V4L_TS_DEFAULT     68 libavdevice/v4l2.c #define V4L_TS_CONVERT_READY V4L_TS_DEFAULT
V4L_TS_DEFAULT   1120 libavdevice/v4l2.c     { "default",      "use timestamps from the kernel",                           OFFSET(ts_mode),      AV_OPT_TYPE_CONST,  {.i64 = V4L_TS_DEFAULT  }, 0, 2, DEC, "timestamps" },