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Timeouts with low AcquisitionFrameRate #857

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Timeouts with low AcquisitionFrameRate#857
@bkekez

Description

@bkekez
bkekez
opened on Oct 6, 2025

Describe what you want to implement and what the issue & the steps to reproduce it are:

I have an issue with timeouts when AcquisitionFrameRate is set low (1.0 fps):

% python camera_test.py
Name: Basler a2A1920-51gcBAS (40617123), IP: x.x.x.x, Serial: x
Grab started -  a2A1920-51gcBAS
Error:  3774873620 The buffer was incompletely grabbed. This can be caused by performance problems of the network hardware used, i.e., the network adapter, switch, or Ethernet cable. Buffer underruns can also cause image loss. To fix this, use the pylonGigEConfigurator tool to optimize your setup and use more buffers for grabbing in your application to prevent buffer underruns. Check the FrameRetention setting.
Error:  3774873620 The buffer was incompletely grabbed. This can be caused by performance problems of the network hardware used, i.e., the network adapter, switch, or Ethernet cable. Buffer underruns can also cause image loss. To fix this, use the pylonGigEConfigurator tool to optimize your setup and use more buffers for grabbing in your application to prevent buffer underruns. Check the FrameRetention setting.
Error:  3774873620 The buffer was incompletely grabbed. This can be caused by performance problems of the network hardware used, i.e., the network adapter, switch, or Ethernet cable. Buffer underruns can also cause image loss. To fix this, use the pylonGigEConfigurator tool to optimize your setup and use more buffers for grabbing in your application to prevent buffer underruns. Check the FrameRetention setting.
Error:  3774873620 The buffer was incompletely grabbed. This can be caused by performance problems of the network hardware used, i.e., the network adapter, switch, or Ethernet cable. Buffer underruns can also cause image loss. To fix this, use the pylonGigEConfigurator tool to optimize your setup and use more buffers for grabbing in your application to prevent buffer underruns. Check the FrameRetention setting.
Error:  3774873620 The buffer was incompletely grabbed. This can be caused by performance problems of the network hardware used, i.e., the network adapter, switch, or Ethernet cable. Buffer underruns can also cause image loss. To fix this, use the pylonGigEConfigurator tool to optimize your setup and use more buffers for grabbing in your application to prevent buffer underruns. Check the FrameRetention setting.
Error:  3774873620 The buffer was incompletely grabbed. This can be caused by performance problems of the network hardware used, i.e., the network adapter, switch, or Ethernet cable. Buffer underruns can also cause image loss. To fix this, use the pylonGigEConfigurator tool to optimize your setup and use more buffers for grabbing in your application to prevent buffer underruns. Check the FrameRetention setting.
Grab ended

Here is the test script:

from pypylon import pylon
import time

cameraip = 'x.x.x.x'

# get device with defined ip address
devices = pylon.TlFactory.GetInstance().EnumerateDevices()
device = None
for dev in devices:
    if dev.GetIpAddress() == cameraip:
        device = dev
        print(f"Name: {dev.GetFriendlyName()}, IP: {dev.GetIpAddress()}, Serial: {dev.GetSerialNumber()}")

if not device:
    exit

# conecting to the first available camera
camera = pylon.InstantCamera(pylon.TlFactory.GetInstance().CreateDevice(device))
camera.Open()

pylon.FeaturePersistence.Load("camera-features.pfs", camera.GetNodeMap(), True)

class SGNImageEventHandler(pylon.ImageEventHandler):
    def OnImageGrabbed(self, camera, grabResult):
        if grabResult.GrabSucceeded():
            img_number=int(grabResult.ImageNumber)
            print(img_number)
        else:
            print("Error: ", grabResult.ErrorCode, grabResult.ErrorDescription)

camera.RegisterImageEventHandler(SGNImageEventHandler(),pylon.RegistrationMode_Append, pylon.Cleanup_Delete)  

