4. 查看视频设备的当前参数:使用v4l2-ctl -d /dev/videoX –get-fmt-video命令可以查看指定视频设备的当前参数,包括视频的宽度、高度和像素格式。 5. 拍摄照片或录制视频:可以使用v4l2-ctl -d /dev/videoX –set-ctrl=xxx命令来设置指定视频设备的控制参数,如亮度、对比度、饱和度等。然后使用v4l2-ctl -d /...
v4l2-ctl --device=/dev/video0 --get-fmt-video 执行该命令后,将显示当前设备的分辨率和像素格式。如果显示的值与设置的值一致,则说明分辨率设置成功。 此外,还可以使用图像捕获工具(如fswebcam或cheese)来捕获一张照片,并检查照片的分辨率是否已更改。例如,使用fswebcam捕获一张照片的命令如下: shell fswebcam -...
.vidioc_enum_fmt_vid_cap =uvc_ioctl_enum_fmt_vid_cap,---VIDIOC_ENUM_FMT .vidioc_enum_fmt_vid_out =uvc_ioctl_enum_fmt_vid_out, .vidioc_g_fmt_vid_cap =uvc_ioctl_g_fmt_vid_cap,---VIDIOC_G_FMT .vidioc_g_fmt_vid_out =uvc_ioctl_g_fmt_vid_out, .vidioc_s_fmt_vid_cap =uvc_i...
staticconststructv4l2_subdev_pad_ops sditf_subdev_pad_ops ={ .set_fmt=sditf_get_set_fmt, .get_fmt=sditf_get_set_fmt, .get_selection=sditf_get_selection, .get_mbus_config=sditf_g_mbus_config, };staticconststructv4l2_subdev_video_ops sditf_video_ops ={ .g_frame_interval=sditf_g...
int get_frame_fmt(int fd) { struct v4l2_fmtdesc fmtdesc; fmtdesc.index=0; fmtdesc.type=V4L2_BUF_TYPE_VIDEO_CAPTURE; printf("info:Support format:"); while(ioctl(fd,VIDIOC_ENUM_FMT,&fmtdesc)!=-1) { printf("\t%d.%s",fmtdesc.index+1,fmtdesc.description); fmtdesc.index++; } print...
staticintvideo_getfmt(intfd) { /***get Stream data format***/ intret= 0; structv4l2_format fmt; CLEAR(fmt); fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; ret = ioctl(fd, VIDIOC_G_FMT, &fmt); if(ret < 0) { perror("VIDIOC_G_FMT...
120 GetDispResolution(&iLcdWidth, &iLcdHeigt, &iLcdBpp); 121 memset(&tV4l2Fmt, 0, sizeof(struct v4l2_format)); 122 tV4l2Fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 123 tV4l2Fmt.fmt.pix.pixelformat = ptVideoDevice->iPixelFormat;
static int rkcif_sanity_check_fmt(struct rkcif_stream *stream, const struct v4l2_rect *s_crop) { struct rkcif_device *dev = stream->cifdev; struct v4l2_device *v4l2_dev = &dev->v4l2_dev; struct v4l2_rect input, *crop; stream->cif_fmt_in = get_input_fmt(dev->active_sensor->sd...
v4l2-ctl -d /dev/video2 --set-fmt-video=width=4096,height=2160,pixelformat=MJPG get format (ensure that set fomat works) ==> v4l2-ctl -d /dev/video2 --get-fmt-video Format Video Capture: Width/Height : 4096/2160 Pixel Format : ‘MJPG’ (Motion-JPEG) ...
v4l2_fmtdesc *f);int(*vidioc_enum_fmt_vid_out)(structfile *file,void*fh,structv4l2_fmtdesc *f);int(*vidioc_enum_fmt_sdr_cap)(structfile *file,void*fh,structv4l2_fmtdesc *f);int(*vidioc_enum_fmt_sdr_out)(structfile *file,void*fh,structv4l2_fmtdesc *f);int(*vidioc_enum_fmt_...