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MycroftAI
Raspberry Pi 4 Buster Not Working with Binary Installation of Mycroft-Precise
Useful Info
OS: Raspbian Buster
Python: Python3.7
Mycroft-Precise Version: 0.3.0
Issue:
Hello Mycroft Precise Team (e.g. @MatthewScholefield)!
I have been trying to get precise-runner working with my Raspberry Pi 4 running Raspbian Buster.
After creating my own model on a Ubuntu Linux machine, I tried to get it Mycroft-precise to use it on the Pi (here is my model and its associated params. If anyone wants to test out the model, the wake word is "Automaton". I followed the steps to train my model and it yielded a 98.5% accuracy so I feel like it is pretty robust.)
Once I transferred everything over to my Pi, I ran into a solid wall where I spent upwards of three hours debugging things to no avail. I ended up trying to build from source as well but still no luck.
Here is the error I consistently get:
Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 924
Segmentation fault
And this was after hours of tampering with my set-up. What I think is happening is something is happening with PyAudio but I know not what. I tried this also on Python3.5 on my Ubuntu Linux Machine and I am getting the same error.
Any thoughts about how to work around this? I would appreciate any thoughts here as I very much wish to use this software! Let me know if I can provide any more assistance
Steps to Reproduce
-
Follow Source Install instructions
-
Create Samply Python Program
-
sudo python3 example.pywith my model now in place as well as executing this from the virtual environment.
git clone https://github.com/mycroftai/mycroft-precise
cd mycroft-precise
Additional Info:
Here is my latest .asoundrc file that I created in my home directory:
.asoundrc
pcm.!default {
type asym
playback.pcm {
type plug
slave.pcm "hw:0,0"
}
capture.pcm {
type plug
slave.pcm "hw:1,0"
}
}
Here is my alsa.conf file in my /usr/share/alsa/ directory:
alsa.conf
#
# ALSA library configuration file
#
# pre-load the configuration files
@hooks [
{
func load
files [
"/etc/alsa/conf.d"
"/etc/asound.conf"
"~/.asoundrc"
]
errors false
}
]
# load card-specific configuration files (on request)
cards.@hooks [
{
func load
files [
{
@func concat
strings [
{ @func datadir }
"/cards/aliases.conf"
]
}
]
}
{
func load_for_all_cards
files [
{
@func concat
strings [
{ @func datadir }
"/cards/"
{ @func private_string }
".conf"
]
}
]
errors false
}
]
#
# defaults
#
# show all name hints also for definitions without hint {} section
defaults.namehint.showall on
# show just basic name hints
defaults.namehint.basic on
# show extended name hints
defaults.namehint.extended on
#
###############################
# I CHANGED THESE TWO LINES TO
# DETECT MY CARD AT LOCATION 1
# INSTEAD OF LOCATION 0
# ~ TheCedarPrince
###############################
defaults.ctl.card 1
defaults.pcm.card 1
###############################
defaults.pcm.device 0
defaults.pcm.subdevice -1
defaults.pcm.nonblock 1
defaults.pcm.compat 0
defaults.pcm.minperiodtime 5000 # in us
defaults.pcm.ipc_key 5678293
defaults.pcm.ipc_gid audio
defaults.pcm.ipc_perm 0660
defaults.pcm.dmix.max_periods 0
defaults.pcm.dmix.rate 48000
defaults.pcm.dmix.format "unchanged"
defaults.pcm.dmix.card defaults.pcm.card
defaults.pcm.dmix.device defaults.pcm.device
defaults.pcm.dsnoop.card defaults.pcm.card
