Specific Guides

Audio

• Acoustic Echo Cancellation (AEC)
• Audio Frame Manipulation
• Audio Conference Bridge
• Customizing the Audio Stream Port
• Handling HW insertion/removal
• Intel IPP codecs integration
• Jitter buffer features and operations
• OpenCore AMR codecs integration
• Switchboard
• WebRTC integration

Audio Troubleshooting

• How to record audio with pjsua
• Audio is breaking up
• Audio drop-outs or “stutters”
• High jitter value observed by remote party
• Loud static noise
• No audio is heard in local speaker
• No audio is heard by remote party
• Reducing audio latency
• Soft/quiet noise
• Audio troubleshooting checklists

Build & Integration

• Adding FFMPEG support
• Mingw-w64

Development & Programming

• Group Lock
• Using thread with PJSUA initialization and shutdown
• PJSIP Guide
• Coding Style

Media

• Integrating Third Party Media Stack into PJSUA-LIB
• AI Connectivity
• Understanding Audio Media Flow
• RTCP Feedback
• Tone generator algorithms performance
• Transport Adapter

Network & NAT

• Handling IP address change
• IPv6 and NAT64 support
• Manual ICE Host Candidates
• Getting around blocked, filtered, or mangled VoIP network
• Getting around NAT (for media)
• QoS Support
• Using SIP TCP Transport
• Using ICE in non-SIP Applications
• Using Trickle ICE
• Troubleshooting ICE negotiation failure
• TURN over TCP and TLS
• UPnP NAT Traversal

Performance & Footprint

• Footprint Optimization
• ICE Heap Usage
• Performance Optimization
• Media Performance (MIPS test)

Security

• SIP Digest Authentication
• SRTP — Secure RTP (SDES and DTLS-SRTP)
• SSL/TLS

SIP

• PJSIP Guide
• Asynchronous SIP Authentication
• Busy Lamp Field (BLF) and Dialog Event
• Customizing SIP Messages
• Implement DNS SRV failover
• DTMF
• Real-Time Text (RFC 4103)
• Processing redirection (3xx) response
• Reducing SIP message size
• Account-Scoped Server Affinity
• TCP/TLS Transport
• URI Escaping

Video

• Sample Applications with Video
• Modifying Video Codec Parameters
• Video Conference
• Audio/Video Synchronization
• Setting Video Capture Orientation
• Video Keyframe Transmission
• Video Best Practices
• Video Components and Backends

Video Troubleshooting

• Choppy / frozen / blocky video
• Green frames
• “Invalid video device” / no preview
• Network / IP change leaves video black
• Lipsync drift
• Low video quality despite good network
• Mobile: video stops after backgrounding
• No video at peer (persistent black)
• Reducing video latency
• Video troubleshooting checklists

Other

• PJSUA Command Line Interface (CLI) Manual
• iOS Push Notifications
• Logging and Diagnostics for Issue Reports
• Writing guide