What has really happened is that the longioctl()function has been moved intodrivers/media/video/videodev.c. This code handles the movement of data between user and kernel space and dispatches individualioctl()calls to the driver. To use it, the driver need only usevideo_ioctl2()as itsioctl...
用户就可以在用户程序中使用ioctl函数来控制设备的I/O通道。
ioctl(VIDIOC_G_INPUT): inappropriate ioctl 错误表明,在尝试使用 ioctl 系统调用并传递 VIDIOC_G_INPUT 命令时,该命令对当前设备或上下文来说是不适当的。简单来说,就是尝试执行了一个不被当前设备支持的操作。 2. 可能的原因 设备不支持:尝试使用的视频设备(如摄像头)可能不支持 VIDIOC_G_INPUT 命令。这通常...
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used) [video4linux2,v4l2 @ 0xd2d270] ioctl(VIDIOC_DQBUF): No such device ...
An MeV ion-microbeam lithographic technique can be successfully employed for the fabrication of an all-carbon miniaturized cellular biosensor based on grap... F Picollo,S Gosso,E Vittone,... - 《Advanced Materials》 被引量: 38发表: 2013年 Microbial Synthesis of Medium-Chain α,ω-Dicarboxylic...