Loading timestamp for electrode in open e-phys

[cellywiththesticks]

Hi all,

I am trying to see what my timestamps looks like in open e-phys for electrode 10. My timestamp files is currently saved as an .npy . Any help will be greatly appreciated!

[jsiegle]

I'd recommend either using open-ephys-python-tools or open-ephys-matlab-tools to load the entire recording. That will automatically load the timestamps for each data stream.

You can also replay the recording in the GUI by dragging the structure.oebin file into the File Reader.

[cellywiththesticks]

Okay, I want to synchronize the timestamps too because they aren’t starting ending at 25 minutes but seem to start at 25 minutes. My experiment runs for 25min but there is a 10 min waiting period where I just press play. However I am not sure what to input in this code that I found on the website. I do not know what TTL line number means, processor ID, or stream name. recording = session.recordnodes[0].recordings[0] recording.add_sync_line(8, # TTL line number 102, # processor ID 'Probe-A-AP', # stream name main=True) # use as the main stream recording.add_sync_line(1, # TTL line number 100, # processor ID 'Probe-A-LFP',# stream name main=False) # align to the main stream recording.add_sync_line(1, # TTL line number 100, # processor ID 'PXI-6133', # stream name main=False) # align to the main stream Best, Celine From: Josh Siegle ***@***.***> Date: Monday, September 16, 2024 at 1:24 PM To: open-ephys/plugin-GUI ***@***.***> Cc: Persad, Celine E. ***@***.***>, Author ***@***.***> Subject: [EXTERNAL] Re: [open-ephys/plugin-GUI] Loading timestamp for electrode in open e-phys (Issue #627) You don't often get email from ***@***.*** Learn why this is important<https://aka.ms/LearnAboutSenderIdentification> I'd recommend either using open-ephys-python-tools<https://github.com/open-ephys/open-ephys-python-tools> or open-ephys-matlab-tools<https://github.com/open-ephys/open-ephys-matlab-tools> to load the entire recording. That will automatically load the timestamps for each data stream. You can also replay the recording in the GUI by dragging the structure.oebin file into the File Reader<https://open-ephys.github.io/gui-docs/User-Manual/Plugins/File-Reader.html>. — Reply to this email directly, view it on GitHub<#627 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BLIZNKJZSLVNRHS7TNQYG2LZW4H2VAVCNFSM6AAAAABOFX6676VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDGNJTGQ4TMMRQHE>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[jsiegle]

What type of device did you use to record your data (e.g. Open Ephys Acquisition Board)? Depending on what you used, you may not need to do any additional synchronization.

[cellywiththesticks]

Yes I used the acquisition board but my timestamps start at around 2000 seconds which makes no sense since my recording ends at 25 min Get Outlook for iOS<https://aka.ms/o0ukef>

…

________________________________ From: Josh Siegle ***@***.***> Sent: Tuesday, September 17, 2024 3:02:10 PM To: open-ephys/plugin-GUI ***@***.***> Cc: Persad, Celine E. ***@***.***>; Author ***@***.***> Subject: [EXTERNAL] Re: [open-ephys/plugin-GUI] Loading timestamp for electrode in open e-phys (Issue #627) You don't often get email from ***@***.*** Learn why this is important<https://aka.ms/LearnAboutSenderIdentification> What type of device did you use to record your data (e.g. Open Ephys Acquisition Board)? Depending on what you used, you may not need to do any additional synchronization. — Reply to this email directly, view it on GitHub<#627 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BLIZNKMZCR5UXY2XZLKETKTZXB4DFAVCNFSM6AAAAABOFX6676VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDGNJWGY4DAOJQHE>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[jsiegle]

The timestamps are always relative to the time you started streaming data, not the time when you started recording. This is so if you start and stop recording multiple times while data continues to stream, all of the timestamps will be aligned to the same start time (i.e., you will know exactly how much time has elapsed between recordings). If you stop data streaming by pressing the "play" button, then the timestamps will reset to 0.

If the recording ends at 25 minutes, the last timestamp should be around 25 * 60 + 2000 = 3500 seconds. Is that what you see?

[cellywiththesticks]

Yes the biggest timestamp does end around there. Thank you! Best, Celine From: Josh Siegle ***@***.***> Date: Tuesday, September 17, 2024 at 3:47 PM To: open-ephys/plugin-GUI ***@***.***> Cc: Persad, Celine E. ***@***.***>, Author ***@***.***> Subject: [EXTERNAL] Re: [open-ephys/plugin-GUI] Loading timestamp for electrode in open e-phys (Issue #627) You don't often get email from ***@***.*** Learn why this is important<https://aka.ms/LearnAboutSenderIdentification> The timestamps are always relative to the time you started streaming data, not the time when you started recording. This is so if you start and stop recording multiple times while data continues to stream, all of the timestamps will be aligned to the same start time (i.e., you will know exactly how much time has elapsed between recordings). If you stop data streaming by pressing the "play" button, then the timestamps will reset to 0. If the recording ends at 25 minutes, the last timestamp should be around 25 * 60 + 2000 = 3500 seconds. Is that what you see? — Reply to this email directly, view it on GitHub<#627 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BLIZNKLYESH4PFBUJACX3ALZXCBMPAVCNFSM6AAAAABOFX6676VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDGNJWG43DANRSGY>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[chiyu1203]

Hi @jsiegle @cellywiththesticks,
I would like to quickly follow up this discussion since I bumped into the same issue last week. The recording was 37 mins long but perhaps I started to stream the data much earlier (20 mins earlier), the timestamp was count around 20 mins earlier. Is there any post-hoc way to precisely adjust the timestamp so that it is align to the start of the recording not the start of the streaming? I use Open Ephys Acquisition Board, I/O board and GUI v0.6.7

[jsiegle]

Hi @chiyu1203 – can you just subtract the first recorded timestamp from all of the others? That should re-align the subsequent timestamps with the start of the recording, rather than the start of acquisition.

[chiyu1203]

Hi @chiyu1203 – can you just subtract the first recorded timestamp from all of the others? That should re-align the subsequent timestamps with the start of the recording, rather than the start of acquisition.

Thanks! That's a good point. I will do that!