# converting to opencv bgr format
converter = pylon.ImageFormatConverter()
converter.OutputPixelFormat = pylon.PixelType_BGR8packed
converter.OutputBitAlignment = pylon.OutputBitAlignment_MsbAligned

# Grabing Continusely (video) with minimal delay
camera.StartGrabbing(pylon.GrabStrategy_LatestImageOnly, pylon.GrabLoop_ProvidedByInstantCamera) 
print("Grab started - ",camera.GetDeviceInfo().GetModelName())
start_rec=int(time.time())
while int(time.time())-start_rec<=5 and camera.IsGrabbing():
    time.sleep(0.005)
camera.Close()
print("Grab ended")

# Releasing the resource    
camera.StopGrabbing()
camera.Close()

And camera features file:

# {05D8C294-F295-4dfb-9D01-096BD04049F4}
# GenApi persistence file (version 3.1.0)
# Device = Basler::vg4b_imx392c_bas -- Basler GigEVision camera interface -- Device version = 1.0.0 -- Product GUID = 6ad1a348-ddd8-324e-bf8a-978e9f016f7f -- Product version GUID = 31df51b7-80e2-3d20-b89c-870ab5ad98eb
ReverseX	0
ReverseY	0
Width	1936
Height	1216
OffsetX	0
OffsetY	0
PixelFormat	BayerRG8
TestPattern	Off
BslMultipleROIColumnsEnable	0
BslMultipleROIColumnSelector	Column1
BslMultipleROIColumnSize	1936
BslMultipleROIColumnSelector	Column2
BslMultipleROIColumnSize	0
BslMultipleROIColumnSelector	Column1
BslMultipleROIColumnSelector	Column1
BslMultipleROIColumnOffset	0
BslMultipleROIColumnSelector	Column2
BslMultipleROIColumnOffset	1936
BslMultipleROIColumnSelector	Column1
BslMultipleROIRowsEnable	0
BslMultipleROIRowSelector	Row1
BslMultipleROIRowSize	1216
BslMultipleROIRowSelector	Row2
BslMultipleROIRowSize	0
BslMultipleROIRowSelector	Row1
BslMultipleROIRowSelector	Row1
BslMultipleROIRowOffset	0
BslMultipleROIRowSelector	Row2
BslMultipleROIRowOffset	1216
BslMultipleROIRowSelector	Row1
BslAcquisitionStopMode	AbortExposure
ExposureTimeMode	Common
ExposureTimeSelector	Common
ExposureTime	4965.0
ExposureTimeSelector	Common
ExposureAuto	Off
ExposureMode	Timed
BslTransferBitDepthMode	Auto
BslSensorBitDepthMode	Auto
AcquisitionFrameRate	1.0
AcquisitionFrameRateEnable	1
TriggerSelector	FrameBurstStart
TriggerMode	Off
TriggerSelector	FrameBurstEnd
TriggerMode	Off
TriggerSelector	FrameBurstActive
TriggerMode	Off
TriggerSelector	FrameStart
TriggerMode	Off
TriggerSelector	FrameEnd
TriggerMode	Off
TriggerSelector	FrameActive
TriggerMode	Off
TriggerSelector	ExposureStart
TriggerMode	Off
TriggerSelector	ExposureEnd
TriggerMode	Off
TriggerSelector	ExposureActive
TriggerMode	Off
TriggerSelector	FrameStart
TriggerSelector	FrameBurstStart
TriggerSource	Software
TriggerSelector	FrameBurstEnd
TriggerSource	Software
TriggerSelector	FrameBurstActive
TriggerSource	Line1
TriggerSelector	FrameStart
TriggerSource	Software
TriggerSelector	FrameEnd
TriggerSource	Software
TriggerSelector	FrameActive
TriggerSource	Line1
TriggerSelector	ExposureStart
TriggerSource	Software
TriggerSelector	ExposureEnd
TriggerSource	Software
TriggerSelector	ExposureActive
TriggerSource	Line1
TriggerSelector	FrameStart
