similar to: Encoding/Decoding doubts

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 format byte and the rest of the byte is the payload. Jozsef ----- Original Message ---- From: Jeff Ramin <jeff.ramin

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

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, &speexRate); SpeexPreprocessState* speexPreprocessState = speex_preprocess_state_init(speexFrameSize, speexRate); Jozsef -----Original Message----- From: Max

Hi, I'm doing a VoIP related project where at some point i need to decode speex data gathered from a flash client, and then encode it to ulaw or alaw pcm so i can send it in rtp packets. On the other way, i get rtp packets with ulaw and alaw pcm data, then i need to decode them to linear pcm and feed the speex encoder, so i can send the data to the flash player. I'm using JSpeex, i know

Thanks for the help folks, but I got this working a couple hours ago. =) I'm quite please after struggling with it for a few days. I just needed 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

hello, i have a simple question about speex frame size. i work with jspeex - but i think it's speex generic, the question i have. can i use any frame size i want? or does the size have be in a certain ratio to other numbers? and what does the frame size in the decoder mean? encoded or decoded packet frame size? how much data can i hand to the encoder to encode? if i hand i.e. 400 bytes to

Hi I am using Jspeex for my project which requires compression of audio in realtime..so far i managed to capture sound using java's sound.The capturing format i use is 8 bit 8khz ,stereo pcm.The captured sound is buffered and fed to encoder.Its fed to decoder,whose output is again buffered for sometime.But when i try to play it back i could hear sound only in right channel.Left channel is

hello, i switched to use the encoder.processData() and encoder.getProcessedData() of jspeex. however it looks to me like a memory leak ... memory usage is increasing very fast and there is no visible stop ... after about five minutes java.lang.OutOfMemory occurs. I think it must be the jspeex component, because before i added jspeex to my app usage was constant at about 5mb. is it possible

Hi, Vipin, What you're going to want to do here is convert your 8-bit stereo samples into 16-bit mono samples and back again when you're done(*). What you are actually doing here, it sounds like, is feeding 2 8-bit mono samples into Jspeex, which expects 16-bit mono. So, the most-significant-byte is in the right channel, and more or less gets encoded/decoded properly, but the

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

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

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 >

Anil Philip <goodnewsforyou at yahoo.com> wrote: see http://code.google.com/android It would be good of members from here will step in and offer google help to implement speex. Without exaggeration, android will transform the mobile world. Ivo Emanuel Gon?alves <justivo at gmail.com> wrote: On Fri, Apr 11, 2008 at 10:58 PM, Anil Philip wrote: > I recommended in a bug report that

Just an update, and a follow-up question: I'm making progress on this issue, and will likely have something working very soon, now that I understand how the jspeex transcoding classes work. Unfortunately, I will need to make a couple small changes to the jspeex source code. My question is - is anybody using jspeex for streaming speex-encoded audio? It works great for static audio, but seems

so, having a speex frame, how do i know where is each sample if i don't know how many bits per sample are being used. Isn't there any info besides the data ? On Wed, Jul 15, 2009 at 7:21 PM, Alexander Chemeris < Alexander.Chemeris at sipez.com> wrote: > Hi, > > Speex RTP payload does not have any header (except RTP header), > as per speex-rtp RFC. > > On Wed, Jul

I found the details: 44100hz, 16bits, stereo I am looking at rewriting the program to record at 8Khz/16Khz/32Khz mono only should I record at 44100hz (and convert down) or record at the required hz level? ----- Original Message ----- From: <speex-dev-request@xiph.org> To: <speex-dev@xiph.org> Sent: Thursday, June 14, 2007 3:44 AM Subject: Speex-dev Digest, Vol 37, Issue 19 >

Hi folks. The jspeex library has classes for converting speex to pcm and vice-versa. I also have other code that converts from G.711 to pcm (and vice-versa). I want to transcode G.711 to speex, using an input stream. Can I accomplish this in one step, or must I go G.711 -> PCM -> Speex? If possible in one step, is there some example code I could look at for reference? Thanks! -- Jeff

I have an audio file compressed by JSpeex that I'm trying to decompress on the iPhone. I've been trying to work from the speexdec example in an attempt to port the core logic to ObjC. I have a class that does the decode and passes the result back to another class. (currently the other class is a unit test.) My other class is writing the converted output to disk. I compare the results of my

Conrad Parker schrieb: > so perhaps patching the build to include libspeex is not technically > difficult. Of course it'd make more sense to access libspeex through > VoIP apps than just through the generic MediaPlayer interface. > Even if they included Speex support, the Android media API is very limited, as it can only access audio from a file or an HTTP URL. I raised a bug

Hi, Is real-time possible with the current java-based JSpeex for real-time full duplex voice communication? If yes, can you please also provide some details of the Wintel (Windows on Intel) specifications that you have used to achieve that, and perhaps the JSpeex encoding/decoding specs used? Thanks. Cheers, Jo Yew Everyone should have a big dream and live a meaningful life to its