[gst-devel] Theora w/ farsight2

[Miron Kunz]

Hi,

So I came to the conclusion that latency caused by encoder and network are destroying my Fs2/Theora video on the receiving end.

With high (for ex 1/15) fps encoder drops many buffers and does not try to lower fps to adjust to CPU capabilities.

Thanks,
Mironoz

> 
> Hi,
> All my video/audio sinks on receiving end have sync=false. The sending part is handled by Farsight2 and it looks like sync=false is set there too.
> 
> Thanks,
> Mironoz
> 
> > 
> > Hi ,
> > 
> > Use "sync=false" property with both the sinks at sending and receiving end , and then see the behaviour . 
> > 
> > 
> > 
> > 2010/7/14 Miron Kunz <mironoz at mail.ru>
> > Hi,
> > 
> > My problem seems to be related to Theora encoder.
> > 
> > With the number of discontinued buffers increasing I am likely to get distorted image on the receiving end:
> > 
> > 0:01:55.343750000 4492 00DF2698 DEBUG theoraenc gsttheoraenc.c:829:theora_enc_is_discontinuous:<theoraen
> > c4> Incoming TS 0:01:50.345187500 exceeds expected value 0:01:48.955312500 by too much, marking discontinuity
> > 
> > If I increase threshold for late/discontinued buffers - the receiving end shows video w/o artifacts.
> > 
> > I am not sure yet how to interpret the observation because I see discontinued buffers in this pipeline which still produces the fine video:
> > gst-launch --gst-debug="theoraenc:5" dshowvideosrc!ffmpegcolorspace!theoraenc!theoradec!ffmpegcolorspace!directdrawsink
> > 
> > One more thing - on every discontinued packet, the theora codec is deallocated and reincarnated again by theora_enc_reset(). For performance sake it looks suspicious to me.
> > 
> > Thanks,
> > Miron
> > 
> > 
> > 
> > 
> > 
> > 
> > >
> > > Hi,
> > >
> > > I updated to Farsight2, 0.0.20
> > > set VER_GST=0.10.29
> > > set VER_GST_PLUGINS_BASE=0.10.29
> > > set VER_GST_PLUGINS_GOOD=0.10.22
> > >
> > >
> > > But I am still getting distorted video when Theora codec is used.
> > >
> > > Looks like frames between I-frames are not properly decoded.
> > >
> > > Anything I can check?
> > >
> > > Thanks,
> > > Mironoz
> > >
> > >
> > >
> > > > Hi,
> > > >
> > > > I am using Theora codec w/ farsigh2 (no Telepathy) for video conferencing and I am facing distorted video on the receiving end when using camera with relatively high resolution on the sending end. Low resolution streams are decoded alright by the receiver. I ran receiver/sender on the same host so the bandwidth should not be a problem. CPU consumption was low too.
> > > > The artifacts in the video I see most often are small squares(up to 16x16 or so pixels) with 2 white and 1 black stripes in it.
> > > >
> > > > Here is versions of the gstreamer/farsight2 I am using:
> > > >
> > > > set VER_GST=0.10.25
> > > > set VER_GST_PLUGINS_GL=0.10.1
> > > > set VER_GST_PLUGINS_BASE=0.10.25
> > > > set VER_GST_PLUGINS_GOOD=0.10.17
> > > > set VER_GST_PLUGINS_UGLY=0.10.13
> > > > set VER_GST_PLUGINS_BAD=0.10.17
> > > > Farsight2 0.0.16
> > > >
> > > > I read on this list about incompatibilities between certain versions of the Fs and gstreamer. I wonder if I am running in it here or it is something else.
> > > >
> > > > Thanks,
> > > > Miron
> > >
> > >
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> > 
> > -- 
> > Regards,
> > 
> > Sudarshan Bisht
> 
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