[Gentoo] Gentoo下配置使用USB摄像头应用

话说Gentoo下配置这个鸟东东还比较折腾人的，所以这个地方暂时记录下自己的折腾经历。

首先是驱动，话说linux下的万事一切从驱动开始。插上我的那个好久没有用过的USB摄像头，用lsusb看一下，结果发现:

Bus 008 Device 002: ID 0ac8:3333 Z-Star Microelectronics Corp.

恩，不懂，所以google吧。网上搜索到很多关于这个的文章，大致看了下。先去配置内核，我的.config文件内容有关于USB摄像头的部分如下:

CONFIG_MEDIA_SUPPORT=m

#
# Multimedia core support
#
CONFIG_VIDEO_DEV=m
CONFIG_VIDEO_V4L2_COMMON=m
# CONFIG_VIDEO_ALLOW_V4L1 is not set
CONFIG_VIDEO_V4L1_COMPAT=y
# CONFIG_DVB_CORE is not set
CONFIG_VIDEO_MEDIA=m

#
# Multimedia drivers
#
# CONFIG_IR_CORE is not set
CONFIG_MEDIA_ATTACH=y
CONFIG_MEDIA_TUNER=m
CONFIG_MEDIA_TUNER_CUSTOMISE=y
CONFIG_MEDIA_TUNER_SIMPLE=m
# CONFIG_MEDIA_TUNER_TDA8290 is not set
# CONFIG_MEDIA_TUNER_TDA827X is not set
# CONFIG_MEDIA_TUNER_TDA18271 is not set
CONFIG_MEDIA_TUNER_TDA9887=m
# CONFIG_MEDIA_TUNER_TEA5761 is not set
# CONFIG_MEDIA_TUNER_TEA5767 is not set
# CONFIG_MEDIA_TUNER_MT20XX is not set
# CONFIG_MEDIA_TUNER_MT2060 is not set
# CONFIG_MEDIA_TUNER_MT2266 is not set
# CONFIG_MEDIA_TUNER_MT2131 is not set
# CONFIG_MEDIA_TUNER_QT1010 is not set
# CONFIG_MEDIA_TUNER_XC2028 is not set
# CONFIG_MEDIA_TUNER_XC5000 is not set
# CONFIG_MEDIA_TUNER_MXL5005S is not set
# CONFIG_MEDIA_TUNER_MXL5007T is not set
# CONFIG_MEDIA_TUNER_MC44S803 is not set
# CONFIG_MEDIA_TUNER_MAX2165 is not set
CONFIG_VIDEO_V4L2=m
CONFIG_VIDEO_CAPTURE_DRIVERS=y
CONFIG_VIDEO_ADV_DEBUG=y
CONFIG_VIDEO_FIXED_MINOR_RANGES=y
CONFIG_VIDEO_HELPER_CHIPS_AUTO=y
# CONFIG_VIDEO_VIVI is not set
# CONFIG_VIDEO_BWQCAM is not set
# CONFIG_VIDEO_CQCAM is not set
# CONFIG_VIDEO_W9966 is not set
# CONFIG_VIDEO_SAA5246A is not set
# CONFIG_VIDEO_SAA5249 is not set
# CONFIG_VIDEO_ZORAN is not set
# CONFIG_VIDEO_MXB is not set
# CONFIG_VIDEO_HEXIUM_ORION is not set
# CONFIG_VIDEO_HEXIUM_GEMINI is not set
# CONFIG_VIDEO_CAFE_CCIC is not set
# CONFIG_SOC_CAMERA is not set
CONFIG_V4L_USB_DRIVERS=y
CONFIG_USB_VIDEO_CLASS=m
CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y
CONFIG_USB_GSPCA=m
# CONFIG_USB_M5602 is not set
# CONFIG_USB_STV06XX is not set
# CONFIG_USB_GL860 is not set
# CONFIG_USB_GSPCA_BENQ is not set
# CONFIG_USB_GSPCA_CONEX is not set
# CONFIG_USB_GSPCA_CPIA1 is not set
# CONFIG_USB_GSPCA_ETOMS is not set
# CONFIG_USB_GSPCA_FINEPIX is not set
# CONFIG_USB_GSPCA_JEILINJ is not set
# CONFIG_USB_GSPCA_MARS is not set
# CONFIG_USB_GSPCA_MR97310A is not set
CONFIG_USB_GSPCA_OV519=m
CONFIG_USB_GSPCA_OV534=m
CONFIG_USB_GSPCA_OV534_9=m
# CONFIG_USB_GSPCA_PAC207 is not set
# CONFIG_USB_GSPCA_PAC7302 is not set
# CONFIG_USB_GSPCA_PAC7311 is not set
# CONFIG_USB_GSPCA_SN9C2028 is not set
# CONFIG_USB_GSPCA_SN9C20X is not set
# CONFIG_USB_GSPCA_SONIXB is not set
# CONFIG_USB_GSPCA_SONIXJ is not set
CONFIG_USB_GSPCA_SPCA500=m
CONFIG_USB_GSPCA_SPCA501=m
CONFIG_USB_GSPCA_SPCA505=m
CONFIG_USB_GSPCA_SPCA506=m
CONFIG_USB_GSPCA_SPCA508=m
CONFIG_USB_GSPCA_SPCA561=m
CONFIG_USB_GSPCA_SPCA1528=m
# CONFIG_USB_GSPCA_SQ905 is not set
# CONFIG_USB_GSPCA_SQ905C is not set
# CONFIG_USB_GSPCA_SQ930X is not set
# CONFIG_USB_GSPCA_STK014 is not set
# CONFIG_USB_GSPCA_STV0680 is not set
# CONFIG_USB_GSPCA_SUNPLUS is not set
# CONFIG_USB_GSPCA_T613 is not set
# CONFIG_USB_GSPCA_TV8532 is not set
# CONFIG_USB_GSPCA_VC032X is not set
CONFIG_USB_GSPCA_ZC3XX=m
# CONFIG_VIDEO_PVRUSB2 is not set
# CONFIG_VIDEO_HDPVR is not set
# CONFIG_VIDEO_USBVISION is not set
# CONFIG_USB_ET61X251 is not set
# CONFIG_USB_SN9C102 is not set
# CONFIG_USB_ZR364XX is not set
# CONFIG_USB_STKWEBCAM is not set
# CONFIG_USB_S2255 is not set
# CONFIG_V4L_MEM2MEM_DRIVERS is not set
# CONFIG_RADIO_ADAPTERS is not set
# CONFIG_DAB is not set

然后是make && make modules_install && cp arch/x86_64/boot/bzImage /boot/linux-2.6.36-gentoo-r8

然后修改/boot/grub/grub.conf 完了reboot

重启后发现找到video设备了， ls /dev/video0

dmesg查看内核也发现了这个设备，并且在usb-core上注册成功。

好了，下面跑个应用看看。

# emerge camorama

# camorama

提示无法连接设备？晕 ，看看debug log

说VIDIOCGMBF  --  could not set buffer info, exiting...

恩，google看看

找到篇帖子

说是要在执行前export LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so

结果完了发现图像是出来了，但不是我想要的，如上贴所说。

又试用了下上贴提到的skype和cheese，发现ok的，效果还马马虎虎。

先记到这里吧。以后进一步看看情况。