Yocto with Qt5.5 and alsa support for playing audio
I use Yocto (Jethro) to configure a Toradex imx6 board. At first I use pulseaudio for playing audio and gstreamer 1.0 to play videos in QML. As long as I do not play audio and video in the same application everything works well. So I want to use alsa for playing audio too. I removed pulseaudio server and Qt support for pulseaudio in my local.conf Yocto file and add alsa support to Qt. Now videos play well but QML audio finds no audio device. The following alsa packages are installed.
alsa-conf - 1.0.29-r0
alsa-conf-base - 1.0.29-r0
alsa-lib - 1.0.29-r0
alsa-plugins - 1.0.29-r0
alsa-state - 0.2.0-r5
alsa-states - 0.2.0-r5
alsa-utils - 1.0.29-r0
alsa-utils-aconnect - 1.0.29-r0
alsa-utils-alsactl - 1.0.29-r0
alsa-utils-alsaloop - 1.0.29-r0
alsa-utils-alsamixer - 1.0.29-r0
alsa-utils-alsaucm - 1.0.29-r0
alsa-utils-amixer - 1.0.29-r0
alsa-utils-aplay - 1.0.29-r0
alsa-utils-aseqdump - 1.0.29-r0
alsa-utils-aseqnet - 1.0.29-r0
alsa-utils-iecset - 1.0.29-r0
alsa-utils-midi - 1.0.29-r0
alsa-utils-speakertest - 1.0.29-r0
fsl-alsa-plugins - 1.0.25-r0
gstreamer1.0-plugins-base-alsa - 1.4.5-r0
packagegroup-base-alsa - 1.0-r83
I found many hints in different forums that pulseaudio is highly integrated in Qt and is not easy to remove. So probably QML uses a wrong default device i.e. a non existent pulseaudio device. Any idea what I can do next?
My local conf file contains the following extensions:
LICENSE_FLAGS_WHITELIST = "commercial"
IMAGE_INSTALL_append = "
PACKAGECONFIG_append_pn-qtmultimedia = " gstreamer alsa openal"
PACKAGECONFIG_remove_pn-qtmultimedia = " pulseaudio"
PACKAGECONFIG_append_pn-gstreamer1.0-plugins-ugly = "a52dec lame mad mpeg2dec x264"