Basically, following instructions I prepared a config_site. PJSUA Command Line Interface (CLI) Manual Table of Contents PJSUA Command Line Interface (CLI) Manual Introduction Commands Root commands Call and related commands [call] IM and Presence commands [im] Account commands [acc] Conference and Media commands [audio] Status and config commands [stat] Video commands [video] Introduction CLI is a feature of pjsua that enables user to execute commands Dec 3, 2020 · Pjsip 的Conference 会议桥，主要的功能是抽象media的输入输出为 port，并把 port 中的PCM数据进行混音，已达到多方通话的混音功能。 对conference感兴趣的主要是两点： 怎么抽象 port 怎么混音 conference的代码位置：pjmedia/src/pjmedia/conference. id) error: Invalid value or argument Nov 25, 2025 · Asynchronous conference bridge operations (#3928): For PJMEDIA port implementation, PJMEDIA port must use its own pool to avoid premature destroy (for more info, see potential issue no 1 in PR desc). com/pjsip/pjproject/issues/1910 See also RTCP key frame request Video quality troubleshooting The conference bridge provides a simple but yet powerful concept to manage audio flow between the audio medias. To see examples side by side with old chan_sip config head to Migrating from chan_sip to res_pjsip. IMHO this is not clean next thing what i have to do is open sound device like methods: pjsua_conf_connect () or pjsua_set_snd The conference bridge provides powerful and very efficient mechanism to route the audio flow and mix the audio signal when required. If a pjsip callback is busy (you use it until a long task end) other callbacks won't trigger so it is impossible to make it work. a call) can transmit to multiple destinations, and one destination can receive from multiple sources. The principle is very simple; application connects audio source to audio destination, and the bridge makes the audio flows from that source to the specified destination, and that's it. Samples: Using Conference Bridge Sample to mix multiple files in the conference bridge and play the result to sound device. I am implementing Audio Conference Call in Android using Pjsip library v2. 7040803@wavearts. 2. BridgeAdd: Join a bridge that contains the specified channel. I recall using a null sound device connected to the bridge master port, not sure if this paradigm has changed. Default value: PJSUA_MAX_CONF_PORTS Apr 11, 2023 · pjsip音频流传递过程和混音算法_lincai2018的博客-爱代码爱编程_pjsip混音 2018-03-23 分类: 音视频 pjsip 对于实现voip，pjsip是一个非常优秀的开源项目。其实现了复杂的sip信令交互和音频的传输建立。 1、媒体流的传递过程 我们来结合代码分析下媒体流的传递。 conference. c conference在 Pjsip 的me Use pjsua’s cl (conference list) command from the pjsua ’s menu to check if the connection is made between the call and the sound device in the conference bridge. org) 1. The conference bridge provides powerful and very efficient mechanism to route the audio flow and mix the audio signal when required. The conference bridge provides powerful switching and mixing functionality for application. The principle is very simple, that is you connect audio source to audio destination, and the bridge will make the audio flows from the source to destination, and that’s it. k. It sounds like a gentle hissing or static sound, and it's constant regardless of whether people are talking or not. The main benefits of using the switchboard are its ability to handle encoded audio frames, its low latency, and higher performance. I don't suppose you have any stubbed-out examples? Also, does this mean that ultimately, the reverse phase port should be the only connected member of the conference bridge? res_pjsip Configuration Examples Below are some sample configurations to demonstrate various scenarios with complete pjsip. pjsip. With the conference bridge, each conference slot (e. This describes the video conference bridge implementation in PJMEDIA. However, the larger the value, the more computations are performed. Dial: Attempt to connect to another device or endpoint and bridge Group PJMEDIA_VID_CONF group PJMEDIA_VID_CONF Video conference bridge implementation destination. Sep 10, 2015 · 2015-09-10 08:15:08: @nanangizz created the issue on trac ticket 1884 Reported that in an audio call session, after disconnecting audio flow from microphone to call stream in conference bridge, rem May 30, 2018 · While Asterisk has supported the SIP MESSAGE method in both chan_sip and chan_pjsip for some time, with this enhancement, if a conference bridge participant (connected