[h323plus] [Opalvoip-devel] error H.263

Simon Horne s.horne at packetizer.com
Tue Feb 22 21:17:31 EST 2011


Robert 

You can also use the PTLIB_TRACE_CODECS environmental variable. 
Found it enormously helpful debugging the X264 encoder.

Simon

-----Original Message-----
From: Robert Jongbloed [mailto:robertj at voxlucida.com.au] 
Sent: 23 February 2011 11:55
To: 'Simon Horne'; 'Jan Willamowius'; opalvoip-devel at lists.sourceforge.net
Cc: h323plus at lists.packetizer.com
Subject: RE: [Opalvoip-devel] error H.263

The OPAL infrastructure is fine and all this works perfectly with the IPP
codecs (and another private H.264 implementation) for both SIP and H.323
operation.

I just wanted confirmation that the bit rate control was working in the
helper app, as a breakpoint at the right place showed the bit rate and frame
rate where correctly negotiated and passed to helper app via the
SET_FRAME_RATE/SET_TARGET_BITRATE commands.

Gotta dig deeper ...

Robert Jongbloed
OPAL/OpenH323/PTLib Architect and Co-founder.


> -----Original Message-----
> From: Simon Horne [mailto:s.horne at packetizer.com]
> Sent: Tuesday, 22 February 2011 8:38 PM
> To: 'Jan Willamowius'; opalvoip-devel at lists.sourceforge.net
> Cc: h323plus at lists.packetizer.com
> Subject: Re: [Opalvoip-devel] error H.263
> 
> Jan
> 
> You are correct . To match to a bandwidth the encoder must know frame 
> size and rate. The plugin support is very much h323plus specific. You 
> can calculate the frame size/rate by using the internal table or can 
> use a supplied list of supported frame sizes/rates. These can be 
> manually coded from largest to smallest or retrieved from the video input
device.
> DirectShow for instance supports retrieving the list of supported 
> sizes
and
> rates via calling PVideoInputDevice:: GetDeviceCapabilities().
> 
> These can be passed to the codec via calling 
> PLUGINCODEC_CONTROL_SET_FORMAT_OPTIONS.  In h323plus the function to 
> do
this
> is H323VideoCodec::SetSupportedFormats. The function returns the 
> default frame size and rate for the given bitrate that is supported by 
> the input device. Then you can set the input device with the returned 
> frame size
/rate
> in the MyH323Endpoint::OpenVideoChannel. See Applications/SimplePlus 
> for example of how that is done.
> 
> The bandwidth (and level\MBPS etc) values for the X264 Encoder is set 
> by PLUGINCODEC_CONTROL_SET_CODEC_OPTIONS which is called after the 
> local and remote capabilities have been merged in h323plus.
> 
> Then there is flowControl which does basically the same thing. You 
> pass to the plugin a bitrate value via 
> PLUGINCODEC_CONTROL_FLOW_OPTIONS it then returns a supported frame 
> size/rate (internal or supplied earlier) then
you
> pass these value to the input device via calling PVideoInputDevice::
> FlowControl().
> 
> The architecture of Opal has deviated a lot from its h323plus roots 
> and I think there is a lot more things to consider to getting this to 
> work with it.
> 
> Simon
> 
> -----Original Message-----
> From: Jan Willamowius [mailto:jan at willamowius.de]
> Sent: 22 February 2011 18:46
> To: opalvoip-devel at lists.sourceforge.net
> Subject: Re: [Opalvoip-devel] error H.263
> 
> When I debugged a similar bandwidth issue on H323Plus a few months 
> ago, I found that the bit rate setting was passed to the encoder 
> correctly, but
to
> correctly meet this target the encoder needs to know the correct 
> values of influencing parameters, like the frame rate.
> In my case the frame rate wasn't passed in correctly, so the encoder 
> kept producing video at the wrong rate.
> 
> I haven't fixed the issue back then, but worked around it. I'm not 
> sure if anybody else has (or if the same applies to the OPAL version 
> of the
codec).
> 
> Regards,
> Jan
> 
> Robert Jongbloed wrote:
> > Quick question on this helper app, do you know if the bit rate 
> > control works with it?
> >
> >
> >
> > As far as I can tell, I am setting it to 256kbps and it is still 
> > sending at 4Mbps. So, before I go digging deeper, I was hoping for a 
> > bit of a sanity check.
> >
> >
> >
> > Thank you very much!
> >
> >
> >
> > Robert Jongbloed
> >
> > OPAL/OpenH323/PTLib Architect and Co-founder.
> >
> >
> >
