# Ego camera pose mismatch with number of frames

**URL:** <https://discuss.ego4d-data.org/t/ego-camera-pose-mismatch-with-number-of-frames/981>\
**Category:** Q&A\
**Created:** [July 17, 2025, 10:32pm UTC](https://discuss.ego4d-data.org/t/ego-camera-pose-mismatch-with-number-of-frames/981 "2025-07-17T22:32:43Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![cdhere](https://avatars.discourse-cdn.com/v4/letter/c/b38774/32.png) [@cdhere](https://discuss.ego4d-data.org/u/cdhere)\
**Post date:** [July 17, 2025, 10:32pm UTC](https://discuss.ego4d-data.org/t/ego-camera-pose-mismatch-with-number-of-frames/981/1 "2025-07-17T22:32:43Z")

</div>

Hi team, I’m trying to get the ego (aria) camera poses for each frame extracted from the take-level trimmed videos. However, the number of extracted frames from the videos is always 2 more than the number of provided poses in `/<data_root>/annotations/ego_pose/train/camera_pose<take-uid>.json`. For example, there are 3328 frames extracted from each camera of take `cmu_bike01_2`, but in `ed3ec638-8363-4e1d-9851-c7936cbfad8c.json` there are only 3326 poses under `camera_extrinsics`.  
What’s the right alignment between the provided poses and frames?