defaults.pcm.dsnoop.device defaults.pcm.device
defaults.pcm.front.card defaults.pcm.card
defaults.pcm.front.device defaults.pcm.device
defaults.pcm.rear.card defaults.pcm.card
defaults.pcm.rear.device defaults.pcm.device
defaults.pcm.center_lfe.card defaults.pcm.card
defaults.pcm.center_lfe.device defaults.pcm.device
defaults.pcm.side.card defaults.pcm.card
defaults.pcm.side.device defaults.pcm.device
defaults.pcm.surround21.card defaults.pcm.card
defaults.pcm.surround21.device defaults.pcm.device
defaults.pcm.surround40.card defaults.pcm.card
defaults.pcm.surround40.device defaults.pcm.device
defaults.pcm.surround41.card defaults.pcm.card
defaults.pcm.surround41.device defaults.pcm.device
defaults.pcm.surround50.card defaults.pcm.card
defaults.pcm.surround50.device defaults.pcm.device
defaults.pcm.surround51.card defaults.pcm.card
defaults.pcm.surround51.device defaults.pcm.device
defaults.pcm.surround71.card defaults.pcm.card
defaults.pcm.surround71.device defaults.pcm.device
defaults.pcm.iec958.card defaults.pcm.card
defaults.pcm.iec958.device defaults.pcm.device
defaults.pcm.modem.card defaults.pcm.card
defaults.pcm.modem.device defaults.pcm.device
# truncate files via file or tee PCM
defaults.pcm.file_format "raw"
defaults.pcm.file_truncate true
defaults.rawmidi.card 0
defaults.rawmidi.device 0
defaults.rawmidi.subdevice -1
defaults.hwdep.card 0
defaults.hwdep.device 0
defaults.timer.class 2
defaults.timer.sclass 0
defaults.timer.card 0
defaults.timer.device 0
defaults.timer.subdevice 0
#
# PCM interface
#
# redirect to load-on-demand extended pcm definitions
pcm.cards cards.pcm
###########################################
# I CHANGED THIS SECTION FROM THE DEFAULT
# IT GOT RID OF A BUNCH OF ERRORS!
# ~TheCedarPrince
###########################################
pcm.default cards.pcm.default
pcm.sysdefault cards.pcm.default
pcm.front cards.pcm.default
pcm.rear cards.pcm.default
pcm.center_lfe cards.pcm.default
pcm.side cards.pcm.default
pcm.surround21 cards.pcm.default
pcm.surround40 cards.pcm.default
pcm.surround41 cards.pcm.default
pcm.surround50 cards.pcm.default
pcm.surround51 cards.pcm.default
pcm.surround71 cards.pcm.default
pcm.iec958 cards.pcm.default
pcm.spdif iec958
pcm.hdmi cards.pcm.default
pcm.dmix cards.pcm.default
pcm.dsnoop cards.pcm.default
pcm.modem cards.pcm.default
pcm.phoneline cards.pcm.default
############################################
pcm.hw {
@args [ CARD DEV SUBDEV ]
@args.CARD {
type string
default {
@func getenv
vars [
ALSA_PCM_CARD
ALSA_CARD
]
default {
@func refer
name defaults.pcm.card
}
}
}
@args.DEV {
type integer
default {
@func igetenv
vars [
ALSA_PCM_DEVICE
]
default {
@func refer
name defaults.pcm.device
}
}
}
@args.SUBDEV {
type integer
default {
@func refer
name defaults.pcm.subdevice
}
}
type hw
card $CARD
device $DEV
subdevice $SUBDEV
hint {
show {
@func refer
name defaults.namehint.extended
}
description "Direct hardware device without any conversions"
}
}
pcm.plughw {
@args [ CARD DEV SUBDEV ]
@args.CARD {
type string
default {
@func getenv
vars [
ALSA_PCM_CARD
ALSA_CARD
]
default {
@func refer
name defaults.pcm.card
}
}
}
@args.DEV {
type integer
default {
@func igetenv
vars [
ALSA_PCM_DEVICE
]
default {
@func refer
name defaults.pcm.device
}
}
}
@args.SUBDEV {
type integer
default {
@func refer
name defaults.pcm.subdevice
}
}
type plug
slave.pcm {
type hw
