Zero sequence expected for first frame error on Rpi4

[tmsd2001]

OS: Linux camerapi8 5.15.61-v8+ #1579 SMP PREEMPT Fri Aug 26 11:16:44 BST 2022 aarch64 GNU/Linux

libcamera:

[1:17:14.018313530] [15880]  INFO Camera camera_manager.cpp:293 libcamera v0.0.0+3865-3fad116f
[1:17:14.032367040] [15881]  INFO RPI raspberrypi.cpp:1374 Registered camera /base/soc/i2c0mux/i2c@1/ov5647@36 to Unicam device /dev/media4 and ISP device /dev/media2
[1:17:14.033062467] [15880]  INFO Camera camera.cpp:1035 configuring streams: (0) 1296x972-YUV420
[1:17:14.033441180] [15881]  INFO RPI raspberrypi.cpp:761 Sensor: /base/soc/i2c0mux/i2c@1/ov5647@36 - Selected sensor format: 1296x972-SGBRG10_1X10 - Selected unicam format: 1296x972-pGAA

Error:

Stream configuration adjusted
[0:34:20.004970168] [13509]  INFO Camera camera.cpp:1035 configuring streams: (0) 2592x1944-YUV420 (1) 2592x1944-SGRBG10_CSI2P
[0:34:20.005919105] [13510]  INFO RPI raspberrypi.cpp:761 Sensor: /base/soc/i2c0mux/i2c@1/ov5647@36 - Selected sensor format: 2592x1944-SGRBG10_1X10 - Selected unicam format: 2592x1944-pgAA
TfStage: no low resolution stream
TfStage: Main stream is 2592x1944
 detected
[0:34:20.250307291] [13510]  WARN V4L2 v4l2_videodevice.cpp:1803 /dev/video0[15:cap]: Zero sequence expected for first frame (got 1)

App: libcamera-apps / libcamera-detect The program gets stuck at this point, but hasn't crashed.

[kbingham]

That last warning about zero sequence can be ignored. Perhaps we should find a way to fix it in the kernels so it doesn't appear, but it's not harmful in this instance. In fact Perhaps it could even be lowered to a debug print.

As to being stuck, If you are using libcamera-apps, please report this issue to them. Raspberry Pi develop the libcamera-apps independently of the libcamera project.

https://github.com/raspberrypi/libcamera-apps

[kbingham]

Are there still any topics to consider in this issue?

I've prepared and sent a patch to lower the log level of this print to hopefully reduce concern about it in the future. https://patchwork.libcamera.org/patch/17611/

[sparatko242]

well, this is bit old thread so maybe I should look also somewhere else, but trying to find answers

I have python program which is sending image over mqtt but also can save image to disk I am using pizerow with original picamera, did install python3-picamera2 I did check, everything is updated

shortly my program doing these steps

 from picamera2 import Picamera2

object init, as you can see that I am saving mqtt config to separate variable to quick used later

self.picam2 = Picamera2()
self.mqtt_config = self.picam2.create_still_configuration(main={"size": (800, 600)})
self.picam2.configure(self.picam2.create_still_configuration())

here is saving method, this one is working fine

def save_photo(self):
    file_name = self.create_file_name()
    self.picam2.capture_file(file_name)

and here is send method, but time to time this one hang on second line "switch_mode_and_capture"

def send(self, client):
    data = io.BytesIO()
    self.picam2.switch_mode_and_capture_file(self.mqtt_config, data, format='jpeg')
    client.publish(self.getTopic(), data.getvalue())
    data.close()

here is output from system log when is hang on

  INFO Camera camera.cpp:1033 configuring streams: (0) 800x600-BGR888 (1) 1296x972-SGBRG10_CSI2P
  INFO RPI vc4.cpp:565 Sensor: /base/soc/i2c0mux/i2c@1/ov5647@36 - Selected sensor format: 1296x972-SGBRG10_1X10 - Selected unicam format: 1296x972-pGAA
  INFO V4L2 v4l2_videodevice.cpp:1820 /dev/video0[20:cap]: Zero sequence expected for first frame (got 1)

othewise looks like this:

INFO Camera camera.cpp:1033 configuring streams: (0) 800x600-BGR888 (1) 1296x972-SGBRG10_CSI2P
INFO RPI vc4.cpp:565 Sensor: /base/soc/i2c0mux/i2c@1/ov5647@36 - Selected sensor format: 1296x972-SGBRG10_1X10 - Selected unicam format: 1296x972-pGAA
INFO Camera camera.cpp:1033 configuring streams: (0) 2592x1944-BGR888 (1) 2592x1944-SGBRG10_CSI2P
INFO RPI vc4.cpp:565 Sensor: /base/soc/i2c0mux/i2c@1/ov5647@36 - Selected sensor format: 2592x1944-SGBRG10_1X10 - Selected unicam format: 2592x1944-pGAA

what do you think? what could be problem? should I change my program? thanks

[kbingham]

If you're having issues with picamera2, please report it there. https://github.com//raspberrypi/picamera2