index out of range error (might be related to #47)

[gaijinsr]

Hi,
running on Ubuntu 18.04, without jackd running (audio-reactive-led-strip works great like this, btw), I get

Systematic-LEDs/python$ python3 main.py 
Could not find settings.ini
No user colours found
No user gradients found
QApplication: invalid style override passed, ignoring it.
ALSA lib pcm_dmix.c:1052:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_route.c:867:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_dmix.c:1052:(snd_pcm_dmix_open) unable to open slave
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
Traceback (most recent call last):
  File "main.py", line 2046, in <module>
    microphone = Microphone(microphone_update)
  File "main.py", line 847, in __init__
    self.setDevice(self.default_device_id)
  File "main.py", line 858, in setDevice
    self.device_id = self.devices[device_id]["index"]
IndexError: list index out of range

With jackd running, I get

Systematic-LEDs/python$ python3 main.py 
Could not find settings.ini
No user colours found
No user gradients found
QApplication: invalid style override passed, ignoring it.
ALSA lib pcm_dsnoop.c:618:(snd_pcm_dsnoop_open) unable to open slave
ALSA lib pcm_dmix.c:1052:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_dmix.c:1052:(snd_pcm_dmix_open) unable to open slave
Cannot lock down 82280346 byte memory area (Cannot allocate memory)
Traceback (most recent call last):
  File "main.py", line 2046, in <module>
    microphone = Microphone(microphone_update)
  File "main.py", line 842, in __init__
    device_info = py_audio.get_device_info_by_host_api_device_index(0,i)
  File "/usr/lib/python3/dist-packages/pyaudio.py", line 852, in get_device_info_by_host_api_device_index
    host_api_device_index)
OSError: [Errno -9996] Invalid device

and the window freezes and uses 100% CPU. Any idea what is happening here?

By the way, I patched audio-reactive-led-strip to send output in the format of Systematic-LEDs
because I have a WS2811 strip and some WS2801 strips that are not supported by the libraries
used in the ESP8266 code in audio-reactive-led-strip. Tell me if you are interested in the code
(I did not post it because I thought you consider audio-reactive-led-strip dead.)

[kennerblick]

i have the same error, with clean ubuntu 16.04, install all dependencies, clean git clone, same error

[lpearl]

@gaijinsr I got it working on my pi3, I was getting the same error as you and I made a few changes to make it work for me (My setup does differ as I'm using rasparian and shairport-sync as an input).
add after line 257 in main.py

for i in range(len(self.devices)):
    if self.devices[i]['index'] == device_id:
        device_id = i
        break

let me know if that works.

[gaijinsr]

@lpearl: Great, I'd like to try this, but are you sure about the line number? In my main.py, c.f.
https://github.com/not-matt/Systematic-LEDs/blob/master/python/main.py
the code around line 257 is about updating the LED strip... Can you post the context of your patch?

[lpearl]

@gaijinsr My bad I meant after 857. From what I could tell when looking at the code it's trying to pick a device on the list of devices with an index of x (x being whatever index the device chosen is). x is in a list and instead of picking the position the device is in (in the list), it asks for the index at a position of the index which makes no sense. so adding that code should fix it. There is definitely a more efficient way of fixing it but I don't want to delete any of the code that's already there.

[andrealbers]

@lpearl Didn't work for me. Any advice?

 def setDevice(self, device_id):
        # set device to stream from by the id of the device
        if not device_id in range(0,self.numdevices):
            raise ValueError("No device with id {}".format(device_id))
        for i in range(len(self.devices)):
            if self.devices[i]['index'] == device_id:
                device_id = i
                break
        self.device_id = self.devices[device_id]["index"]

[lpearl]

@gaijinsr What error did you get? How are you giving the devices an audio input? What system are you running Ubuntu on?

[gaijinsr]

@lpearl Great, this worked for me!!
I am running Bionic on several different x86 machines, the result was always the same.
BTW: When I copy the directory with the patched file from one machine to another, the program crashes due to the different audio device structure. Deleting settings.ini helps.

[richyxi]

I change the code and I got this Traceback (most recent call last): File "main.py", line 831, in <module> class Microphone(): File "main.py", line 858, in Microphone for i in range(len(self.devices)): NameError: name 'self' is not defined

…

On Wed, Jan 30, 2019, 11:53 AM lpearl ***@***.*** wrote: @gaijinsr <https://github.com/gaijinsr> What error did you get? How are you giving the devices an audio input? What system are you running Ubuntu on? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#53 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/As6sG4WZFe_DCEFQL4BlRG3NO6pN4Lwdks5vIdwngaJpZM4YvsVV> .