This information can be useful to zynqultrascaleplus decoders. They may
use this information to reduce startup latency by configuring itself
before receiving the first frames.
We also have a custom OMX extension allowing the decoder to report the
latency. The profile/level information helps it reporting a more
accurate latency earlier.
https://bugzilla.gnome.org/show_bug.cgi?id=783114
The decoder only requires to receive one frame per buffer which is
already enforced with 'alignment=au'. There is no need to require to
have a parser upstream.
Allow to run "encode ! decode" pipeline without having a parser.
https://bugzilla.gnome.org/show_bug.cgi?id=784344
The omxvideodecoder class only checks some of the caps parameters but if
other fields change such as h264 profile and/or level it wouldn't trigger a
reconfiguration.
https://bugzilla.gnome.org/show_bug.cgi?id=752376
