.054

There are other software-based encoders:

• openh264enc
• vp8enc
• vp9enc
• av1enc
• svtav1enc
• theoraenc

VPU Encoders

These are the supported Hardware Accelerated Encoders for the Dragonwing EVK Board. For these specific encoders, the extra-controls options can be found in the VPU Enabling section.

• v4l2h264enc
  • Available options:

Property	Description	Type (Default Value)	Values / Range
capture-io-mode	Capture I/O mode matching the source pad behavior.	GstV4l2IOMode (auto)	auto, rw, mmap, userptr, dmabuf, dmabuf-import
device	Device location used by the encoder.	String (/dev/video33)	Device node path
device-fd	File descriptor associated with the device.	Integer (-1)	-1–2147483647
device-name	Human-readable device name.	String (null)	Any valid device name
extra-controls	Extra V4L2 controls (CIDs) applied to the encoder.	GstStructure	Boxed pointer
min-force-key-unit-interval	Minimum interval between force-keyunit requests.	Unsigned Integer64 (0)	0–18446744073709551615 ns
name	Name assigned to the encoder instance.	String (v4l2h264enc0)	Any valid element name
output-io-mode	Output side I/O mode matching the sink pad behavior.	GstV4l2IOMode (auto)	auto, rw, mmap, userptr, dmabuf, dmabuf-import
parent	Parent object of the encoder element.	GstObject	Any GstObject
qos	Enables handling of downstream QoS events.	Boolean (false)	true, false

• Example pipeline for the v4l2h264enc element:

gst-launch-1.0 -e -v qtiqmmfsrc camera=0 ! "video/x-raw,format=NV12,width=1920,height=1080,framerate=30/1,interlace-mode=progressive,colorimetry=bt601" ! v4l2h264enc capture-io-mode=4 output-io-mode=5 extra-controls="controls,video_bitrate=12000000,video_bitrate_mode=0;" ! h264parse ! mp4mux ! filesink location=v4l2h264enc-camera-encoding.mp4

• Performance measurements for the v4l2h264enc element:

Format	Resolution	Average Performance				Limit Performance
		%MEM	RSS (KB)	BPS	CPU (%)	FPS	Mean FPS
NV12	1280x720	0.1	40580	2652256.000	20	1025.756	1021.513
NV12	1920x1080	0.2	72448	2423712.000	15	567.225	563.829
NV12	3840x2160	0.6	246884	2070280.000	11	202.389	202.405

• v4l2h265enc
  • Available options:

Property	Description	Type (Default Value)	Values / Range
capture-io-mode	Capture I/O mode matching the source pad behavior.	GstV4l2IOMode (auto)	auto, rw, mmap, userptr, dmabuf, dmabuf-import
device	Device location used by the encoder.	String (/dev/video33)	Device node path
device-fd	File descriptor associated with the device.	Integer (-1)	-1–2147483647
device-name	Human-readable device name.	String (null)	Any valid device name
extra-controls	Extra V4L2 controls (CIDs) applied to the encoder.	GstStructure	Boxed pointer
min-force-key-unit-interval	Minimum interval between force-keyunit requests in nanoseconds.	Unsigned Integer64 (0)	0–18446744073709551615 ns
name	Name assigned to the encoder instance.	String (v4l2h265enc0)	Any valid element name
output-io-mode	Output side I/O mode matching the sink pad behavior.	GstV4l2IOMode (auto)	auto, rw, mmap, userptr, dmabuf, dmabuf-import
parent	Parent object of the encoder element.	GstObject	Any GstObject
qos	Enables handling of downstream QoS events.	Boolean (false)	true, false

• Example pipeline for the v4l2h265enc element:

gst-launch-1.0 -e -v qtiqmmfsrc camera=0 ! "video/x-raw,format=NV12,width=1920,height=1080,framerate=30/1,interlace-mode=progressive,colorimetry=bt601" ! v4l2h265enc capture-io-mode=4 output-io-mode=5 extra-controls="controls,video_bitrate=12000000,video_bitrate_mode=0;" ! h265parse ! mp4mux ! filesink location=v4l2h265enc-camera-encoding.mp4

• Performance measurement for the v4l2h265enc element:

Format	Resolution	Average Performance				Limit Performance
		%MEM	RSS (KB)	BPS	CPU (%)	FPS	Mean FPS
NV12	1280x720	0.1	46436	318304.000	18	821.056	821.361
NV12	1920x1080	0.1	42640	305264.000	12	385.782	386.862
NV12	3840x2160	0.7	273016	512888.000	9	207.150	207.279

Attention

The limit performance performs low-entropy encoding, with replicated frames, which illustrates the BW of the encoder/decoder

Qualcomm Dragonwing Technical Guide

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