card $CARD
device $DEV
subdevice $SUBDEV
}
hint {
show {
@func refer
name defaults.namehint.extended
}
description "Hardware device with all software conversions"
}
}
pcm.plug {
@args [ SLAVE ]
@args.SLAVE {
type string
}
type plug
slave.pcm $SLAVE
}
pcm.shm {
@args [ SOCKET PCM ]
@args.SOCKET {
type string
}
@args.PCM {
type string
}
type shm
server $SOCKET
pcm $PCM
}
pcm.tee {
@args [ SLAVE FILE FORMAT ]
@args.SLAVE {
type string
}
@args.FILE {
type string
}
@args.FORMAT {
type string
default {
@func refer
name defaults.pcm.file_format
}
}
type file
slave.pcm $SLAVE
file $FILE
format $FORMAT
truncate {
@func refer
name defaults.pcm.file_truncate
}
}
pcm.file {
@args [ FILE FORMAT ]
@args.FILE {
type string
}
@args.FORMAT {
type string
default {
@func refer
name defaults.pcm.file_format
}
}
type file
slave.pcm null
file $FILE
format $FORMAT
truncate {
@func refer
name defaults.pcm.file_truncate
}
}
pcm.null {
type null
hint {
show {
@func refer
name defaults.namehint.basic
}
description "Discard all samples (playback) or generate zero samples (capture)"
}
}
#
# Control interface
#
ctl.sysdefault {
type hw
card {
@func getenv
vars [
ALSA_CTL_CARD
ALSA_CARD
]
default {
@func refer
name defaults.ctl.card
}
}
hint.description "Default control device"
}
ctl.default ctl.sysdefault
ctl.hw {
@args [ CARD ]
@args.CARD {
type string
default {
@func getenv
vars [
ALSA_CTL_CARD
ALSA_CARD
]
default {
@func refer
name defaults.ctl.card
}
}
}
type hw
card $CARD
hint.description "Direct control device"
}
ctl.shm {
@args [ SOCKET CTL ]
@args.SOCKET {
type string
}
@args.CTL {
type string
}
type shm
server $SOCKET
ctl $CTL
}
#
# RawMidi interface
#
rawmidi.default {
type hw
card {
@func getenv
vars [
ALSA_RAWMIDI_CARD
ALSA_CARD
]
default {
@func refer
name defaults.rawmidi.card
}
}
device {
@func igetenv
vars [
ALSA_RAWMIDI_DEVICE
]
default {
@func refer
name defaults.rawmidi.device
}
}
hint.description "Default raw MIDI device"
}
rawmidi.hw {
@args [ CARD DEV SUBDEV ]
@args.CARD {
type string
default {
@func getenv
vars [
ALSA_RAWMIDI_CARD
ALSA_CARD
]
default {
@func refer
name defaults.rawmidi.card
}
}
}
@args.DEV {
type integer
default {
@func igetenv
vars [
ALSA_RAWMIDI_DEVICE
]
default {
@func refer
name defaults.rawmidi.device
}
}
}
@args.SUBDEV {
type integer
default -1
}
type hw
card $CARD
device $DEV
subdevice $SUBDEV
hint {
description "Direct rawmidi driver device"
device $DEV
}
}
rawmidi.virtual {
@args [ MERGE ]
@args.MERGE {
type string
default 1
}
type virtual
merge $MERGE
}
#
# Sequencer interface
#
seq.default {
type hw
hint.description "Default sequencer device"
}
seq.hw {
type hw
}
#
# HwDep interface
#
hwdep.default {
type hw
card {
@func getenv
vars [
ALSA_HWDEP_CARD
ALSA_CARD
]
default {
@func refer
name defaults.hwdep.card
}
}
device {
@func igetenv
vars [
ALSA_HWDEP_DEVICE
]
default {
@func refer
name defaults.hwdep.device
}
}
hint.description "Default hardware dependent device"
}
hwdep.hw {
@args [ CARD DEV ]
@args.CARD {
type string
default {
@func getenv
vars [
ALSA_HWDEP_CARD
ALSA_CARD
]
default {
@func refer
name defaults.hwdep.card
}
}
}
@args.DEV {
type integer
default {
@func igetenv
vars [
ALSA_HWDEP_DEVICE
]
default {
@func refer
name defaults.hwdep.device
}
}
}
type hw
card $CARD
device $DEV
hint {
description "Direct hardware dependent device"
device $DEV
}
}
#
# Timer interface
#
timer_query.default {
