intfd=open("/dev/video0",O_RDWR);if(fd==-1){perror("open");exit(EXIT_FAILURE);} 1. 2. 3. 4. 5. 设置视频格式:然后需要通过VIDIOC_S_FMT命令设置视频格式,包括帧格式、分辨率、颜色格式等。 structv4l2_formatfmt;memset(&fmt,0,sizeof(fmt));fmt.type=V4L2_BUF_TYPE_VIDEO_CAPTURE;fmt.fm...
* V4L2_BUF_TYPE_VIDEO_OUTPUT = 2, // 指定buf的类型为output,用于视频输出设备 * V4L2_BUF_TYPE_VIDEO_OVERLAY = 3, // 指定buf的类型为overlay,用于可预览设备 * V4L2_BUF_TYPE_VBI_CAPTURE = 4, // 用于vbi捕获设备 * V4L2_BUF_TYPE_VBI_OUTPUT = 5, // 用于vbi输出设备 * V4L2_BUF_TYPE_SL...
{ // handle error } struct v4l2_format fmt = {0}; fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; fmt.fmt.pix.width = 640; fmt.fmt.pix.height = 480; fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; fmt.fmt.pix.field = V4L2_FIELD_NONE; if (ioctl(fd, VIDIOC_S_FMT, &fmt) == -1) ...
vd->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; vd->fmt.fmt.pix.width = vd->width; vd->fmt.fmt.pix.height = vd->height; vd->fmt.fmt.pix.pixelformat = vd->formatIn;//指定输出格式,已指定是V4L2_PIX_FMT_MJPEG vd->fmt.fmt.pix.field = V4L2_FIELD_ANY; ret = ioctl(vd->fd, VIDIOC_...
在设置驱动支持的像素格式时我发现只能选择YUYV、BT656、SGBR10这类格式,我尝试在驱动里设置V4L2_PIX_FMT_GREY或者V4L2_PIX_FMT_Y16都不行,发现时dvsdk 4.02 的isp.c里不支持上述两种格式,所以应用程序设置格式时会出错。 我的探测器只能输出并行10bit的灰度数据,如果我被迫在驱动里设置探测器支持的格式为V4L2_PIX...
Signed-off-by: Hans Verkuil <hverk...@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mche...@redhat.com> drivers/media/video/tvp7002.c | 126 --- 1 files changed, 0 insertions(+), 126 deletions(-) ---
int argc=1, width=640, height=512, fps=5, format=V4L2_PIX_FMT_YUYV, i; in_cmd_type led = IN_CMD_LED_AUTO; /* initialize the mutes variable */ if( pthread_mutex_init(&controls_mutex, NULL) != 0 ) { IPRINT("could not initialize mutex variable\n"); ...