via chan_pjsip) sends an in-dialog MESSAGE to a conference bridge, the MESSAGE will be relayed to all other participants in the conference. When I try to access the remote audio media (port to the person we called) for example by trying to get the port Id, the whole programm crashes. teluu. h with the following flags: #define PJMEDIA_CONF_USE_SWITCH_BOARD 1 #define PJMEDIA_AUDIO_DEV_HAS_PORTAUDIO 0 #define PJMEDIA_AUDIO_DEV_HAS_SYMB_APS 1 #define PJMEDIA_HAS_PASSTHROUGH_CODECS 1 /* Only PCMA will be supported */ #define PJMEDIA_HAS_PASSTHROUGH_CODEC_PCMU 0 #define PJMEDIA_HAS_PASSTHROUGH_CODEC_PCMA 1 #define PJMEDIA_HAS The PJSIP Configuration Wizard (module res_pjsip_config_wizard) is a new feature in Asterisk 13. here. Your debug message show because, if you want to using conference bridge, you have to connect it to a sound device with following function (pjmedia_snd_port_create or pjmedia_snd_port_create_player). There are several types of video media objects supported in PJSUA2: Jun 30, 2024 · 文章浏览阅读2k次，点赞3次，收藏9次。本文深入分析了Pjsip的Conference模块，探讨了如何抽象Port并实现混音功能。Port的核心操作包括put_frame、get_frame和on_destroy。conference通过管理port并利用delay_buf解决录音与播放同步问题。混音通过pjmedia_conf_connect_port接口实现，源Port的PCM数据在get_frame中与目标Port的mix The Audio Conference Bridge ¶ The conference bridge provides a simple but yet powerful concept to manage audio flow between the audio medias. when mixing audio frames). Jun 30, 2024 · 文章浏览阅读1. Mar 3, 2016 · Multiple Call Handling using PJSIP — Asterisk Subject: Multiple Call Handling using PJSIP From: alaa@xxxxxxxxxxx (alaa) Date: Thu, 3 Mar 2016 10:47:35 +0200 In-reply-to: < 56D70283. Then,what is the use of creating a conference bridge and adding ports to it to conference calls. The problematic SDP section Below are some sample configurations to demonstrate various scenarios with complete pjsip. Since all media terminate in the bridge (calls, file player, file recorder, etc), the value must be large enough to support all of them. Feb 14, 2020 · Main focus of this release is: Video conference Darwin (Mac & iOS) native SSL backend NAT enhancement: TURN over TLS SIP multiple TCP/TLS listeners Among several bug fixes and enhancements, it includes important updates such as improved thread safety in PJSUA2 list objects (ticket #2189) and updated build configs for newer Android NDKs. John Smith. Just Play Bridge X The conference bridge provides powerful switching and mixing functionality for application. Audio switchboard is drop-in (compile-time) replacement for the Conference Bridge. . The * conference bridge provides powerful and very efficient mechanism to Check audio interconnection in the conference bridge Use pjsua’s cl (conference list) command from the pjsua ’s menu to check if the connection is made between the call and the sound device in the conference bridge. The video conference bridge shares the same principles as the audio conference bridge; application connects video source to video destination to allow video flow from that source to the specified destination, which in turn may also induce video mixing and duplicating operations. Apr 25, 2025 · The Conference Bridge is a fundamental component in PJMEDIA that enables multi-party audio communication. Sep 20, 2017 · Asterisk 15 now has multi-stream media capabilities that allow Asterisk to act as a selective forwarding unit with regards to video. Audio conference bridge implementation. Channels typically leave a bridge when the application that created the bridge is terminated (such as a conference leader ending a ConfBridge conference) or when the other side hangs up (such as in a two-party bridge created by Dial). conf: ;Baby Monitor . Beside avoiding deadlock, this change may improve performance a little bit as audio data processing in the conference bridge will be performed without holding a mutex. A pjmedia_port_put_frame() call by conference bridge to media stream will cause the media stream to encode the PCM frame with the chosen codec, pack it into RTP packet with its RTP session, update RTCP session, schedule RTCP transmission, and deliver the RTP/RTCP packets to the underlying media transport that was previously attached to the stream. g. Feb 21, 2018 · 2018-02-21 02:31:28: @mingteluu created the issue on trac ticket 2093 Receiving an SDP message body with an invalid media format description causes a segmentation