TriggerSelector	FrameBurstActive
TriggerActivation	LevelHigh
TriggerSelector	FrameActive
TriggerActivation	LevelHigh
TriggerSelector	ExposureActive
TriggerActivation	LevelHigh
TriggerSelector	FrameStart
TriggerSelector	FrameBurstStart
TriggerDelay	0.0
TriggerSelector	FrameBurstEnd
TriggerDelay	0.0
TriggerSelector	FrameBurstActive
TriggerDelay	0.0
TriggerSelector	FrameStart
TriggerDelay	0.0
TriggerSelector	FrameEnd
TriggerDelay	0.0
TriggerSelector	FrameActive
TriggerDelay	0.0
TriggerSelector	ExposureStart
TriggerDelay	0.0
TriggerSelector	ExposureEnd
TriggerDelay	0.0
TriggerSelector	ExposureActive
TriggerDelay	0.0
TriggerSelector	FrameStart
BslAcquisitionBurstMode	Standard
AcquisitionBurstFrameCount	1
AutoTargetBrightness	0.500
AutoFunctionProfile	MinimizeGain
AutoGainLowerLimit	0.000
AutoGainUpperLimit	24.000
AutoExposureTimeLowerLimit	1.0
AutoExposureTimeUpperLimit	100000.0
AutoFunctionROISelector	ROI1
AutoFunctionROIWidth	1920
AutoFunctionROISelector	ROI2
AutoFunctionROIWidth	1920
AutoFunctionROISelector	ROI1
AutoFunctionROISelector	ROI1
AutoFunctionROIHeight	1200
AutoFunctionROISelector	ROI2
AutoFunctionROIHeight	1200
AutoFunctionROISelector	ROI1
AutoFunctionROISelector	ROI1
AutoFunctionROIOffsetX	8
AutoFunctionROISelector	ROI2
AutoFunctionROIOffsetX	8
AutoFunctionROISelector	ROI1
AutoFunctionROISelector	ROI1
AutoFunctionROIOffsetY	8
AutoFunctionROISelector	ROI2
AutoFunctionROIOffsetY	8
AutoFunctionROISelector	ROI1
AutoFunctionROISelector	ROI1
AutoFunctionROIUseBrightness	1
AutoFunctionROISelector	ROI2
AutoFunctionROIUseBrightness	0
AutoFunctionROISelector	ROI1
AutoFunctionROISelector	ROI1
AutoFunctionROIUseWhiteBalance	0
AutoFunctionROISelector	ROI2
AutoFunctionROIUseWhiteBalance	1
AutoFunctionROISelector	ROI1
AutoFunctionROISelector	ROI1
AutoFunctionROIHighlight	0
AutoFunctionROISelector	ROI2
AutoFunctionROIHighlight	0
AutoFunctionROISelector	ROI1
GainSelector	All
Gain	0.000
GainSelector	All
GainSelector	All
GainAuto	Off
GainSelector	All
BlackLevelSelector	All
BlackLevel	0.000
BlackLevelSelector	All
Gamma	1.0000
DigitalShift	0
BslColorSpace	sRgb
BslLightSourcePreset	Daylight5000K
BslLightSourcePresetFeatureSelector	WhiteBalance
BslLightSourcePresetFeatureEnable	1
BslLightSourcePresetFeatureSelector	ColorTransformation
BslLightSourcePresetFeatureEnable	1
BslLightSourcePresetFeatureSelector	ColorAdjustment
BslLightSourcePresetFeatureEnable	1
BslLightSourcePresetFeatureSelector	WhiteBalance
BslHue	0.0
BslSaturation	1.000
BslBrightness	0.000
BslContrastMode	Linear
BslContrast	0.000
BslDemosaicingMode	Auto
BalanceRatioSelector	Red
BalanceRatio	1.0000
BalanceRatioSelector	Green
BalanceRatio	1.0000
BalanceRatioSelector	Blue
BalanceRatio	1.0000
BalanceRatioSelector	Red
BalanceWhiteAuto	Off
ColorTransformationSelector	RGBtoRGB
ColorTransformationEnable	0
ColorTransformationSelector	RGBtoRGB
ColorTransformationSelector	RGBtoRGB
ColorTransformationValueSelector	Gain00
ColorTransformationValue	1.0000
