Pylonsrc for deepstream on Jetson: high latency on high fps

[pabsan-0]

Hello! I'm trying to get a real-time object detection inference pipeline on a Jetson Xavier NX using a Basler camera through pylonsrc, using the inference pipeline show below. However, I'm experiencing significant latency at higher fps requests.

My idea is to retrieve images at high fps from the camera and leave the speed bottleneck to lay somewhere else in the pipeline (I do not have a final target fps). I'm using two reference framerates for comparison:

• pylonsrc config-file=* fps=20, yields ~20 fps as expected, low latency (almost negligible).
• pylonsrc config-file=* fps=90, yields ~30 fps as expected, very high latency (about ~2 sec).

After some testing I've seen that the autovideosink pipeline (also shown below) runs on almost zero latency without regard to the pylonsrc fps, so my guess lies that the delay has to do with computer resources.

Any suggestion to keep an "uncapped" framerate in the Basler without increasing latency by modifying the pipeline/config-file?

Inference pipeline

gst-launch-1.0 pylonsrc config-file=../Basler.pfs fps=20 continuous=true ! \
    queue leaky=2 max-size-buffers=100 max-size-time=0 max-size-bytes=1 ! \
    nvvideoconvert ! 'video/x-raw(memory:NVMM),format=(string)I420,width=640,height=480,framerate=30/1' ! \
    m.sink_0 nvstreammux name=m batch-size=1 width=640 height=480 ! \
    nvvideoconvert ! nvinfer config-file-path=config_infer_primary_yoloV5.txt ! \
    nvmultistreamtiler width=640 height=480 ! \
    nvvideoconvert ! nvdsosd ! nvegltransform ! nveglglessink async=0 sync=0

Autovideosink pipeline

gst-launch-1.0 pylonsrc config-file=../Basler.pfs fps=90 continuous=true ! \
    queue leaky=2 max-size-buffers=100 max-size-time=0 max-size-bytes=1 ! \
    nvvideoconvert ! video/x-raw(memory:NVMM),format=(string)I420,width=640,height=480,framerate=30/1 ! \
    autovideosink

