Saving Video creation time to Metadata

[miahoffmannd]

I am using these videos to synchronize with other sensing systems. However, the saved metadata from the synchronized videos no longer contains the timestamp (UTC) for when the video was recorded. Is there a away to have this saved either in the metadata or in the debug folder? At the very least, is there a way for the "trimming point" (frame number) for each video to be saved to the debug file, so that this can then be calculated?

[philipqueen]

Hello, thanks for the issue!

It does seem like this is a desirable feature. I'll look into editing the output metadata to include a calculated timestamp.

[philipqueen]

@miahoffmannd I'm finally getting a chance to look into this. Would you mind sharing what metadata you're accessing that's storing the timestamp? The videos I'm testing with don't appear to have any metadata related to start time.

Also, in the meantime, it may help you to know there is a file synchronization_debug.toml in the synchronized video folder. It's not well documented, but the top field of this .toml file is [Lag_dictionary], which gives the amount trimmed off the front of each video in seconds. You should be able to use that to update whatever metadata.

For example, in this case:

[Lag_dictionary]
Cam_0 = "2.7099319727891156"
Cam_2 = "0.0"

2.7 seconds were trimmed off the front of Cam_0s video to get it to line up with Cam_2 - i.e. Cam_0 started 2.7 seconds before Cam_2