Qt application oniMX8 does not recognize USB microphone as audio input device
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Hello, I am currently working with an Qt application on an iMX8 board using an yocto image and kernel version 5.15. I want to use a small USB microphone for audio input, however when using QAudioDeviceInfo to list my devices, the usb microphone does not seem to appear on board. However, if I run the same application on my pc the microphone appears under the name:
Device name: "alsa_input.usb-C-Media_Electronics_Inc._USB_PnP_Sound_Device-00.analog-mono"
Supported sample rates: (8000, 11025, 22050, 44100, 48000)
Supported channel counts: (1, 2, 4, 6, 8)
Supported sample sizes: (8, 16, 24, 32)Using the arecord -l command on the board the microphone is recognized and I can sucessfuly record audio with it, only Qt does not recognize. This is my local.conf file from yocto:
EXTRA_IMAGE_FEATURES += "debug-tweaks"
EXTRA_IMAGE_FEATURES += "ssh-server-dropbear"
EXTRA_IMAGE_FEATURES += "tools-debug"
EXTRA_IMAGE_FEATURES += "dev-pkgs"IMAGE_INSTALL:append = " qtbase qtbase-plugins qttools qtquickcontrols2 qtwayland qtconnectivity qtsvg qtmultimedia qtmultimedia-plugins qtx11extras qtdeclarative"
IMAGE_INSTALL:append = " boost"
IMAGE_INSTALL:append = " libgusb"
IMAGE_INSTALL:append = " openssl"
IMAGE_INSTALL:append = " protobuf"
IMAGE_INSTALL:append = " protobuf-c"
IMAGE_INSTALL:append = " gstreamer1.0 gstreamer1.0-libav gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly"
IMAGE_INSTALL:append = " opengl-es-cts"
IMAGE_INSTALL:append = " glib-2.0"
IMAGE_INSTALL:append = " zlib"
IMAGE_INSTALL:append = " librtaudio"
IMAGE_INSTALL:append = " grpc"
IMAGE_INSTALL:append = " gpsd"
IMAGE_INSTALL:append = " liberation-fonts"IMAGE_INSTALL:append = " kernel-module-imx-gpu-viv"
IMAGE_INSTALL:append = " imx-gpu-viv"IMAGE_INSTALL:append = " alsa-lib"
IMAGE_INSTALL:append = " alsa-plugins"
IMAGE_INSTALL:append = " alsa-utils"
IMAGE_INSTALL:append = " alsa-tools"
IMAGE_INSTALL:append = " pulseaudio"IMAGE_INSTALL:append = " imx-test"
PACKAGECONFIG_FONTS:append_pn-qtbase = " fontconfig"
PACKAGECONFIG:append_pn-qtmultimedia = " gstreamer alsa pulseaudio"DISTRO_FEATURES:append = " wayland"
DISTRO_FEATURES:append = " alsa"
CORE_IMAGE_EXTRA_INSTALL += " wayland weston"TOOLCHAIN_HOST_TASK:append = " nativesdk-cmake"
TOOLCHAIN_HOST_TASK:append = " nativesdk-protobuf"
TOOLCHAIN_HOST_TASK:append = " nativesdk-protobuf-compiler"
TOOLCHAIN_HOST_TASK:append = " nativesdk-pkgconfig"LICENSE_FLAGS_ACCEPTED = "commercial"
Does anyone know what could be missing or why Qt is not recognizing the microphone as it does on PC?
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Hi,
Your configuration seems to indicate you have a commercial license hence you should contact the Qt Company for support.
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Which version of Qt are you deploying ?