fault. (http://www. conf is a flat text file composed of sections like most configuration files used with Asterisk. Check out this blog post for further details. Since there is already an ongoing PR at #4241, could you clarify how this PR relates to that one before we proceed with the review? In #3183, video conference bridge adopts asynchronous ports operations to handle non-uniform lock ordering issues. It implements the Session Initiation Protocol (SIP), media handling capabilities, and various network protocols to facilitate the development of VoIP applications, video communications, and instant messaging. Disk files (to players) and network connections (to recorders) works fine. Specify maximum number of media ports to be created in the conference bridge. Mar 3, 2016 · Multiple Call Handling using PJSIP — Asterisk Subject: Multiple Call Handling using PJSIP From: billg@xxxxxxxxxxxx (Bill Gardner) Date: Thu, 3 Mar 2016 10:59:26 -0500 In-reply-to: < 56D7FA27. c 1/* 2 * Copyright (C) 2008-2011 Teluu Inc. 4090604@apliman. The strictly sequential and single-threaded conference bridge of pjsip must service all connected ports within a single timer tick, inevitably leading to limitations on the number of serviced ports and high CPU performance requirements. h) . Thanks in advance. There are several types of video media objects supported in PJSUA2: that allows me to supply these callbacks as arguments, or do I have to create one in the PJMEDIA source? I'm still having trouble visualising how this actually works. cpp pjsua_conf_connect (id, sink. conf files. ConfBridge: Conference bridge application. i tryed this config in /etc/asterisk/extensions. BridgeWait: Put a call into the holding bridge. Busy: Indicate the Busy condition. The sampling rate, samples per frame, and bits per sample will be used for the internal operation of the bridge (e. ChanSpy: Listen to a channel, and optionally whisper into it. After hangup both conference ports are freed (I see this in mediaEnumPorts () output), when new call with new media and new player is made, it reuses previously freed ports on the bridge. When the audio media becomes inactive (for example when the call is put on hold), there is no need to stop the call’s audio media transmission since they will be removed automatically from the conference bridge, and this will automatically remove all connections to/from the call. This file is pjsip-apps/src/samples/confsample. John Graham 16 years ago I'm having a bit of trouble using the conference bridge with udp streams using the pjmedia API - I'd appreciate it if anyone can point me in the right direction. Conference Bridge Bidirectional Port Echo Cancellation Port Buffer Playback Capture to Buffer Null Port Resampling Port Multi-frequency/DTMF Tone Generator Audio Stream Video Stream WAV File Playback WAV Playlist WAV File Recorder Media channel splitter/combiner Clock provider PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. Contribute to AGProjects/python-sipsimple development by creating an account on GitHub. 0. c pjmedia_conf_remove_port则从会议桥中移除一个port Specify maximum number of media ports to be created in the conference bridge. May 22, 2025 · PJSIP is an open source multimedia communication library written in C that implements SIP (Session Initiation Protocol) and related protocols for voice, video, and instant messaging applications. It only happens when I GitHub Gist: instantly share code, notes, and snippets. Improving the performance of the PJSIP conference bridge has been a topic of growing interest recently. PJSUA Command Line Interface (CLI) Manual Table of Contents PJSUA Command Line Interface (CLI) Manual Introduction Commands Root commands Call and related commands [call] IM and Presence commands [im] Account commands [acc] Conference and Media commands [audio] Status and config commands [stat] Video commands [video] Introduction CLI is a feature of pjsua that enables user to execute commands Group PJMEDIA_CONF ¶ group PJMEDIA_CONF Audio conference bridge implementation. The conference bridge provides a simple but yet powerful concept to manage audio flow between the audio medias. The principle is very simple; application connects audio source to audio destination, and the bridge makes the audio flows from that source to the specified destination, and that’s it. Default value: PJSUA_MAX_CONF_PORTS When