Openbci_gui: Playback from file in 4.0.2 error

[jps2000]

Problem

Version 4.0.2 write one column more in ganglion
Example:
previous version :
%OpenBCI Raw EEG Data
%
%Sample Rate = 200.0 Hz
%First Column = SampleIndex
%Last Column = Timestamp
%Other Columns = EEG data in microvolts followed by Accel Data (in G) interleaved with Aux Data
0, 153.43, 646.95, 437.44, -34.03, 0.000, 0.000, 0.000, 03:10:01.012
1, 138.93, 629.45, 457.75, -46.83, 0.000, 0.000, 0.000, 03:10:01.014
2, 134.32, 632.02, 440.07, -43.25, 0.000, 0.000, 0.000, 03:10:01.014

version 4.0.2
%OpenBCI Raw EEG Data
%Number of channels = 4
%Sample Rate = 200.0 Hz
%First Column = SampleIndex
%Last Column = Timestamp
%Other Columns = EEG data in microvolts followed by Accel Data (in G) interleaved with Aux Data
0, 14.27, 15.53, 10.35, 15.34, 0.000, 0.000, 0.000, 14:45:42.454, 1541598342454
1, 12.31, 12.26, 11.11, 16.43, 0.000, 0.000, 0.000, 14:45:42.469, 1541598342469
2, 11.52, 13.29, 8.38, 12.38, 0.000, 0.000, 0.000, 14:45:42.469, 1541598342469
3, 14.91, 16.07, 13.62, 13.64, 0.000, 0.000, 0.000, 14:45:42.484, 1541598342484
4, 13.79, 16.78, 17.93, 20.13, 0.000, 0.000, 0.000, 14:45:42.484, 1541598342484

so there is one column more. ( Aux data???)
Despite the correct number of channels reported in the header (4) OpenBCIGUI reports 8 channels with crap accelerometer reading (1541598342484 reported as x).
I edited the file and by removing last column it works as expected
Accelerometer data are ok then however not moving smoothly as time series does. ( rattling)

Expected

Playback should work with new recordings as well as with old recordings

Operating System and Version

W7 professional

GUI Version

4.0.2

Running standalone app

downloaded app

Type of OpenBCI Board

Ganglion

Are you using a WiFi Shield?

No

[andrewjaykeller]

Hi! We added the new column as a much more accurate time stamp in ms! Are you saying you can’t use a playback file recorded in 4.0.2 on ganglion?

[jps2000]

Unfortunately yes.
Files recorded with last release GUI works. Recordings with 4.0.2 don´t.
Deleting last column in those files let it work again.
%Number of channels line has no effect.
I just issued another problem in ganglion code ( see there)

[jps2000]

Silly Question:
Could have tested also pre - release versions but I do not know how to make application.windows64 files

[retiutut]

OpenBCIGUI reports 8 channels with crap accelerometer reading (1541598342484 reported as x).

Woah! That doesn't sound good.

Looking into this issue also...

[andrewjaykeller]

Hi @jps2000 this was just fixed for 4.0.3 on mac and windows! https://github.com/OpenBCI/OpenBCI_GUI/releases/tag/v4.0.3-beta.0

[jps2000]

great
Have checked it and it works now as expected
Thank you