Open TAOKA-Daiki opened 1 month ago
You might need to change the maximum allowed packet setting. The docs for MySQL say that the default is 64mb.
https://dev.mysql.com/doc/refman/8.4/en/server-system-variables.html#sysvar_max_allowed_packet
Thank you for quick reply, @jodeleeuw.
I have checked MySQL server settings and the maximum allowed packet setting is being set to about 32MB. Unfortunately, I am using rental server and I cannot get permission to change that setting...
Okay, I found that this problem is not caused by jsPsych. I will try to find another way.
Thank you.
If you need an alternative data storage solution check out pipe.jspsych.org
Thank you for your suggestion. That sounds good.
I'll try it.
I am currently attempting to use a webcam to record the facial videos of the participants during an experimental task.
The following parameters are set when initializing the camera. {include_audio: false, width: 1280, height: 720, mime_type: 'video/mp4; codecs="avc1.424028, mp4a.40.2"'} The size of the experimental data is approximately 130 MB in csv format (2-5s video x 210 trials).
The jsPsych v7 initialize-camera, mirror-camera plugin, and record-video extensions work fine.
However, when sending the experimental data to the MySQL server at the end of the experiment, I get a "500 internal server status error". If I do not record video, the data is sent without problems. When sending data to the MySQL server, I am using the method documented in the official jsPsych Wiki, with almost no changes. I have also confirmed that there is no problem with the server capacity.
The column names "device_id" and "record_video_data" are added to the MySQL table. The columns' data types are specified as TEXT and LONGTEXT (up to 2^32 - 1 bytes) respectively. Using the localSave() method, the csv data is downloaded and indeed a very long base64 string is recorded.
Is there any solution or advice to this problem?
Thank you in advance.