hailopython pipeline aborted

General
1

Using a simple pipeline to exercise/test hailopython fails. Using the following pipeline

gst-launch-1.0 videotestsrc ! hailopython module=b.py ! autovideosink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Fatal Python error: init_threadstate: thread state already initialized
Python runtime state: initialized

Thread 0x00007fff3bddcbc0 (most recent call first):
  <no Python frame>
Aborted
(venv_hailo_rpi5_examples) root@percy:/home/pi/exp# gst-launch-1.0 videotestsrc ! hailopython module=b.py ! autovideosink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Fatal Python error: init_threadstate: thread state already initialized
Python runtime state: initialized

Thread 0x00007ffeefd30bc0 (most recent call first):
  <no Python frame>
Aborted

b.py is a simple test python script

import hailo
import gi
gi.require_version('Gst', '1.0')
from gi.repository import Gst

def run(buffer: Gst.Buffer, roi: hailo.HailoROI):
        print("My first Python postprocess!")
2

@sanjoyg the run function shouldn’t have an roi argument. Not sure if this is the cause of the error you are seeing, but please give it a try without it.
Also make sure to add a return Gst.FlowReturn.OK

3

Same result, modified code to be

mport hailo
import gi
gi.require_version('Gst', '1.0')
from gi.repository import Gst

#def run(buffer: Gst.Buffer, roi: hailo.HailoROI):
#def run(buffer: Gst.Buffer):
def run(buffer):
        print("My first Python postprocess!")
        return Gst.FlowReturn.OK

Output

gst-launch-1.0 videotestsrc ! hailopython module=b.py ! autovideosink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Fatal Python error: init_threadstate: thread state already initialized
Python runtime state: initialized

Thread 0x00007fffa05f0bc0 (most recent call first):
  <no Python frame>
Aborted
4

A paste error, read the first line as import hailo not “mport hailo”

5

@sanjoyg thanks for trying it out.

We reproduced the issue and we are checking what could be causing it, we’ll keep you updated

6

@sanjoyg we have noticed that the issue only happens when running the element using gst-launch.

While we work on a solution, you can add the hailopython to a GStreamer pipeline with Python on top.

For example, on the detection basic pipeline, you can add it as follows:

hailo-rpi5-examples/basic_pipelines/detection.py
hailo-rpi5-examples/basic_pipelines/detection.py1105×478 153 KB

Thank you for reporting the issue to us, we will update here once it is solved.

7

jkrpi5@jk:~/tappas-3.29.1/apps/h8/gstreamer/general/multistream_detection $ GST_DEBUG=3 gst-launch-1.0 -v videotestsrc ! hailopython module=/home/jkrpi5/my_module.py qos=false ! autovideosink
Setting pipeline to PAUSED …
0:00:00.048556180 4409 0x555610774470 WARN xcontext xvcontext.c:546:gst_xvcontext_check_xshm_calls: MIT-SHM extension check failed at XShmAttach. Not using shared memory.
0:00:00.074478352 4409 0x555610774470 WARN xcontext xvcontext.c:546:gst_xvcontext_check_xshm_calls: MIT-SHM extension check failed at XShmAttach. Not using shared memory.
Pipeline is PREROLLING …
0:00:00.253201752 4409 0x5556104a7000 FIXME default gstutils.c:4031:gst_pad_create_stream_id_internal:videotestsrc0:src Creating random stream-id, consider implementing a deterministic way of creating a stream-id
Fatal Python error: init_threadstate: thread state already initialized
Python runtime state: initialized/GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0.GstPad:src: caps = video/x-raw, format=(string)I420, width=(int)320, height=(int)240, framerate=(fraction)30/1, multiview-mode=(string)mono, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive

Thread 0x00007ffec34b8c00 (most recent call first):

Aborted
Can you please help me out

8

It’s pretty old thread, is there any progress? I’m also getting:

Fatal Python error: init_threadstate: thread state already initialized
Python runtime state: initialized

Thread 0x00007ffecbbd9c40 (most recent call first):
  <no Python frame>
Aborted

Using the code from the Python Module Template

9

Hi, the hailopython element should work if the pipeline is initiated from python. I.e. not from bash. See examples in our examples GitHub GitHub - hailo-ai/hailo-rpi5-examples

Please consider using our examples and adding you python code using a user callback. This works and tested. The hailopython plugin might be deprecated soon.

1 Like
10

@giladn

Sorry for the inconvenience, could you please clarify how to do this, why do you say that the hailopython plugin might be deprecated soon? What do you advise to use to avoid my app becoming obsolete?

11

See our examples in GitHub - hailo-ai/hailo-apps-infra.
You can move your python code from hailopython to a callback. See documentation for examples and instructions.

1 Like