rpicamsrc: fix nal alignment
It looks like rpicamsrc
doesn't necessarily output a full NAL with each buffer, it looks like occasionally a NAL gets split and then there's a buffer that doesn't contain a full NAL.
Which makes h264parse
error out.
So this needs fixing in some way, either by fixing the aggregation at the source (if it's signalled properly), or by removing the nal-alignment from the output caps.