Download videos only if they are with IMU signals

[arxrean]

Thank you for creating and sharing this large-scale and high-quality dataset.

Is it possible to only download the subset videos with IMU signals rather than downloading all videos? I'm still waiting for the approval so haven't started the downloading process. I think one way to do that is firstly downloading the IMU data, collect the sample ids and use the ids to filter the full video dataset. But I wonder if there is any easier way than that.

Also, any info about the size of the subset videos with IMU signals?

Thank you in advance.

[Peipi98]

Hi! I'm not an author, but from my experience:

Is it possible to only download the subset videos with IMU signals rather than downloading all videos? I'm still waiting for the approval so haven't started the downloading process. I think one way to do that is firstly downloading the IMU data, collect the sample ids and use the ids to filter the full video dataset. But I wonder if there is any easier way than that.

If you're looking for ego data, both RGB and IMU come together in a .vrs file (check here). There is a tutorial with projectariatools in this repository.

Also, any info about the size of the subset videos with IMU signals?

Yes, it's here, there are sizes for each part within the table.

I hope I've been helpful 😄

[miguelmartin75]

• For EgoExo4D: every video has IMU as @Peipi98 suggests.
• For Ego4D: you will have to read the ego4d.json metadata file and retrieve the set of video uids with IMU (use the field has_imu). With this you can use the flag: --video_uids <video_uid_list> or save the list to a text file (each line has the video uid) and use --video_uid_file <file>; see here: https://ego4d-data.org/docs/CLI/#detailed-flags

[arxrean]

Thank you! Yes, I downloaded the data by parsing ego4d.json.