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安装 droidcam 时出错

tag-icon • tag-icon software-installation dpkg droidcam
安装 droidcam 时出错

键入后sudo apt-get install droidcam

我收到错误：-

Setting up droidcam (1.3-0ubuntu0) ...
tar: *.tar.gz: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
dpkg: error processing package droidcam (--configure):
 subprocess installed post-installation script returned error exit status 2
Errors were encountered while processing:
 droidcam
E: Sub-process /usr/bin/dpkg returned an error code (1)

输出sudo apt-cache policy droidcam

droidcam:
  Installed: 1.3-0ubuntu0
  Candidate: 1.3-0ubuntu0
  Version table:
 *** 1.3-0ubuntu0 0
        500 http://ppa.launchpad.net/paolorotolo/droidcam/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status

如何解决这个问题？

答案1

实际上，您提到的错误是第一次安装尝试后的第二种状态。

  • 第一次尝试以 make/编译错误结束并删除模块源档案（没有检查构建是否成功）。
  • 下一次试验显示缺少内核模块源档案。

这是原始错误（完整日志)：

make -C /lib/modules/`uname -r`/build M=`pwd`                                                                                                                                          
make[1]: Entering directory '/usr/src/linux-headers-3.19.0-30-generic'                                                                                                                 
  LD      /opt/droidcam/v4l2loopback/built-in.o                                                                                                                                        
  CC [M]  /opt/droidcam/v4l2loopback/v4l2loopback-dc.o                                                                                                                                 
/opt/droidcam/v4l2loopback/v4l2loopback-dc.c: In function ‘attr_store_maxopeners’:                                                                                                     
/opt/droidcam/v4l2loopback/v4l2loopback-dc.c:456:3: error: implicit declaration of function ‘strict_strtoul’ [-Werror=implicit-function-declaration]
   if (strict_strtoul(buf, 0, &curr))
   ^
/opt/droidcam/v4l2loopback/v4l2loopback-dc.c: At top level:
/opt/droidcam/v4l2loopback/v4l2loopback-dc.c:2311:3: warning: initialization from incompatible pointer type
   .vidioc_s_std            = &vidioc_s_std,
   ^
/opt/droidcam/v4l2loopback/v4l2loopback-dc.c:2311:3: warning: (near initialization for ‘v4l2_loopback_ioctl_ops.vidioc_s_std’)
/opt/droidcam/v4l2loopback/v4l2loopback-dc.c:2331:3: warning: initialization from incompatible pointer type
   .vidioc_s_audio          = &vidioc_s_audio,
   ^
/opt/droidcam/v4l2loopback/v4l2loopback-dc.c:2331:3: warning: (near initialization for ‘v4l2_loopback_ioctl_ops.vidioc_s_audio’)
/opt/droidcam/v4l2loopback/v4l2loopback-dc.c:2333:3: warning: initialization from incompatible pointer type
   .vidioc_s_audout         = &vidioc_s_audout,
   ^
/opt/droidcam/v4l2loopback/v4l2loopback-dc.c:2333:3: warning: (near initialization for ‘v4l2_loopback_ioctl_ops.vidioc_s_audout’)
cc1: some warnings being treated as errors
scripts/Makefile.build:263: recipe for target '/opt/droidcam/v4l2loopback/v4l2loopback-dc.o' failed
make[2]: *** [/opt/droidcam/v4l2loopback/v4l2loopback-dc.o] Error 1
Makefile:1395: recipe for target '_module_/opt/droidcam/v4l2loopback' failed
make[1]: *** [_module_/opt/droidcam/v4l2loopback] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-3.19.0-30-generic'
Makefile:4: recipe for target 'all' failed
make: *** [all] Error 2

为了修复原始错误，strict_strtoul被替换为kstrtoul

  1. 获取源代码

    sudo apt-add-repository -s ppa:paolorotolo/droidcam
sudo apt-get update

mkdir sand_box
cd sand_box

apt-get source droidcam
cd droidcam-*/

  2. 安装构建依赖项

    sudo apt-get builddep droiddeb
sudo apt-get install devscripts debhelper

  3. 替换strict_strtoul为kstrtoul：

    • droidcam-v4l2-x64.tar.gz：/v4l2loopback/v4l2loopback-dc.c
    • droidcam-v4l2-x86.tar.gz：/v4l2loopback/v4l2loopback-dc.c

  4. 构建和安装

    debbuild -d -uc
sudo dpkg -i ../droidcam_*.deb

另一种方法，无需重建 Debian 软件包：

  1. 尝试安装后，如果出现错误，请运行：

    sudo apt-get install droidcam

  2. 转到/var/cache/apt/archives/。使用存档管理器打开其包并提取两个droidcam-v4l2-*.tar.gz文件（或只需要 arch）

  3. 替换strict_strtoul为kstrtoul：

    • droidcam-v4l2-x64.tar.gz：/v4l2loopback/v4l2loopback-dc.c
    • droidcam-v4l2-x86.tar.gz：/v4l2loopback/v4l2loopback-dc.c

  4. 将两个档案移至 /opt/droidcam/

    sudo mv droidcam-v4l2-*.tar.gz /opt/droidcam/

  5. 再次运行安装以重建它

    sudo apt-get install droidcam

参考：

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