the audio media becomes inactive (for example when the call is put on hold), there is no need to stop the call’s audio media transmission since they will be removed automatically from the conference bridge, and this will automatically remove all connections to/from the call. Performance Optimization Table of Contents Performance Optimization Maximising performance Echo canceller Float vs fixed point Codec Avoid resampling Choose effective sampling rate Conference bridge vs audio switchboard Logging Threads Run-time checks Stack checks Safe module Unescape in-place Hash tolower Optimization Release mode How to configure pjsip to serve thousands of calls Maximising Nov 12, 2021 · pjsua_aud. com/pjsip/pjproject/issues/1937 Video conferencing https://github. It allows audio from multiple sources to be mixed and routed to multiple destinations with individual level control and flexible connection patterns. Jun 5, 2018 · pjsip conference分析_宝贝等等我的博客-爱代码爱编程 2019-07-03 分类: pjsip conference pjsip confer Pjsip的Conference会议桥，主要的功能是抽象media的输入输出为port，并把port中的PCM数据进行混音，已达到多方通话的混音功能。 Aug 12, 2021 · Hello, I have several errors after a reload from the GUI vitalpbx check-integrity corrected me some legal problems But after a restart the problem is still present Manager, i. 6. AMI (Asterisk Manager Interface), is an interface that enables remote management of the Asterisk telephone system. Create conference bridge with the specified parameters. Conf connect: 1 --> 0 It seems like the call is not getting connected to the conference bridge properly, but we dont know why. This describes the conference bridge implementation in PJMEDIA. What I have done is: Call A -> B Put B on hold Call A -> C Re-invite B The issue I am facing is, I can hear voice f PJSUA2 wraps together the signaling, media, and NAT traversal functionality into easy to use call control API, account management, buddy list management, presence, and instant messaging, along with multimedia features such as local audio and video conferencing, file streaming, local playback, and voice recording, and powerful NAT traversal Dec 1, 2018 · Bridge: Bridge two channels. Improved Performance While working on Local channel support a performance tweak was also done to the way that media flows through bridges. c . Configuration_ res_pjsip Configuration_ res_pjsip_acl Configuration_ res_pjsip_config_wizard Configuration_ res_pjsip_endpoint_identifier_ip Configuration_ res_pjsip_notify Configuration_ res_pjsip_outbound_publish Configuration_ res_pjsip_outbound_registration Configuration_ res_pjsip_phoneprov_provider Configuration_ res_pjsip_publish_asterisk MicroSIP is a portable SIP softphone based on the PJSIP stack available for Microsoft Windows operating systems. It facilitates high quality VoIP calls (p2p or on regular telephones) based on the open SIP protocol. May 24, 2018 · i am trying to get a Baby Monitor working with 2 phones on Asterisk (chan_pjsip) extensions. Check audio interconnection in the conference bridge Use pjsua’s cl (conference list) command from the pjsua ’s menu to check if the connection is made between the call and the sound device in the conference bridge. :-) Null port and master port are needed to drive the conference bridge and all media flow but I forget the details. org/trac/wiki/media-flow . While the basic chan_pjsip configuration objects (endpoint, aor, etc. PJSUA2 wraps together the signaling, media, and NAT traversal functionality into easy to use call control API, account management, buddy list management, presence, and Hi Mike, Yes I noticed the github link but didn't dig that far. Conference Bridge Bidirectional Port Echo Cancellation Port Buffer Playback Capture to Buffer Null Port Resampling Port Multi-frequency/DTMF Tone Generator Audio Stream Video Stream WAV File Playback WAV Playlist WAV File Recorder Media channel splitter/combiner Clock provider conference bridge. When I connect a wav_player to a stream, the audio comes through okay - only when I deinitialise I get a segfault. Some more information about the media flow when conference bridge is used is described in http://www. Explanations of the config sections found in each example can be found in PJSIP Configuration Sections and Relationships. Introduction to PJSUA2 PJSUA2 API is a C++ library on top of PJSUA-LIB API to provide high level API for constructing Session