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..., three bytes of payload length four bytes of timestamp and three bytes of stream ID. The first byte of the payload for audio message is the format byte and the rest of the byte is the payload. Jozsef ----- Original Message ---- From: Jeff Ramin <jeff.ramin at singlewire.com> To: Jozsef Vass <jozsef_vass at yahoo.com> Cc: speex-dev at xiph.org Sent: Wed, November 18, 2009 6:09:56 AM Subject: Re: jspeex question Is there a document somewhere that describes speex-encoded FLV files? What is a TC message? Thanks. Jozsef Vass wrote: > FLV contains TC messages? TC message paylo...

..._ctl(speexState, SPEEX_GET_SAMPLING_RATE, &speexRate); SpeexPreprocessState* speexPreprocessState = speex_preprocess_state_init(speexFrameSize, speexRate); Jozsef -----Original Message----- From: Max Lapshin [mailto:max.lapshin at gmail.com] Sent: Thursday, March 18, 2010 10:57 PM To: Jozsef Vass Cc: speex-dev at xiph.org Subject: Re: [Speex-dev] Speex in flash player: how to work with? On Fri, Mar 19, 2010 at 3:27 AM, Jozsef Vass <jovass at adobe.com> wrote: > First of all, Flash Player can only publish Speex at 16 kHz. 20 ms of audio (320 samples) will result in compressed paylo...

...eeded to take each audio tag from the FLV file and feed the contents of the tag (except for the first byte) to the jspeex decoder and write the results to a file. Jozsef - it is possible to specify 8KHz in the flash client and decode it as such. Speex definitely does not need to be 16KHz. Jozsef Vass wrote: > The link is http://www.adobe.com/devnet/rtmp/. TC Message stands for TinCan message. It is 11 bytes long, first byte is message type, three bytes of payload length four bytes of timestamp and three bytes of stream ID. > > The first byte of the payload for audio message is the for...

What are you trying to accomplish? My code sample was about how Flash Player microphone input in speex. If you want to do decode, please see speexdec.c Jozsef -----Original Message----- From: Max Lapshin [mailto:max.lapshin at gmail.com] Sent: Tuesday, March 30, 2010 8:53 AM To: Jozsef Vass Cc: speex-dev at xiph.org Subject: Re: [Speex-dev] Speex in flash player: how to work with? On Sat, Mar 20, 2010 at 12:04 AM, Jozsef Vass <jovass at adobe.com> wrote: > Nicer way: > > void* speexState = speex_encoder_init(&speex_wb_mode); > int speexFrameSize, speexRate; >...

First of all, Flash Player can only publish Speex at 16 kHz. 20 ms of audio (320 samples) will result in compressed payload size of 106 bytes (42.4 kbps). When Flash Player sends a TC message, there is 11 bytes TC message header and a single byte of audio message header. For more information, please see ActionScript 3 reference http://help.adobe.com/en_US/AS3LCR/Flash_10.0/ Jozsef

FLV contains TC messages? TC message payload contains a format byte and speex frames (up to eight). In the format byte 0xb0 indicates speex. Speex is always 16 kHz, 16 bit, mono. Jozsef Message: 1 Date: Mon, 16 Nov 2009 14:40:20 -0600 From: Jeff Ramin <jeff.ramin at singlewire.com> Subject: [Speex-dev] jspeex question To: speex-dev at xiph.org Message-ID: <4B01B8B4.8020904 at

Hi Jozsef, this approach sounds interesting. Do have you have some source code available ? Thanks Mark -----Original Message----- From: speex-dev-bounces at xiph.org [mailto:speex-dev-bounces at xiph.org] On Behalf Of Jozsef Vass Sent: Friday, September 25, 2009 11:43 PM To: mark_schilling at gmx.de Cc: speex-dev at xiph.org Subject: Re: [Speex-dev] High CPU usage I have run into the same issue. Before sending a frame to encoder, I calculate the energy. If it is less than a small threshold, I simply replace this frame with...

Hi Jean-Marc I am using speex in my voip app (wideband mode). I have noticed that when VAD kicks in, CPU considerably increases (bitrate decreases to 4 kbps). It takes about 7 ms to encode one frame versus 0.5 ms (for speech). This happens regardless preprocessor is used. Although the issue seems to be driver dependent, it occurs on XP, Vista and Mac OS X. Besides complexity and quality, this

Sounds strange. Can you reproduce the problem with speexenc/speexdec? If so, can you send a short file that triggers that along with the exact command line? Jean-Marc Jozsef Vass a ?crit : > Hi Jean-Marc > > I am using speex in my voip app (wideband mode). I > have noticed that when VAD kicks in, CPU considerably > increases (bitrate decreases to 4 kbps). It takes > about 7 ms to encode one frame versus 0.5 ms (for > speech). This happens regardless pr...

