Introduction
This guide helps you diagnose and resolve audio-video synchronization issues during live streaming. It is intended for broadcasters, streaming engineers, and operations teams working with Cires21 live video workflows.
Issue description
Audio-video synchronization issues occur when the audio and video streams are not aligned during playback or distribution. This can appear as delayed audio, early audio, lip sync mismatch, or inconsistent timing across the live stream.
Signs
- Audio is ahead of the video
- Audio is behind the video
- Lip movement does not match the spoken words
- The issue appears on one or more encoders or outputs
- Quality complaints are reported together with sync issues
Basic troubleshooting steps
- Restart the affected encoders.
- Check the network connectivity between the encoders and the origin servers.
- Verify that the encoders are configured correctly.
- Confirm that the encoders are not overloading the network.
- Review bitrate and resolution settings if quality issues are also reported.
Advanced troubleshooting steps
Step 1: Restart the affected encoders
Restart the encoder or encoders showing the synchronization problem. This can clear temporary processing issues and restore normal audio-video timing.
Step 2: Check connectivity to the origin servers
Verify that the encoders have stable network connectivity to the origin servers. Look for packet loss, latency, or intermittent interruptions that may affect stream timing.
Step 3: Review encoder configuration
Confirm that the encoder settings match the expected live workflow. Check input format, output profile, audio settings, and any timing-related parameters.
Step 4: Check network load
Make sure the encoders are not overloading the network. If necessary, reduce unnecessary traffic or move the stream to a less congested path.
Step 5: Verify bitrate and resolution settings
If users report quality issues together with sync problems, verify that the bitrate and resolution settings match the expected quality for the content being streamed.
Contact support
If the issue continues after completing these steps, contact Cires21 support and include the affected encoder name, stream ID, origin server details, observed symptoms, and any recent configuration changes.
Additional information
For related help, review your platform documentation for encoder configuration, network requirements, and live stream quality settings. If you use MediaCopilot or other Cires21 services in the same workflow, confirm that the issue is isolated to the live contribution path before escalating.
Conclusion
Most audio-video synchronization issues can be resolved by restarting the encoder, checking network stability, and validating configuration and quality settings. Use this guide as a quick reference when troubleshooting live stream sync problems.
Disclaimer
This article provides general troubleshooting guidance. If your deployment uses custom integrations, third-party infrastructure, or specialized broadcast workflows, additional investigation may be required.
Comments