type hw
}
timer_query.hw {
type hw
}
timer.default {
type hw
class {
@func refer
name defaults.timer.class
}
sclass {
@func refer
name defaults.timer.sclass
}
card {
@func refer
name defaults.timer.card
}
device {
@func refer
name defaults.timer.device
}
subdevice {
@func refer
name defaults.timer.subdevice
}
hint.description "Default timer device"
}
timer.hw {
@args [ CLASS SCLASS CARD DEV SUBDEV ]
@args.CLASS {
type integer
default {
@func refer
name defaults.timer.class
}
}
@args.SCLASS {
type integer
default {
@func refer
name defaults.timer.sclass
}
}
@args.CARD {
type string
default {
@func refer
name defaults.timer.card
}
}
@args.DEV {
type integer
default {
@func refer
name defaults.timer.device
}
}
@args.SUBDEV {
type integer
default {
@func refer
name defaults.timer.subdevice
}
}
type hw
class $CLASS
sclass $SCLASS
card $CARD
device $DEV
subdevice $SUBDEV
hint {
description "Direct timer device"
device $DEV
}
}
Here is the output of arecord -l:
**** List of CAPTURE Hardware Devices ****
card 1: Device [USB PnP Audio Device], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
Here is the output of my Python virtual environment:
Package Version Location
-------------------- ------- -------------------------------
absl-py 0.7.1
astor 0.7.1
attrs 19.1.0
bbopt 1.1.1
bson 0.5.8
cloudpickle 1.2.2
cycler 0.10.0
decorator 4.4.0
fitipy 0.1.2
future 0.17.1
gast 0.2.2
google-pasta 0.1.7
grpcio 1.19.0
h5py 2.9.0
hyperopt 0.1.2
joblib 0.14.0
Keras 2.2.4
Keras-Applications 1.0.8
Keras-Preprocessing 1.0.9
kiwisolver 1.0.1
Markdown 3.1
matplotlib 3.0.3
mock 2.0.0
mycroft-precise 0.3.0 /home/pi/mycroft-precise
networkx 1.11
numpy 1.16.2
pbr 5.1.3
pip 19.3.1
pocketsphinx 0.1.15
portalocker 1.4.0
precise-runner 0.3.1 /home/pi/mycroft-precise/runner
prettyparse 0.1.4
protobuf 3.7.1
pyache 0.1.0
PyAudio 0.2.11
pymongo 3.7.2
pyparsing 2.3.1
python-dateutil 2.8.0
PyYAML 5.1
scikit-learn 0.20.3
scikit-optimize 0.5.2
scipy 1.2.1
setuptools 41.4.0
six 1.12.0
sonopy 0.1.2
speechpy-fast 2.4
tensorboard 1.13.1
tensorflow 1.13.1
tensorflow-estimator 1.14.0
termcolor 1.1.0
tqdm 4.31.1
typing 3.6.6
wavio 0.0.4
Werkzeug 0.15.1
wheel 0.33.6
wrapt 1.11.2
Hello,
For your information, I also try precise on raspberry pi 4 with buster lite.
I have also the same warning message as your's :
Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 924
But I don't have "Segmentation fault".
All my test are described in issue #94.
Maybe it will help you.
Hey @tdy91,
I looked at your write-up - great work there! I will try out some of your fixes.
Regarding that particular error:
Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 924
How did you solve it? Do you know where the problem was coming from?
Yours, TheCedarPrince
Have you attempted to use the preconfigured Buster/Mycroft image for Raspberry Pi? I'm curious if it shows any problem.
The most recent (aka "unstable") Picroft image is built on Buster Lite. See: https://mycroft.ai/to/picroft-unstable
Hey @TheCedarPince,
Regarding 'src/hostapi/alsa/pa_linux_alsa.c', line: 924 specific error, i don't try to solve it because in my tests it does not stop working. In your case, the "Segmentation fault" which follows seems to stop you. No idea why, sorry.
Hey @penrods,
I don't try Buster/Mycroft image for Raspberry Pi. Just spent few hours to make working what i explain in issue #94 !
