0:00:01.135470147 [335m 2446[00m   0xa7ace0 [37mDEBUG  [00m [00m                v4l2 gstv4l2object.c:1279:gst_v4l2_object_v4l2fourcc_to_bare_struct:[00m Unknown fourcc 0x50313459 Y41P
0:00:01.229903837 [335m 2446[00m   0xa7ace0 [31;01mERROR  [00m [00;01;37;41m        GST_PIPELINE ./grammar.y:616:gst_parse_perform_link:[00m could not link v4l2src0 to h264parse0
WARNING: erroneous pipeline: could not link v4l2src0 to h264parse0