> > From: Simon Horne [mailto:s.horne at packetizer.com]
> > Sent: Monday, 7 February 2011 10:01 PM
> > To: 'Robert Jongbloed'; 'ZAHRA dehghanianfard'
> > Cc: 'opal'; 'opal'; h323plus at lists.packetizer.com
> > Subject: RE: error H.263
> >
> >
> >
> > I think both the opal and h323plus community can benefit.
> >
> > http://www.h323plus.org/source/download/ffmpeg_x264.zip
> >
> >
> >
> > Place all files in your application directory.
> >
> > The FFMPEG (with w32threads) and X264 is built with mingw/msys.
> > x264plugin_helper.exe is built with vs2008 and requires vs2008 runtime.
> >
> >
> >
> > Simon
> >
> >
> >
> > From: Robert Jongbloed [mailto:robertj at voxlucida.com.au]
> > Sent: 07 February 2011 15:48
> > To: ZAHRA dehghanianfard
> > Cc: opal; opal
> > Subject: Re: [Opalvoip-devel] error H.263
> >
> >
> >
> > The answer to your questions are:
> >
> >
> >
> > 1) Yes, but you need to compile it.
> >
> > 2) The result of compiling it is a DLL
> >
> > 3) You will have to figure out why it doesn't compile under windows.
> >
> >
> >
> >
> >
> > I have to admit to not being able to get the H.263 (or x264) codecs 
> > to compile and work under Windows, though I have only tried somewhat
briefly.
> > Unfortunately the authors of all the libraries mainly use Linux, 
> > though it is my understanding that it can be compiled using
MinGW/Cygwin.
> >
> >
> >
> >
> >
> > I am sure the OPAL community would be incredibly grateful to anyone 
> > that can provide a pre-built binary for the H.263 (and x264!) codec.
> >
> >
> >
> >
> > --------
> >
> > Robert Jongbloed
> >
> > Vox Lucida Pty. Ltd.
> >
> >
> >
> >
> >
> >
> >
> > On 03/02/2011, at 5:33 PM, ZAHRA dehghanianfard wrote:
> >
> >
> >
> >
> > Hi robert.
> >
> > Many thanks for your last support; I need to use OpenPhone3.8.2 by
> > H.263 codec run.
> >
> > 1)      Is OpenPhone 3.8.2 with Opal 3.8.2 & Ptlib2.8.2 support H.263
> codec
> > inside?
> >
> > 2)      If the above response is YES, Are you suggesting any H.263 DLL
> file?
> >
> > 3)      I find a source that name is "H.263-1998" then I download that
and
> > compiles it but I find below Error inside:
> >
> >
> >
> > 1>------ Build started: Project: H.263-1998 (FFMPEG) Video Codec,
> > Configuration: Debug Win32 ------
> > 1>Compiling...
> > 1>h263pframe.cxx
> > 1>c:\opal\plugins\video\h.263-1998\../common/ffmpeg.h(155) : fatal 
> > 1>error
> > C1083: Cannot open include file: 'libavcodec\avcodec.h': No such 
> > file or directory
> > 1>h263-1998.cxx
> > 1>c:\opal\plugins\video\h.263-1998\../common/ffmpeg.h(155) : fatal 
> > 1>error
> > C1083: Cannot open include file: 'libavcodec\avcodec.h': No such 
> > file or directory
> > 1>Generating Code...
> > 1>Build log was saved at
> > "file://c:\opal\plugins\Debug\H263-1998\BuildLog.htm
> > <file:///c:\opal\plugins\Debug\H263-1998\BuildLog.htm> "
> > 1>H.263-1998 (FFMPEG) Video Codec - 2 error(s), 0 warning(s)
> > ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped 
> > ==========
> >
> >
> >
> > I try to solve this problem by download a "libavcodec" that use some 
> > header & DLL file that I copy in "C:\opal\plugin\video\common" but I 
> > take below
> > error:
> >
> >
> >
> >
> >
> > 1>------ Build started: Project: H.263-1998 (FFMPEG) Video Codec,
> > Configuration: Debug Win32 ------
> > 1>Compiling...
> > 1>h263pframe.cxx
> > 1>c:\opal\plugins\video\h.263-1998\../common/ffmpeg.h(185) : fatal 
> > 1>error
> > C1189: #error :  Libavcodec LIBAVCODEC_VERSION_INT too old.
> > 1>h263-1998.cxx
> > 1>c:\opal\plugins\video\h.263-1998\../common/ffmpeg.h(185) : fatal 
> > 1>error
> > C1189: #error :  Libavcodec LIBAVCODEC_VERSION_INT too old.
> > 1>Generating Code...
> > 1>Build log was saved at
> > "file://c:\opal\plugins\Debug\H263-1998\BuildLog.htm
> > <file:///c:\opal\plugins\Debug\H263-1998\BuildLog.htm> "
> > 1>H.263-1998 (FFMPEG) Video Codec - 2 error(s), 0 warning(s)
> > ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped 
> > ==========
> >
> >
> >
> > Please guide me to i can have H.263 codec with DLL & source over 
> > OpenPhone
> > 3.8.2 here.
> >
> > I am in wait for your response.
> >
> > Best Regards.
> >
> > Zahra.
> 
> --
> Jan Willamowius, jan at willamowius.de, http://www.gnugk.org/
> 
>
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