💻 Environment/Context
- Live
- Livestream Setup
- Livestream Troubleshooting
- Recorded live feeds
- SRT
❓ Issue/Question
- Hi Team for the stream Day 1 - Opening, the stream has many pixelations, artifacts
- For Qualifying 1 we have faced a lot of glitches
👌 Resolution/Answer
-
Check your encoder and the network path to ScorePlay
- Confirm the SRT return path back to your encoder is open, so lost packets can be re-sent
- Confirm your SRT latency setting is high enough for a re-sent packet to arrive in time
- Restart your encoder before the next session
- The affected recording can't be repaired — the artefacts arrive with the feed and are saved into the recording as it's created
- If a local recording was kept at your encoder, it can be uploaded to replace the damaged one
🥚 Cause
Visual artefacts and pixelation occur when video data is lost or already degraded somewhere along the ingest path. There are three possible sources:
- The feed already contains the artefacts when it reaches us — the video was degraded at source or by the encoder before being sent
- SRT packets are lost between the encoder and our SRT server and are not recovered — a network or encoder configuration issue on the path between the customer and us
- A capacity issue between the SRT server and our transcoding service
Artefacts from the first two causes are written into the recording as it's created, so seeing them in the recording rules out playback but does not on its own tell those two apart.
🔖 Notes
- The recording and the live stream come from the same feed, so artefacts in the recording were visible to live viewers at the time too
- Live stream is not working