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Playing video-only via WebRTC is jerky

Discussion of bugs in Mozilla Firefox
umedia
 
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Joined: May 24th, 2018, 1:54 pm

Post Posted May 24th, 2018, 2:10 pm

Hello,

When playing video-only via WebRTC, does Firefox use video timestamps at all?
Or video renderer just plays video frames as soon as they are decoded?

This webpage plays H264 video encoded by IP camera via WebRTC, using Unreal Media Server.
http://umediaserver.net/umediaserver/de ... layer.html

It works fine with any browser and mobile device, but not in Firefox.
Streams with audio+video play fine, but video-only exhibit this jerkiness, as if timestamps are ignored at all.

malliz
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Post Posted May 25th, 2018, 2:54 am

Well I just tried it with Internet Explorer and Edge and it was jerky in both of those as well. So perhaps you can define "any other browser" ?
What sort of man would put a known criminal in charge of a major branch of government? Apart from, say, the average voter.
"Terry Pratchett"

umedia
 
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Joined: May 24th, 2018, 1:54 pm

Post Posted May 25th, 2018, 6:58 am

First of all, it cannot work in Internet Explorer, so you couldn't try it there - no WebRTC support in IE.

It can also be jerky if your bandwidth or the IP camera bandwidth is bad - maybe that's why it was jerky for you in Edge.
Edge's WebRTC support is still behind other browsers.
Try it with Chrome or Safari on iOS - the playback should be OK. We constantly see it OK in these browsers but always! jerky in Firefox - that's the problem.

malliz
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Post Posted May 25th, 2018, 3:42 pm

Sorry I accidentally opened two instances of edge. You are correct about IE but I think you saying it works fine in other browser is an oversimplification. Have you thought about filing a bug on bugzilla?
https://bugzilla.mozilla.org/
Not too many devs hang around here
What sort of man would put a known criminal in charge of a major branch of government? Apart from, say, the average voter.
"Terry Pratchett"

therube

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Post Posted May 28th, 2018, 9:29 am

FF52 works better then FF60, on my end.

Does not work in SeaMonkey, needs WebRTC.
Tried, https://addons.mozilla.org/en-US/seamon ... ui-toggle/.
Enabled the OpenH264 option in there, which it offered to "download" (though I don't think it did?), in any case, https://crash-stats.mozilla.com/report/ ... 7af0180528.

Pale Moon doesn't work.

Waterfox, & not checking back to back, seems no better then FF60.
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.19) Gecko/20110420 SeaMonkey/2.0.14 Pinball CopyURL+ FetchTextURL FlashGot NoScript

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