WebRTC - 从Chrome获取“格式错误的约束对象”，而不是Firefox [英] WebRTC - getting 'malformed constraints object' from Chrome but not Firefox

问题描述

我想知道我做错了什么。

I wonder what I'm doing wrong.

我从这里得到'格式错误的约束对象'错误：

I'm getting 'malformed constraints object' errors from this:

pc.createAnswer( function (answer) {
  ...
}, fail, { offerToReceiveAudio: true, offerToReceiveVideo: true });

任何想法？

推荐答案

根据最新的 Webrtc规范，约束的正确形式参数应为：

According to the newest Webrtc spec the correct form of the constraint parameter should be:

{ offerToReceiveAudio: true, offerToReceiveVideo: true }

请注意开头的小写'o'来自offerToReceiveAudio 和 offerToReceiveVideo 。

目前只支持FF 33或更高版本。

This is currently supported only by FF 33 or newer.

Chrome仅支持自己的方式：

Chrome supports only the own way:

{ mandatory: { OfferToReceiveAudio: true, OfferToReceiveVideo: true } }

如果你给它一个具有新规格结构的约束对象，Chrome会抛出错误。

Chrome will throw and error if you give it a constraint object that has a structure according to the new spec.

好消息是Firefox仍然接受旧表格。在这种情况下，它只会打印一条警告消息。所以，至少现在，使用旧版本。

The good news is that Firefox still accepts the old form. It just prints a warning message in that case. So, at least for now, use the old version.

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