webrtc publish resolution 640x480

[ddev25]

Question

Resolution transmitted via webrtc 640x480. It does not change in any way when editing the settings. This behavior is observed on various devices, as well as various browsers. Please help me

[Taps7734]

Was just coming here to ask the same thing.

[aler9]

If the question is "I'm using the WebRTC publish page embedded inside MediaMTX to try publishing a stream and despite editing the form and setting a resolution different than 640x480 I'm always getting a 640x480 stream" (as mentioned in the instructions you have to be extremely clear when you create a discussion otherwise there's no way to get an answer) the answer is that the problem is browser related, since resolution is just an hint that browsers use to pick a resolution between available ones. If the desired resolution is not available, the closest one is picked.
We cannot do anything about it.
More infos are here:

https://developer.mozilla.org/en-US/docs/Web/API/MediaTrackConstraints/width

the value of this ConstrainULong will guide the user agent in its efforts to provide an exact match to the required width (if exact is specified or both min and max are provided and have the same value) or to a best-possible value

[Taps7734]

Question

Resolution transmitted via webrtc 640x480. It does not change in any way when editing the settings. This behavior is observed on various devices, as well as various browsers. Please help me

As a test, I took the publish_index.html and publisher.js used it as a starting point to test this.

I changed the section starting at line 216 to from
if (videoId !== 'none') { videoOpts = { deviceId: videoId, }; }

to

if (videoId !== 'none') { videoOpts = { deviceId: videoId, width: 1920, height: 1080 }; }

This did work and sent the video to MediaMTX server as 1920x1080.

Its a start.

[aler9]

i checked again and incredibly these lines were missing from the publish page. Strange that no one noticed that before.
This is fixed by #4171