ivtv_start_v4l2_encode_stream
ret = ivtv_start_v4l2_encode_stream(s);
if (ivtv_start_v4l2_encode_stream(s_vbi)) {
if (!ivtv_start_v4l2_encode_stream(s)) {
EXPORT_SYMBOL(ivtv_start_v4l2_encode_stream);
int ivtv_start_v4l2_encode_stream(struct ivtv_stream *s);