4.22 Post-Processors/Tappas

General Discussion
1

I’ve got a raspberry pi 5 and AI Hat+ and I’m working on an object detection project using Hailo 8L - yolov8s.hef and I can’t figure out where to find the compatible post-procressor for version 4.22. Did Hailo stop distributing tappas in the more recent .deb builds. I found a post-processor in 3.11 but it isn’t compatible with yolov8s.hef. Please help.

is there a files i can download called…?
hailo-post-processes_4.22.0_arm64.deb that includes libyolo_hailortpp_post.so

I’ve been stalled on this for a long time and can’t find any documentation that helps.

2

additional information…

SDK bits on the Pi

dpkg -l | grep -iE ‘hailort|hailo-.*tappas|post.*process’ | awk ‘{print $2, $3}’
gst-inspect-1.0 hailofilter | sed -n ‘1,12p’
gst-inspect-1.0 hailotools | sed -n ‘1,20p’

The NMS vstream name from your HEFs

hailortcli parse-hef /home/traffic/traffic/models/yolov5s.hef | grep -i ‘nms’ -A2
hailortcli parse-hef /home/traffic/traffic/models/yolov8s.hef | grep -i ‘nms’ -A2

Who owns the currently-installed adapter (the old one)

dpkg -S /usr/lib/aarch64-linux-gnu/hailo/tappas/post_processes/libyolo_hailortpp_post.so

3

I found this previous comment but there is a problem…. The Tappas-Core 5 build that is in the software downloads area is amd not arm64.

What is there…
hailo-tappas-core_5.0.0_amd64.deb
What I need…
hailo-tappas-core_5.0.0_arm64.deb

Hi ,

To upgrade to version 4.22, please follow these steps:

  1. First, remove your current installation using the removal guide posted above!

  2. Then install the following components in order:

    • Driver 4.22

    • HailoRT 4.22

    • PyHailoRT 4.22

    • Tappas-core 5.0.0

    • Tappas-core Python 5.0.0

Let me know if you need any clarification on the installation or removal steps!

4

Now I’m at a complete loss. are there no arm64 prebuilt postprocessors available for 4.22? Does 4.22 just not work for Raspberry pi?

I’ve attempted every combination of installations and .hef files and I always get “yolov8s/yolov8_nms_postprocess is not an NMS type”.

Any help would be appreciated.

5

Hi.

There were some changes in HailoRT and the post process include dependencies and we will release an updated package soon in collaboration with RPi.

Meanwhile I suggest you to use our official version which is tested and its installation flow is handled by RPi (apt install hailo-all).
Don’t worry you are not missing anything :sweat_smile: . Your best bet is to always use the latest official supported package by RPi.

6

have you tried with

’libyolo_hailortpp_postprocess.so’

it is compatible with all yolov8 versions

7

thank you. I’m still struggling to get this working. The problem is that it seem the official raspberry pi page for the AI hat+ seems to support up to 4.19.

https://www.raspberrypi.com/documentation/computers/ai.html

but the model zoo for Hailo8L only appears to supply V2 .hef files. The problem is that 4.19 need version 1 hef files but i can’t find a source for those in the model zoo.

8

Ideally i need a copy of YOLOv5s.hef in version 1

9

I think I’ve found the main issue. From what I tell, the newest version of the complete AI software stack that will run on the Pi 5 and AI Hat+ is 4.19. What I have learned is that the .hef files in the model zoo on github are all in a version 2 format. I’ve come to understand that the software, 4.19 and older are require version 1 .hef files to work properly. (for a long time I didn’t realize there were two different versions of .hef files.

Digging deeper I was not able to find any precompiled version 1 .hef files, but it is possible to compile them on the correct PC hardware running a linux docker. I happen to have hardware that can run it, but my old PC is struggling.

Unfortunately I have not found a way to compile .hef files on Apple silicon. (Which is my primary machine)

I currently have my system slogging away in docker, trying to compile, but it has been going for several hours and I have no idea how long it could take.

10

I have compiled the Hailo 4.22 and Tappas 5.0 for the Rpi5 with Ubuntu 24.04 and things seem to work ok for what I tried;-) So, there is no big problem with running that on the Rpi5/ARM64. I don’t know, why the official Raspberry Pi OS is stuck with the old version.

– Marco

11

I’m running the 4.22 version without problems on my rpi 5 plus hailo hat+

12

Hey All,

You can use the dev branch in the hailo-apps-infra repo , This has the 4.22 post process , will update to main and do a release next Sunday!

1 Like