}
}
+ if (ap->time_base.num && ap->time_base.den) {
+ struct v4l2_streamparm streamparm = { 0 };
+ struct v4l2_fract *tpf = &streamparm.parm.capture.timeperframe;
+
+ av_log(s1, AV_LOG_DEBUG, "Setting time per frame to %d/%d\n",
+ ap->time_base.num, ap->time_base.den);
+ streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ tpf->numerator = ap->time_base.num;
+ tpf->denominator = ap->time_base.den;
+ if (ioctl(s->fd, VIDIOC_S_PARM, &streamparm) != 0) {
+ av_log(s1, AV_LOG_ERROR,
+ "ioctl set time per frame(%d/%d) failed\n",
+ ap->time_base.num, ap->time_base.den);
+ return AVERROR(EIO);
+ }
+
+ if (ap->time_base.den != tpf->denominator ||
+ ap->time_base.num != tpf->numerator) {
+ av_log(s1, AV_LOG_INFO,
+ "The driver changed the time per frame from %d/%d to %d/%d\n",
+ ap->time_base.num, ap->time_base.den,
+ tpf->numerator, tpf->denominator);
+ ap->time_base.num = tpf->numerator;
+ ap->time_base.den = tpf->denominator;
+ }
+ }
+
return 0;
}