Original commit message from CVS:
Patch by: Mark Nauwelaerts <manauw skynet be>
* sys/oss/gstosssrc.c: (gst_oss_src_init), (gst_oss_src_getcaps),
(gst_oss_src_close):
* sys/oss/gstosssrc.h:
Cache probed caps, so _get_caps() during recording doesn't cause
ioctl calls which may disrupt the recording (fixes#521875).