I have run into the same issue. Before sending a frame to encoder, I calculate the energy. If it is less than a small threshold, I simply replace this frame with "silence frame," which is 320 random samples of values smaller than 3 (16 kHz). BTW, I have only experience this problem with certain USB headsets that provide you all 0 samples when muted. Jozsef

...ds deliver all 0 samples when no microphone is connected. Using FIXED_POINT solved it. But what are the drawbacks of FIXED_POINT in comparison to FLOATING_POINT? Mark -----Urspr?ngliche Nachricht----- Von: speex-dev-bounces at xiph.org [mailto:speex-dev-bounces at xiph.org] Im Auftrag von Jozsef Vass Gesendet: Freitag, 25. September 2009 23:43 An: mark_schilling at gmx.de Cc: speex-dev at xiph.org Betreff: Re: [Speex-dev] High CPU usage I have run into the same issue. Before sending a frame to encoder, I calculate the energy. If it is less than a small threshold, I simply replace this frame wi...

Is there a document somewhere that describes speex-encoded FLV files? What is a TC message? Thanks. Jozsef Vass wrote: > FLV contains TC messages? TC message payload contains a format byte and speex frames (up to eight). In the format byte 0xb0 indicates speex. Speex is always 16 kHz, 16 bit, mono. > > Jozsef > > > Message: 1 > Date: Mon, 16 Nov 2009 14:40:20 -0600 > From: Jeff Ramin...

On Sat, Mar 20, 2010 at 12:04 AM, Jozsef Vass <jovass at adobe.com> wrote: > Nicer way: > > void* speexState = speex_encoder_init(&speex_wb_mode); > int speexFrameSize, speexRate; > speex_encoder_ctl(speexState, SPEEX_GET_FRAME_SIZE, &speexFrameSize); > speex_encoder_ctl(speexState, SPEEX_GET_SAMPLING_RATE, &amp...

rtmplite -- http://code.google.com/p/rtmplite/ -- can be used to record Speex .flv audio and a/v files from Flash/Flex applets, and ffmpeg can be used to extract the Speex audio from such files, which can also be replayed on Flash. > Date: Tue, 23 Aug 2011 14:53:52 -0700 > From: Jozsef Vass <jovass at adobe.com> > > The only way to do this is to publish from Flash Player and record on Flash Media Server. There is no tooling support. > > Jozsef > > Date: Mon, 22 Aug 2011 20:01:08 -0400 > From: flash man <fm369495 at gmail.com> > Subject: [Speex-dev]...

Hi All, Actually, the question is right on the topic. Is it possible to change the quality while encoding ? If the answer is yes, does the jitter buffer provides info about latency, e.g. : if latency is too high, we lower down the quality, if the latency is okay, we are raising the quality until latency rise up again... Thank you for your help. Morgan

...i Jozsef, > > this approach sounds interesting. > Do have you have some source code available ? > > Thanks > > Mark > > -----Original Message----- > From: speex-dev-bounces <at> xiph.org [mailto:speex-dev-bounces <at> > xiph.org] On Behalf Of Jozsef Vass > Sent: Friday, September 25, 2009 11:43 PM > To: mark_schilling <at> gmx.de > Cc: speex-dev <at> xiph.org > Subject: Re: [Speex-dev] High CPU usage > > I have run into the same issue. Before sending a frame to encoder, I > calculate the energy. If it is less than...

Flash player encodes speex at 16 kHz, mono, 16 bit. Fields in the format byte should be ignored if the format is speex. You can set the quality by Microphone.encodeQuality (default 6). You can also set the number of speex frames per tc message using Microphone.framesPerPacket. Flash player can only decode speex at 16 kHz, so make sure you have the proper sample rate. Jozsef > > Message:

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Flash does support interactive audio/video, not only streaming. And there is a new protocol called RTMFP in flash 10, which is on top of UDP. For voice application, see Connect Now (www.acrobat.com) Jozsef Message: 2 Date: Fri, 03 Oct 2008 16:54:53 +0200 From: Tor-Einar Jarnbjo <tor-einar at jarnbjo.name> Subject: Re: [Speex-dev] Fwd: [Vorbis-dev] Flash Vorbis player To: Ivo Emanuel

Adobe Flash Player includes wideband speex encoder. Jozsef Message: 4 Date: Mon, 12 Apr 2010 06:20:54 -0700 (PDT) From: messaging bay <support at messagingbay.com> Subject: [Speex-dev] About speex quality To: speex-dev at xiph.org Message-ID: <167505.77606.qm at web1104.biz.mail.sk1.yahoo.com> Content-Type: text/plain; charset=us-ascii Hi Who can give me list of companies or VoIP