Package: libqt5multimedia5
Version: 5.3.2-2~bpo70+2
Severity: important
Dear Maintainers,
Thank you for the recent backport of QT5 to wheezy-backports. I am
using this version, and running into a problem with multimedia audio.
My system has alsa devices; pulseaudio is not installed.
QT5 audio programs see no devices. Including tools in
/usr/lib/x86_64-linux-gnu/qt5/examples/multimedia/.
To verify, I modified the main.cpp for the audioinput example to output
audio device info. Diff follows.
I was expecting to see alsa devices, but instead
QAudioDeviceInfo::defaultInputDevice() returns a null device, and
QAudioDeviceInfo::availableDevices() returns an empty list.
libqt5multimedia5-plugins, libqt5multimediaquick-p5 and
libqt5multimediawidgets5 are also installed.
Any advice you have to debug this would be welcomed.
Thank you.
-Chris
--- /usr/lib/x86_64-linux-gnu/qt5/examples/multimedia/audioinput/main.cpp
2014-09-11 06:48:26.000000000 -0400
+++ main.cpp 2014-11-29 00:54:46.367809159 -0500
@@ -39,6 +39,9 @@
****************************************************************************/
#include <QtWidgets>
+#include <QAudioDeviceInfo>
+#include <QAudioInput>
+#include <QTextStream>
#include "audioinput.h"
@@ -47,6 +50,15 @@
QApplication app(argv, args);
app.setApplicationName("Audio Input Test");
+ const QAudioDeviceInfo &defaultDeviceInfo =
QAudioDeviceInfo::defaultInputDevice();
+ QTextStream(stdout) << "default: " << defaultDeviceInfo.deviceName() << "
isNull? " << defaultDeviceInfo.isNull() << endl;
+ foreach (const QAudioDeviceInfo &deviceInfo,
QAudioDeviceInfo::availableDevices(QAudio::AudioInput)) {
+ if (deviceInfo != defaultDeviceInfo)
+ QTextStream(stdout) << "device: " <<
deviceInfo.deviceName() << " isNull? " << defaultDeviceInfo.isNull() << endl;
+ }
+ return 0;
+
+
InputTest input;
input.show();
Output:
$ ./audioinput
PulseAudioService: pa_context_connect() failed
default: isNull? 1
-- System Information:
Debian Release: 7.7
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.16-0.bpo.3-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages libqt5multimedia5 depends on:
ii libc6 2.19-7
ii libpulse0 4.0-6~bpo7+1
ii libqt5core5a [qtbase-abi-5-3-2] 5.3.2+dfsg-4~bpo70+1
ii libqt5gui5 5.3.2+dfsg-4~bpo70+1
ii libqt5network5 5.3.2+dfsg-4~bpo70+1
ii libstdc++6 4.9.1-19
ii multiarch-support 2.13-38+deb7u6
libqt5multimedia5 recommends no packages.
libqt5multimedia5 suggests no packages.
-- no debconf information
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