Linux Static Builds ffmpeg version:2.7.1 can't grab audio when use --video4linux2 /dev/video0 to grab

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Linux Static Builds ffmpeg version:2.7.1 can't grab audio when use --video4linux2 /dev/video0 to grab

zq@ri-guard.com
Dear ffmpeg:
        I'm a new user of ffmpeg,may I ask a qustion?
        these days when i download linux static builds version 2.7.1 to grab audio in this process ffmpeg -f video4linux2 -i /dev/video0 -vcodec mpeg4 -b 2000k -r 30 /home/test.avi  ,failed!!
    error print:[video4linux2,v4l2 @ 0xb0d4e00] ioctl(VIDIOC_G_PARM): Inappropriate ioctl for device /dev/video0: Inappropriate ioctl for device
    I want to know the reson,whish to recive your answner!
   best whishes!!


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