Hi George, maybe we can make upgrade the audio/video sample application to SWF11 to have a quick look at all the feature currently available in flash player. We have such an sampler application, that has a checkbox for all the available settings where you can make a simple 1:1 call via Red5 and test everything.
I think this should be done upfront. Otherwise its more a mystical thing that happens inside the application. If it works in the sampler it will/should work in OpenMeetings. Sebastian 2012/10/9 George Kirkham <gkirk...@co2crc.com.au> > Maxim,**** > > Adobe Flash will only handle Echo Cancellation if the client side Flash > Application calls Flash’s “Enhanced audio API”.**** > > I would *greatly recommend* that OpenMeetings should implement Echo > Cancellation, if possible via Flash since this is the platform that > OpenMeetings is currently using. The current Echo issue of means that we > only use OpenMeetings for its whiteboard and Video sharing.**** > > > http://www.adobe.com/devnet/flashplayer/articles/acoustic-echo-cancellation.html > **** > > In addition to acoustic echo cancellation, enhanced audio also provides > noise suppression. Previously, Flash Player only provided noise suppression > for Speex audio. The new noise-suppression scheme is applied to all > captured audio samples. Noise suppression is controlled by the > already-existing noiseSuppressionLevel property of the Microphone class and > is enabled by default. Setting noiseSuppressionLevel to 0 will disable > noise suppression.**** > > *Enhanced audio has a couple of limitations:* > > •You cannot use enhanced and non-enhanced audio at the same time.**** > > •You can only use a single enhanced audio capture at any given time.**** > > Operation of enhanced audio is controlled by the enhancedOptions property > on your Microphone object and the MicrophoneEnhancedOptions class. The > class has the following properties:**** > > •MicrophoneEnhancedOptions.mode selects the operation mode for enhanced > audio. For possible values, please see the MicrophoneEnhancedMode class. > The default value is MicrophoneEnhancedMode.HALF_DUPLEX for USB capture > devices and MicrophoneEnhancedMode.FULL_DUPLEX otherwise.**** > > •MicrophoneEnhancedOptions.echoPath specifies the echo path length (in > milliseconds). A longer echo path means better echo cancellation but also > introduces longer delays and requires more processing power. The default > value is 128; the only other possible value is 256.**** > > •MicrophoneEnhancedOptions.nonLinearProcessing specifies whether to use > non-linear processing to suppresses residual echo. A time-domain technique > is used; the default value is enabled.**** > > ** ** > > ** ** > > ** ** > > Thanks,**** > > ** ** > > George Kirkham**** > > ** ** > > ** ** > > *From:* Maxim Solodovnik [mailto:solomax...@gmail.com] > *Sent:* Tuesday, 9 October 2012 3:44 PM > > *To:* openmeetings-user@incubator.apache.org > *Subject:* Re: Sound issue on laptop due to lack of Acoustic Echo > Cancellation (AEC) that is available in Adobe Flash 10/11**** > > ** ** > > I always thought that Flash performs echo cancellation, encodes the sound > and then send it to the client.**** > > But I'm not really familiar with this.**** > > Hopefully Sebastian or Timur can answer this**** > > ** ** > > On Tue, Oct 9, 2012 at 10:33 AM, George Kirkham <gkirk...@co2crc.com.au> > wrote:**** > > Maxim,**** > > **** > > Selecting “echo cancelation checkbox in Flash settings” does not make any > difference because the corresponding client side code is not implemented in > OpenMeetings. At least not to my knowledge.**** > > **** > > Skype has implemented AEC via flash, which is why Echo is an issue for > OpenMeetings even with the Echo cancellation checkbox set, but not an issue > for Skype.**** > > **** > > Please correct me if I am wrong.**** > > **** > > Thanks,**** > > **** > > George Kirkham**** > > **** > > **** > > **** > > *From:* Maxim Solodovnik [mailto:solomax...@gmail.com] > *Sent:* Tuesday, 9 October 2012 2:20 PM > *To:* openmeetings-user@incubator.apache.org > *Subject:* Re: Sound issue on laptop due to lack of Acoustic Echo > Cancellation (AEC) that is available in Adobe Flash 10/11**** > > **** > > video components are currently in SWF10**** > > try rclick and check echo cancelation checkbox in Flash settings**** > > On Tue, Oct 9, 2012 at 6:50 AM, George Kirkham <gkirk...@co2crc.com.au> > wrote:**** > > Jean-Marie,**** > > **** > > Sadly the sound issue on laptop is due to lack of Acoustic Echo > Cancellation (AEC) that is available in Adobe Flash 10/11 but is not as yet > implemented in OpenMeetings. Currently the only solution is to use > headphones or speakerphones that support AEC. Examples of hardware which > uses AEC are Logitech BCC950 ConferenceCam, ClearOne Chat 60-U, and the > Jabra SPEAK410.**** > > **** > > When I spoke to Sebastian about the problem of echo, he replied;**** > > “compiling the SWF10 to SWF11 should not require so much of a code > change, it is more a build environment configuration task. > I don't think we will transform the SWF8 code to AS3, we rather will > concentrate on DHTML.”**** > > **** > > I am not sure if any changes have yet been made to resolve the echo issue. > But I sure wish it was resolved.**** > > **** > > Thanks,**** > > **** > > George Kirkham**** > > **** > > IT Manager**** > > Cooperative Research Centre For Greenhouse Gas Technologies (CO2CRC) **** > > NFF House, 14 - 16 Brisbane Avenue, Barton, ACT, 2600, Australia**** > > T: (02) 6120 1600**** > > F: (02) 6273 7181**** > > E: gkirk...@co2crc.com.au, **** > > W: www.co2crc.com.au**** > > **** > > **** > > *From:* Jean-Marie Landri [mailto:jeanmarielan...@gmail.com] > *Sent:* Tuesday, 9 October 2012 4:11 AM > *To:* openmeetings-user@incubator.apache.org > *Subject:* Sound issue on laptop**** > > **** > > **** > > When using skype, there is no probleme at all !**** > > But when using OpenMeeting, I can hear my voice on others microphone and it > become VERY loud !**** > > I need to praticly shut down my speaker, but then I cannot hear other peaple > talk !**** > > **** > > Everything works fine on Skype, why isn't it working on Open Meeting ?**** > > It feels like everyone should wear a headset !**** > > **** > > Thank you very much,**** > > > > **** > > **** > > -- > WBR > Maxim aka solomax**** > > > > **** > > ** ** > > -- > WBR > Maxim aka solomax**** > -- Sebastian Wagner https://twitter.com/#!/dead_lock http://www.webbase-design.de http://www.wagner-sebastian.com seba.wag...@gmail.com
