WebRTC on a standalone mobile app

Question

I know that WebRTC was designed for browsers, but is it possible to use WebRTC libraries on mobile applications directly?

Thanks!

Answer 1

As of May 14 here is an android project using WebRTC that works nicely.

I translated that entire android project to Objective-C for iOS and got WebRTC working in iOS too but I'm having trouble on iPhone 4 and 4s. Just works in iPhone 5 and 5s.

I think the problem is the performance. When I make a videocall with the webrtc libraries it takes about 140% of the CPU on an iPhone 5, which I guess that's a lot of resources and the iPhone 4s can't handle it.

---

Edited

After struggling with the video connection (always disconnected after 10 seconds) I finally got WebRTC working on iPhone 4s, all you have to do is set the right constraints when creating the local videoSource capturing object:

NSString *_width = @"320";
NSString *_height = @"180";
NSString *_maxFrameRate = @"10";

RTCMediaConstraints *videoConstraints = [[RTCMediaConstraints alloc]   
initWithMandatoryConstraints:@[[[RTCPair alloc] initWithKey:@"maxHeight" value:_height],
[[RTCPair alloc] initWithKey:@"maxWidth" value:_width],
[[RTCPair alloc] initWithKey:@"maxFrameRate" value:_maxFrameRate]] optionalConstraints:@[[[RTCPair alloc] 
initWithKey:@"googCpuOveruseDetection" value:@"true"],
[[RTCPair alloc] initWithKey:@"googCpuLimitedResolution" value:@"true"]]];


RTCVideoSource *videoSource = [factory videoSourceWithCapturer:capturer constraints:videoConstraints];
RTCMediaStream *lms = [factory mediaStreamWithLabel:@"ARDAMS"];
[lms addVideoTrack:[factory videoTrackWithID:@"ARDAMSv0" source:videoSource]];

Note that this sends a very small video, but it works!