How to use Audio and Video Event-Offset Measurer
- Choose a supported short video with one audio track.
- Inspect the visible event and audible event, then enter their marker times.
- Set the evidence window, run the comparison and review the waveform and nearby frames.
- Save the worksheet with the marker choices and their uncertainty.
Example: Audio and Video Event-Offset Measurer
Describe a beep occurring after a visible flash.
Options
- Video and audio markers
- Enter times measured from the same source start. Their difference is audio minus video; positive means the chosen audio event is later.
- Evidence window
- This chooses the nearby frame and waveform view. The window must intersect decoded audio; a larger view does not increase marker accuracy.
Supported inputs and limits
Where your input is processed
This tool processes your input in this browser. Your text and files are not uploaded to UseFreeTools. Check this tool's limits for anything it may save on your device.
The sign tells you which marker is later
The offset is audio time minus video time. A positive result means your audio marker is later; a negative result means it is earlier. It describes the entered event pair, rather than a universal correction for the whole file.
Marker uncertainty matters
A broad sound onset, motion blur or browser seek can make an event hard to place. Review the three nearby frames and waveform instead of treating a decimal input as equally precise evidence. Repeat with another identifiable event if you suspect timing drift.
Questions about Audio and Video Event-Offset Measurer
Does it find or fix synchronization automatically?
No. You choose the event times; the tool calculates and documents their difference.
What does a positive offset mean?
Your entered audio marker is later than your video marker. It is the difference for that chosen event pair.
Is my input uploaded?
Nothing is uploaded.