Basler configuration file

Basler.pfs

# {05D8C294-F295-4dfb-9D01-096BD04049F4}
# GenApi persistence file (version 3.1.0)
# Device = Basler::UsbCameraParams -- Basler USB3Vision camera interface -- Device version = 1.0.0 -- Product GUID = 5a809e15-f447-480f-a21f-0fb7256b8400 -- Product version GUID = 685CC8CB-5A68-4BD2-AF5E-B30B155580E1
ExposureAuto	Off
BalanceWhiteAuto	Off
GainAuto	Off
Width	2448
Height	2048
OffsetX	8
OffsetY	4
CenterX	0
CenterY	0
ReverseX	0
ReverseY	0
PixelFormat	YCbCr422_8
TestImageSelector	Off
GainSelector	All
Gain	0.00000
GainSelector	All
BlackLevelSelector	All
BlackLevel	0.00000
BlackLevelSelector	All
Gamma	1.00000
DigitalShift	0
RemoveParameterLimitSelector	Gain
RemoveParameterLimit	0
RemoveParameterLimitSelector	Gain
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BalanceRatio	1.71899
BalanceRatioSelector	Green
BalanceRatio	1.00000
BalanceRatioSelector	Blue
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ColorAdjustmentHue	0.28125
ColorAdjustmentSelector	Yellow
ColorAdjustmentHue	0.12500
ColorAdjustmentSelector	Green
ColorAdjustmentHue	0.37500
ColorAdjustmentSelector	Cyan
ColorAdjustmentHue	0.56250
ColorAdjustmentSelector	Blue
ColorAdjustmentHue	-0.06250
ColorAdjustmentSelector	Magenta
ColorAdjustmentHue	1.93750
ColorAdjustmentSelector	Red
ColorAdjustmentSelector	Red
ColorAdjustmentSaturation	1.03125
ColorAdjustmentSelector	Yellow
ColorAdjustmentSaturation	0.98438
ColorAdjustmentSelector	Green
ColorAdjustmentSaturation	1.28125
ColorAdjustmentSelector	Cyan
ColorAdjustmentSaturation	1.03906
ColorAdjustmentSelector	Blue
ColorAdjustmentSaturation	0.96875
ColorAdjustmentSelector	Magenta
ColorAdjustmentSaturation	0.85156
ColorAdjustmentSelector	Red
ColorTransformationSelector	RGBtoRGB
ColorTransformationValueSelector	Gain00
ColorTransformationValue	1.53125
ColorTransformationValueSelector	Gain01
ColorTransformationValue	-0.31250
ColorTransformationValueSelector	Gain02
ColorTransformationValue	-0.21875
ColorTransformationValueSelector	Gain10
ColorTransformationValue	-0.31250
ColorTransformationValueSelector	Gain11
ColorTransformationValue	1.84375
ColorTransformationValueSelector	Gain12
ColorTransformationValue	-0.53125
ColorTransformationValueSelector	Gain20
ColorTransformationValue	-0.09375
ColorTransformationValueSelector	Gain21
ColorTransformationValue	-0.43750
ColorTransformationValueSelector	Gain22
ColorTransformationValue	1.53125
ColorTransformationSelector	RGBtoRGB
ColorTransformationValueSelector	Gain00
DemosaicingMode	Simple
ShutterMode	Global
ExposureMode	Timed
ExposureTime	26092.0
AcquisitionBurstFrameCount	1
TriggerSelector	FrameBurstStart
TriggerMode	Off
TriggerSelector	FrameStart
TriggerMode	Off
TriggerSelector	FrameStart
TriggerSelector	FrameBurstStart
TriggerSource	Line1
TriggerSelector	FrameStart
TriggerSource	Line1
TriggerSelector	FrameStart
TriggerSelector	FrameBurstStart
TriggerActivation	RisingEdge
TriggerSelector	FrameStart
TriggerActivation	RisingEdge
TriggerSelector	FrameStart
TriggerDelay	0
AcquisitionFrameRateEnable	0
AcquisitionFrameRate	100.00000
DeviceLinkSelector	0
DeviceLinkThroughputLimitMode	On
DeviceLinkSelector	0
DeviceLinkSelector	0
DeviceLinkThroughputLimit	360000000
DeviceLinkSelector	0
ChunkSelector	Gain
ChunkEnable	0
ChunkSelector	ExposureTime
ChunkEnable	0
ChunkSelector	Timestamp
ChunkEnable	0
ChunkSelector	LineStatusAll
ChunkEnable	0
ChunkSelector	CounterValue
ChunkEnable	0
ChunkSelector	SequencerSetActive
ChunkEnable	0
ChunkSelector	PayloadCRC16
ChunkEnable	0
ChunkSelector	Timestamp
ChunkModeActive	0
AutoTargetBrightness	0.30196
AutoFunctionProfile	MinimizeGain
AutoGainLowerLimit	0.00000
AutoGainUpperLimit	36.00000
AutoExposureTimeLowerLimit	29.0
AutoExposureTimeUpperLimit	1000000.0
AutoFunctionROISelector	ROI1
AutoFunctionROIWidth	2464
AutoFunctionROISelector	ROI2
AutoFunctionROIWidth	2448
AutoFunctionROISelector	ROI1
AutoFunctionROISelector	ROI1
AutoFunctionROIHeight	2056
AutoFunctionROISelector	ROI2
AutoFunctionROIHeight	2048
AutoFunctionROISelector	ROI1
AutoFunctionROISelector	ROI1
AutoFunctionROIOffsetX	0
AutoFunctionROISelector	ROI2
AutoFunctionROIOffsetX	8
AutoFunctionROISelector	ROI1
AutoFunctionROISelector	ROI1
AutoFunctionROIOffsetY	0
AutoFunctionROISelector	ROI2
AutoFunctionROIOffsetY	8
AutoFunctionROISelector	ROI1
AutoFunctionROISelector	ROI1
AutoFunctionROIUseBrightness	1
AutoFunctionROISelector	ROI2
AutoFunctionROIUseBrightness	0
AutoFunctionROISelector	ROI1
AutoFunctionROISelector	ROI1
AutoFunctionROIUseWhiteBalance	1
AutoFunctionROISelector	ROI2
AutoFunctionROIUseWhiteBalance	1
AutoFunctionROISelector	ROI1
LUTSelector	Luminance
LUTEnable	0
LUTSelector	Luminance
LUTSelector	Luminance
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[ghazalehtrb]

Hi @pabsan-0, have you tried using the plug-in with deepstream yet? I can get it to work with GStreamer but deepstream cannot build pylonsrc

[pabsan-0]

@ghazalehtrb Hey, yeah I've been using it. This issue has been my only trouble regarding pylonsrc+deepstream, for now I'm simply setting a lower framerate and avoiding the high-latency scenario altogether.

Could you give me more details about your issue, perhaps some sample pipelines? Also I do not fully understand the "deepstream cannot build pylonsrc" part, so details on your setup (jetson, docker, newly-set env variables...) would also be helpful.

[witejas]

@pabsan-0 could share the script regarding how the above mentioned pipeline works for deepstream ?I am not able to run it with deepstream.

[pabsan-0]

@jetsonnx2107 I run those pipelines as is in a bash terminal. Mind that there are no spaces after the \ newline escapes and that the path to the Basler config file exists.

Else show me your output and I'll try to help from there :)