This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| golang.org/x/net | `v0.34.0` -> `v0.35.0` |
[![age](https://developer.mend.io/api/mc/badges/age/go/golang.org%2fx%2fnet/v0.35.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/go/golang.org%2fx%2fnet/v0.35.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/go/golang.org%2fx%2fnet/v0.34.0/v0.35.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/go/golang.org%2fx%2fnet/v0.34.0/v0.35.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Configuration

📅 **Schedule**: Branch creation - "on the first day of the month" (UTC),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/pion/webrtc).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4xNzYuMiIsInVwZGF0ZWRJblZlciI6IjM5LjE3Ni4yIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbXX0=-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

1. Replaced the OBU reader with the AV1 depacketizer to actually handle
RTP input.
2. Now explicitly constructing OBUTemporalDelimiter to ensure proper
separation of frames.

Break the WriteRTP function into smaller functions for each codec type.