Qt通过源码编译安装。 问题 运行Qt 自带事例QAudioOutput ,当调用 QAudioDeviceInfo::availableDevices 获取可用的音频输出设备列表时,报错 "using null output device none available",不能正常播放音频。 解决 查看Qt安装目录中的插件目录 plugins 正常情况下,这里面应该有一个audio...
1. defaultServiceProvider::requestService(): no service found for - “org.qt-pr 2. using null output device, none available 在目标机上折腾了很长时间,在截止日前两天仍然搞不定。 于是换个思路,既然直接双击音频可以播放,说明OS层面对音频的支持没问题。可以考虑Qt以外的播放功能。 找到了aplay, 先尝...
1.在线安装 yum install -y vim 示例含义：在线安装vim服务 注意：如果要加速yum在线下载需要修改yum源...
rawdisk="MyLinuxVM.raw"vhddisk="MyLinuxVM.vhd"MB=$((1024*1024)) size=$(qemu-img info -f raw --output json"$rawdisk"| \ gawk'match($0, /"virtual-size": ([0-9]+),/, val) {print val[1]}') rounded_size=$((($size+$MB-1)/$MB)*$MB))echo"Rounded Size =$rounded_size...
logoutput: syslog internal: 192.168.5.1 port = 1080 external: 8.4.113.5 method: username none user.privileged: root user.notprivileged: nobody user.libwrap: nobody connecttimeout: 30 iotimeout: 86400 client pass { from: 192.168.5.0/24 to: 0.0.0.0/0 ...
3. Using ‘free’ Command – Show Swap Usage Thefreecommand is used to display the amount of free and used system memory. Using thefree commandwith-hoption, which displays output in a human-readable format. # free -htotal used free shared buffers cached Mem: 7.7G 4.7G 3.0G 408M 182M...
master Documentation LICENSES arch block certs crypto drivers fs include init io_uring ipc kernel lib mm net rust samples scripts security sound tools usr virt .clang-format .cocciconfig .editorconfig .get_maintainer.ignore .gitattributes .gitignore ...
Examine output from cat /proc/partitions and sudo fdisk -l [device] to determine the location of your USB drive. For example, sudo fdisk -l /dev/sdb. These instructions assume your USB drive is the /dev/sdb device, which is typical if you insert the USB drive after the machine is ...
UEFI启动BIOS(Basic Input Output System 基本输入输出系统)主要完成系统硬件自检和引导操作系统,操作系统开始启动之后,BIOS的任务就完成了。系统硬件自检:如果系统硬件有故障,主板上的扬声器就会发出长短不同的“滴滴”音,可以简单的判断硬件故障,比如“1长1短”通常表示内存故障,“1长3短”通常...
viewusb.AllowAudioOut {m|o}:{true|false} undefined, which equates to false Set this option to allow or disallow redirection of audio output devices. viewusb.AllowAutoDeviceSplitting {m|o}:{true|false} undefined, which equates to false Set this option to allow or disallow the aut...