- From: Jan-Ivar Bruaroey via GitHub <sysbot+gh@w3.org>
- Date: Wed, 17 Apr 2024 00:22:05 +0000
- To: public-webrtc-logs@w3.org
In my mind, the following needs to hold regardless of domain details:
1. the match algorithm needs to distinguish all entries returned from `RTCRtpReceiver.getCapabilities()`
2. IOW it by definition contains no "duplicates"
3. The following must be valid/succeed
```js
videoTransceiver.setCodecPreferences(RTCRtpReceiver.getCapabilities("video"));
audioTransceiver.setCodecPreferences(RTCRtpReceiver.getCapabilities("audio"));
```
Those seem to be the APIs the match algorithm are in service of.
A quick [dump](https://jsfiddle.net/jib1/5v9zb03t/9/) of getCapabilities() reveal:
```js
{
"clockRate": 90000,
"mimeType": "video/H264",
"sdpFmtpLine": "level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42001f"
},
{
"clockRate": 90000,
"mimeType": "video/H264",
"sdpFmtpLine": "level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42001f"
},
```
This suggests they are distinct codecs to me. Does that match your understanding?
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