ColorTransformationValueSelector	Gain01
ColorTransformationValue	0.0000
ColorTransformationValueSelector	Gain02
ColorTransformationValue	0.0000
ColorTransformationValueSelector	Gain10
ColorTransformationValue	0.0000
ColorTransformationValueSelector	Gain11
ColorTransformationValue	1.0000
ColorTransformationValueSelector	Gain12
ColorTransformationValue	0.0000
ColorTransformationValueSelector	Gain20
ColorTransformationValue	0.0000
ColorTransformationValueSelector	Gain21
ColorTransformationValue	0.0000
ColorTransformationValueSelector	Gain22
ColorTransformationValue	1.0000
ColorTransformationValueSelector	Offset0
ColorTransformationValue	0.0000
ColorTransformationValueSelector	Offset1
ColorTransformationValue	0.0000
ColorTransformationValueSelector	Offset2
ColorTransformationValue	0.0000
ColorTransformationSelector	RGBtoRGB
ColorTransformationValueSelector	Gain00
BslColorAdjustmentEnable	0
BslColorAdjustmentSelector	Red
BslColorAdjustmentHue	0.000
BslColorAdjustmentSelector	Yellow
BslColorAdjustmentHue	0.000
BslColorAdjustmentSelector	Green
BslColorAdjustmentHue	0.000
BslColorAdjustmentSelector	Cyan
BslColorAdjustmentHue	0.000
BslColorAdjustmentSelector	Blue
BslColorAdjustmentHue	0.000
BslColorAdjustmentSelector	Magenta
BslColorAdjustmentHue	0.000
BslColorAdjustmentSelector	Red
BslColorAdjustmentSelector	Red
BslColorAdjustmentSaturation	1.000
BslColorAdjustmentSelector	Yellow
BslColorAdjustmentSaturation	1.000
BslColorAdjustmentSelector	Green
BslColorAdjustmentSaturation	1.000
BslColorAdjustmentSelector	Cyan
BslColorAdjustmentSaturation	1.000
BslColorAdjustmentSelector	Blue
BslColorAdjustmentSaturation	1.000
BslColorAdjustmentSelector	Magenta
BslColorAdjustmentSaturation	1.000
BslColorAdjustmentSelector	Red
LUTSelector	Luminance
LUTEnable	1
LUTSelector	Luminance
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BslStaticDefectPixelCorrectionMode	Factory
BslLightControlMode	Off
LineSelector	Line1
LineInverter	0
LineSelector	Line2
LineInverter	0
LineSelector	Line3
LineInverter	0
LineSelector	Line1
LineSelector	Line2
BslLineConnection	ConnectionOff
LineSelector	Line3
BslLineConnection	ConnectionOff
LineSelector	Line1
LineSelector	Line1
LineMode	Input
LineSelector	Line2
LineMode	Input
LineSelector	Line3
LineMode	Input
LineSelector	Line1
LineSelector	Line1
BslInputFilterTime	0.00
LineSelector	Line2
BslInputFilterTime	0.00
LineSelector	Line3
BslInputFilterTime	0.00
LineSelector	Line1
LineSelector	Line1
BslInputHoldOffTime	0.00
LineSelector	Line2
BslInputHoldOffTime	0.00
LineSelector	Line3
BslInputHoldOffTime	0.00
LineSelector	Line1
LineSelector	Line2
LineSource	Off
LineSelector	Line3
LineSource	Off
LineSelector	Line1
UserOutputSelector	UserOutput1
UserOutputValue	0
UserOutputSelector	UserOutput2
UserOutputValue	0
UserOutputSelector	UserOutput3
UserOutputValue	0
UserOutputSelector	UserOutput1
CounterSelector	Counter1
CounterEventSource	Off
CounterSelector	Counter2
CounterEventSource	Off