Yours, tdy91
Alright - update @tdy91
I have not gotten a chance to try all your different suggested methods but am now getting this error:
Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 924
Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 924
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.front.0:CARD=0'
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM front
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround51.0:CARD=0'
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround21
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround51.0:CARD=0'
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround21
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround40.0:CARD=0'
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround40
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround51.0:CARD=0'
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround41
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround51.0:CARD=0'
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround50
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround51.0:CARD=0'
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround51
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround71.0:CARD=0'
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround71
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.iec958.0:CARD=0,AES0=4,AES1=130,AES2=0,AES3=2'
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM iec958
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.iec958.0:CARD=0,AES0=4,AES1=130,AES2=0,AES3=2'
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM spdif
ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.iec958.0:CARD=0,AES0=4,AES1=130,AES2=0,AES3=2'
ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM spdif
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline
ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline
[1095] Failed to execute script stream
Traceback (most recent call last):
File "precise/scripts/stream.py", line 52, in <module>
File "precise/scripts/stream.py", line 40, in main
File "precise/network_runner.py", line 79, in __init__
File "precise/network_runner.py", line 30, in __init__
File "precise/network_runner.py", line 42, in load_graph
File "google/protobuf/message.py", line 185, in ParseFromString
File "google/protobuf/internal/python_message.py", line 1083, in MergeFromString
File "google/protobuf/internal/python_message.py", line 1120, in InternalParse
File "google/protobuf/internal/decoder.py", line 612, in DecodeRepeatedField
File "google/protobuf/internal/python_message.py", line 1120, in InternalParse
File "google/protobuf/internal/decoder.py", line 501, in DecodeField
google.protobuf.message.DecodeError: Truncated string.
Exception in thread Thread-1:
Traceback (most recent call last):
File "/usr/local/lib/python3.6/threading.py", line 916, in _bootstrap_inner
self.run()
File "/usr/local/lib/python3.6/threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "/home/pi/precise/runner/precise_runner/runner.py", line 236, in _handle_predictions
prob = self.engine.get_prediction(chunk)
File "/home/pi/precise/runner/precise_runner/runner.py", line 67, in get_prediction
return float(self.proc.stdout.readline())
ValueError: could not convert string to float:
I have not gotten it figured out just yet but when I have more time I will make sure to go through your guide. The thing I am trying to do is avoid using a virtual-environment but that may not be possible...
I will keep you posted! Any thoughts so far?
Yours, TheCedarPrince
Hey @TheCedarPince,
I don't understand what you mean saying 'I am trying to do is avoid using a virtual-environment but that may not be possible...' because I don't know exactly your installation (which virtual environment, which relationship with raspberry pi 4 ?).
For your information, while my tests I do everything on the Raspberry Pi 4 + Buster lite (installation and model creation), nothing on another machine or virtual machine.
In your last error log, i don't understand too where, 'precise/scripts/stream.py' come from, because following my tests I have no stream.py file, either precise/scripts/engine.py in case of 'source install', either precise-engine_0.3.0_armv7l/precise-engine in case of 'binary install'. But it does probably not matter.
This said, I had this kind of error ending with 'ValueError: could not convert string to float:' when precise engine script does'nt find or understand model *.pb or *.pb.params for instance.
In your case, I note that you seems to create your model on an Ubuntu Linux Machine (maybe the virtual environnment you are talking about) and i note also at the end ogf your log error 'google.protobuf.message.DecodeError: Truncated string' which make me think that your model file *.pb *.pb.params has been probably created on Ubuntu with a more recent version of tensor tensorflow and is not understand by tensorboard V1.13.1 which must be used with current precise repository.
From your error message, to verify this hypothesis and qualify your raspberry pi 4 installation, i think you can just download hey-mycroft.tar.gz from precise-data repository https://github.com/MycroftAI/precise-data/tree/models/hey-mycroft.tar.gz Then replace your model with hey-mycroft.pb and hey-mycroft.pb.params which are compatible with tensorboard V1.13.1 and works rather not bad.
If it works, you will just to have train your own model on the raspberry pi 4 itself or solve the problem otherwise.
Yours, tdy91
Hey @tdy91 !
I went back through your instructions and I actually got things working! I am not going to close this issue yet as I discovered a lot of fixes that need to be incorporated into the documentation. I am going to do a write up for anyone else who has the same issues.
There were some things in your instructions that were missing so in the write-up here, I will include the missing steps.
Moreover, @krisgesling I should have this ready for reference in MycroftAI/documentation#139. Will let you know when this is ready to go!
Thanks all! TheCedarPrince