| Global Sync Drift Early | |
| Display Text | Global Sync Drift Early |
| Description | “Global Sync Drift Early” refers to audio sync that drifts progressively earlier through a section or entire program (e.g. Audio starts in sync, is 2 seconds early towards the middle of program, and 5 seconds early by the end of program). |
Example of Global Sync Drift Early for Audio vs. Picture
Example of Global Sync Drift for Audio vs. timed Text
| Impact | Global audio sync drift will become progressively more noticeable and distracting to members, potentially making the content unwatchable, if it extends through the entire program runtime. |
| Severity Assessment Guidance | |
| FYI | N/A |
| Issue | Audio drifts early compared to on screen action through a scene or multiple scenes. |
| Blocker | Audio drifts early compared to on screen action through the majority of or the entirety of the program. |
| Solutions | |
| How to Prevent |
Review audio on timeline and ensure it is properly aligned with on-screen action, as sync can easily shift during an edit. Verify that audio and video have been recorded at the same frame rate. |
| How to Fix |
Adjust frame rate or fix sync on timeline and re-export audio as needed. For text files, convert the framerate of the file to match the video’s framerate. If both the text and video files are timed to 23.976fps, this may be attributed to confusion around SMPTE vs. MEDIA timebase. Please refer to Timed Text Sync - Global Drift Early (Text) for more in-depth troubleshooting techniques. |