CounterSelector	Counter1
CounterSelector	Counter1
CounterResetSource	Off
CounterSelector	Counter2
CounterResetSource	Off
CounterSelector	Counter1
CounterSelector	Counter1
CounterTriggerSource	Off
CounterSelector	Counter2
CounterTriggerSource	Off
CounterSelector	Counter1
CounterSelector	Counter1
CounterDuration	4294967295
CounterSelector	Counter2
CounterDuration	4294967295
CounterSelector	Counter1
TimerSelector	Timer1
TimerTriggerSource	Off
TimerSelector	Timer2
TimerTriggerSource	Off
TimerSelector	Timer1
TimerSelector	Timer1
TimerDelay	0.00
TimerSelector	Timer2
TimerDelay	0.00
TimerSelector	Timer1
TimerSelector	Timer1
TimerDuration	10.00
TimerSelector	Timer2
TimerDuration	10.00
TimerSelector	Timer1
TimerSelector	Timer1
TimerTriggerArmDelay	0.00
TimerSelector	Timer2
TimerTriggerArmDelay	0.00
TimerSelector	Timer1
ChunkModeActive	0
ChunkSelector	AutoBrightnessStatus
ChunkEnable	0
ChunkSelector	CounterValue
ChunkEnable	0
ChunkSelector	ExposureTime
ChunkEnable	0
ChunkSelector	FrameID
ChunkEnable	0
ChunkSelector	Gain
ChunkEnable	0
ChunkSelector	LineStatusAll
ChunkEnable	0
ChunkSelector	PayloadCRC16
ChunkEnable	0
ChunkSelector	Timestamp
ChunkEnable	0
ChunkSelector	AutoBrightnessStatus
ActionDeviceKey	0
ActionGroupMask	0
ActionGroupKey	0
BslPeriodicSignalSelector	PeriodicSignal1
BslPeriodicSignalPeriod	10000.00
BslPeriodicSignalSelector	PeriodicSignal1
BslPeriodicSignalSelector	PeriodicSignal1
BslPeriodicSignalDelay	0.00
BslPeriodicSignalSelector	PeriodicSignal1
EventSelector	ActionLate
EventNotification	Off
EventSelector	ExposureEnd
EventNotification	Off
EventSelector	FrameBufferOverrun
EventNotification	Off
EventSelector	FrameStart
EventNotification	Off
EventSelector	FrameTriggerMissed
EventNotification	Off
EventSelector	Overrun
EventNotification	Off
EventSelector	TemperatureStatusChanged
EventNotification	Off
EventSelector	Test
EventNotification	On
EventSelector	ActionLate
UserDefinedValueSelector	Value1
UserDefinedValue	0
UserDefinedValueSelector	Value2
UserDefinedValue	0
UserDefinedValueSelector	Value3
UserDefinedValue	0
UserDefinedValueSelector	Value4
UserDefinedValue	0
UserDefinedValueSelector	Value5
UserDefinedValue	0
UserDefinedValueSelector	Value1
DeviceIndicatorMode	Active
GevSCPSPacketSize	1500
GevSCPD	512
GevSCFTD	0
BandwidthReserveMode	Standard
BslPtpServoLockedThreshold	50000

If I change AcquisitionFrameRate to 30.0 fps in features file grabbing works fine without any timeouts:

% python camera_test.py
Name: Basler a2A1920-51gcBAS (40617123), IP: x.x.x.x, Serial: x
Grab started -  a2A1920-51gcBAS
1
2
3
4
5
...
152
153
154
Grab ended

In Pylon Viewer app everything works fine for both 1.0 and 30.0 fps.

Is your camera operational in Basler pylon viewer on your platform

Yes

Hardware setup used

MacBook M2 Pro
Ubiquiti USW Pro 48 POE Switch

Camera(s) used

Basler a2A1920-51gcBAS

Runtime information:

MacOS Tahoe Version 26.0.1 (25A362)

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