* add variant which writes video to /dev/null
* (try?) to compile with debug symbols. (it seems to work but
cargo flamegraph still seems to complain?)
* faster parsing of inline data. I'd like to figure out why this is
slow with rtsp_types and fix it, but anyway in this benchmark I want
to just focus on the depacketization
These are huge, not present for every stream, and only allocated once at
describe time, so boxing makes sense. I probably should listen to that
clippy lint!