Initiation Protocol (SIP) multimedia user agent applications (a. library based on PJSIP stack (http://www. The conference bridge provides powerful and efficient mechanism to route the video flow and combine multiple video data from multiple video sources. Sample Applications View page source Sample Applications PJSUA2 Samples Below are some sample configurations to demonstrate various scenarios with complete pjsip. com > Aug 31, 2019 · When you make work to get an incoming call with the conference bridge, then try to use 2 threads to manage 2 different endpoints. com/pjsip/pjproject/issues/2181 Video conference bridge Video key frame transmission Key frame at the start of the call: https://github. * This describes the conference bridge implementation in PJMEDIA. Try to isolate Call/Account code creating custom classes and call from different threads. Do not only connect microphone to conference bridge. Please see… Now: I cannot find, in documentation or example/source code, how to connect a hardware device to the conference bridge. Each section defines configuration for a configuration object within res_pjsip or an associated module. FEATURES - Session Initiation Protocol (SIP) features: - Basic registration and call - Multiple accounts - Call hold, attended and unattended call transfer - Presence - Instant messaging - Multiple SIP accounts - Media features: - Audio - Conferencing - Narrowband and wideband Apr 25, 2025 · PJSIP is a comprehensive, high-performance, and open-source multimedia communication library written in C. and then when i want add call to my conference bridge i have to create port add it to my conference bridge and remove call from default conference bridgefor this i need internal structure pjsua (pjsua_internal. conf and Specify maximum number of media ports to be created in the conference bridge. GitHub Gist: instantly share code, notes, and snippets. Group PJMEDIA_CONF ¶ group PJMEDIA_CONF Audio conference bridge implementation. ) allow a great deal of flexibility and control they can also make configuring standard scenarios like trunk and user more complicated than similar scenarios in sip. Sometime try to connect player to media fails with following error: media. a Voice over IP/VoIP softphones). Attach rec port to conference bridge and do some routing with pjmedia_conf_connect_port. Thank you for submitting the PR. Integrating libyuv See https://github. Group PJMEDIA_CONF group PJMEDIA_CONF Audio conference bridge implementation. I wonder why,does anyone has any idea about this and how could we increase the number of users conferencing Also if conference can be achieved by the following method mentioned above. Given the WAV file is created and has the right amount of silence, then it seems that media is flowing the media port. This is a very important element that allows for automation and remote control of the system. pjsip. c模块是用来做音频设备和媒体数据流 Aug 26, 2024 · However, when a call is made from the SIP softphone to the PJSIP account, the PJSIP client immediately sends a 603 Decline response when attempting to answer the call. This PR integrates the same mechanism for audio conference bridge. com > SIP SIMPLE implementation for Python. Use pjsua’s cl (conference list) command from the pjsua ’s menu to check if the connection is made between the call and the sound device in the conference bridge. As an example, consider the following output: Oct 14, 2020 · This has now been added allowing Local channels to be put in between a PJSIP channel and a video conference bridge without any issue. a […] Apr 25, 2025 · PJSIP is a comprehensive, high-performance, and open-source multimedia communication library written in C. 3k次，点赞19次，收藏18次。在分析问题前，我们先要对会议桥 (conference bridge)有个基本认识。从上图可以看出，会议桥起到一个承上启下的作用，是媒体设备与媒体流之间的交换重点。很显然，从设备到会议桥有个 sound device port 的对于 pjmeida_port 的实现，这里需要我们关注下。有了 Jun 30, 2024 · pjmedia_conf_add_port， 这个函数的目的是： Add stream port to the conference bridge 从pjmedia_conf_add_port函数的实现来看，入口参数strm_port必须是已经存在的pjmedia_port实例 源码提供了一个通过会议桥混音的例子confbench. One could even go so far as to say that it is a kind of CTI (Computer Telephony Integration), i. com) PJSUA-LIB (or application) creates a conference bridge (pjmedia_conf) during initialization, and normally would retain this throughout the life time of the application. e.

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