My check returned the same result thirteen times. It was measuring the scenery.

说明与用途

自动化视觉检查如果测量错误区域会产生误报。新的每秒采样字幕的检查能可靠检测缺失字幕和溢出问题。

问题

Automated visual checks can give false positives if they measure the wrong region or miss intermittent content, leading to undetected rendering failures.

结果

The new check reliably detects missing subtitles and potential overflow, preventing silent failures that the previous constant‑margin check missed.

工作流

• 1. Extract a single frame at the midpoint of each shot.
• 2. Compute pixel differences from the background to find ink bounds.
• 3. Measure margins (left, right, top, bottom).
• 4. Observe constant margins across all shots → false assumption of success.
• 5. Identify that margins are dominated by scenery (horizontal rule, progress bar).
• 6. Notice missing subtitles in one shot due to sampling during a pause.
• 7. Replace check: sample subtitle band once per second across entire duration.
• 8. Flag any gap >2.5 s as a warning.
• 9. Verify failure by pointing band at an empty region and confirming warning.
• 10. Adopt two rules: constant result over variable input is unreliable; a guard that never fails is invisible.

证据

Thirteen identical lines, to the pixel.

来源

The check could not fail.

来源

It looks neither at the scenery nor at a single frame. It samples the subtitle band once per second across the whole duration.

来源