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Re: Monitoring A/V sync issues and frame drops

From: Dee Cee <deeprcee@gmail.com>
Date: Fri, 22 Aug 2014 12:26:59 -0700
Message-ID: <CAPtn87NkZdD4kcWHFZ6+=9PnVSg2+HWv2j1X1iL0+gvm0j7dSQ@mail.gmail.com>
To: Varun Singh <vsingh.ietf@gmail.com>
Cc: "public-webrtc@w3.org" <public-webrtc@w3.org>
Varun - Thanks for your reply.
I do see many statistics in statscollector.
Some of them like bytes/packets sent are obvious but the other ones like
bucket delay, playout delay etc aren't so obvious at first look. It
requires some code digging which is going a bit slow.
Is there any documentation around what each statistic really mean ?

Thanks
Dee



On Wed, Aug 20, 2014 at 1:26 AM, Varun Singh <vsingh.ietf@gmail.com> wrote:

> Hi,
>
> Since you are discussing about chrome, there are some additional stats
> appended with a `goog` identifier in getStats() which may help (e.g.,
> frame playout time in ms compare that to the frame rate).
>
> There are additional stats discussed in the wiki
> (https://www.w3.org/2011/04/webrtc/wiki/Stats) but AFAIK they are not
> yet implemented by any browser. From those metrics, there are a few
> that may help with discerning A/V sync -- for example framesDropped,
> which are typically dropped from the jitter buffer because they will
> not make the intended playout time.
>
>
> -Varun
>
> On Tue, Aug 19, 2014 at 11:27 PM, Dee Cee <deeprcee@gmail.com> wrote:
> > Hi,
> >
> >
> >
> > We have a small application that uses webrtc to setup a call for video
> chat.
> >
> > Is there a good way to measure A/V sync issues, frame drops and audio
> > glitches from webrtc code ?
> >
> > I looked into chrome://webrtc-internal but did not find a suitable graph.
> >
> >
> > Thanks
> >
> > Dee
>
>
>
> --
> http://www.netlab.tkk.fi/~varun/
>
Received on Friday, 22 August 2014 19:27:26 UTC

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