# Mismatch between video and online\_calibration.jsonl?

**URL:** <https://discuss.ego4d-data.org/t/mismatch-between-video-and-online-calibration-jsonl/493>\
**Category:** Q&A\
**Created:** [February 10, 2024, 9:35am UTC](https://discuss.ego4d-data.org/t/mismatch-between-video-and-online-calibration-jsonl/493 "2024-02-10T09:35:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![wlee](https://avatars.discourse-cdn.com/v4/letter/w/6bbea6/32.png) [@wlee](https://discuss.ego4d-data.org/u/wlee)\
**Post date:** [February 10, 2024, 9:35am UTC](https://discuss.ego4d-data.org/t/mismatch-between-video-and-online-calibration-jsonl/493/1 "2024-02-10T09:35:56Z")

</div>

I have a question about the online calibration data.

I downloaded the takes and take\_trajectory.

I checked them and found the discrepancy between the number of frames in the video and the number of rows in online\_calibration.jsonl.

For example,  
scene\_name = utokyo\_sushi\_12\_1008\_4  
frame\_alignment\_videos/aria1\_214-1.mp4: 4003 frames  
trajectory/online\_calibration.jsonl: 4004 rows.

scene\_name = utokyo\_soccer\_8000\_17\_2  
frame\_alignment\_videos/aria01\_214-1.mp4: 17478 frames  
trajectory/online\_calibration.jsonl: 17479 rows.

Could you check on your side if this is true? If so, could you check whether I should start from index 0? or index 1?

(+ Could you please make the filename the same in the later release? One has aria1\_214-1.mp4 and the other has aria01\_214-1.mp4.)