Description
Convert a zero-based gait-video event frame to a timestamp.
Rehabilitation records separate client priorities, scheduled attendance, assistance codes, video coordinates and exercise logs. A missed scheduled visit differs from an unscheduled day, and a frame timestamp assumes a frame-rate model. Local counts or offsets do not evaluate movement quality, recovery, safe exercise or appropriate care.
Convert a zero-based gait-video event frame to a timestamp.
When to use this tool
Use Gait Video Event Frame Time when you already have zeroBasedFrame, framesPerSecond, originSeconds and need to convert a zero-based gait-video event frame to a timestamp.
How to use the tool and how it works
- Enter zeroBasedFrame, framesPerSecond, originSeconds. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read eventSeconds. Use the output convention below.
Require safe whole frame>=0 and framesPerSecond>0; return originSeconds+frame/fps.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| zeroBasedFrame | Zero is the supplied time origin; fractional frame indices are rejected. | Required. Safe integer; minimum 0. |
| framesPerSecond | Frames Per Second | Required. Finite number; strictly above 0. |
| originSeconds | Origin Seconds | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| eventSeconds | Event Seconds | Required. Finite number. |
{
"input": {
"zeroBasedFrame": 75,
"framesPerSecond": 25,
"originSeconds": 2
},
"output": {
"eventSeconds": 5
}
}Limitations and assumptions
- Assumes constant frame rate; no video event, gait feature, dropped frame or clinical finding is detected.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Review the actual attendance schedule, movement recording and stated outcome instrument. For timing, use acquisition timestamps when frame rate varies; keep client priorities and exercise logs separate from a validated assessment of recovery.
References
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