nearly works

1 files changed, 9 insertions, 0 deletions

diff --git a/src/common_v4l2.h b/src/common_v4l2.h
index c3762b5..301deb6 100644
--- a/src/common_v4l2.h
+++ b/src/common_v4l2.h
@@ -44,6 +44,7 @@ void CommonV4l2_init(CommonV4l2 *this, char *dev_name, unsigned int x_res, unsig
     enum v4l2_buf_type type;
     struct v4l2_format fmt;
     struct v4l2_requestbuffers req;
+    struct v4l2_streamparm parm;
     unsigned int i;
 
     this->fd = v4l2_open(dev_name, O_RDWR | O_NONBLOCK, 0);
@@ -61,12 +62,20 @@ void CommonV4l2_init(CommonV4l2 *this, char *dev_name, unsigned int x_res, unsig
     if ((fmt.fmt.pix.width != x_res) || (fmt.fmt.pix.height != y_res))
         printf("Warning: driver is sending image at %dx%d\n",
             fmt.fmt.pix.width, fmt.fmt.pix.height);
+
     COMMON_V4L2_CLEAR(req);
     req.count = 2;
     req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
     req.memory = V4L2_MEMORY_MMAP;
     CommonV4l2_xioctl(this->fd, VIDIOC_REQBUFS, &req);
     this->buffers = calloc(req.count, sizeof(*this->buffers));
+
+    COMMON_V4L2_CLEAR(parm);
+    parm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+    parm.parm.capture.timeperframe.numerator = 1;
+    parm.parm.capture.timeperframe.denominator = 30;
+    CommonV4l2_xioctl(this->fd, VIDIOC_S_PARM, &parm);
+
     for (this->n_buffers = 0; this->n_buffers < req.count; ++this->n_buffers) {
         COMMON_V4L2_CLEAR(this->buf);
         this->buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;