openxc-trace-split - split merged OpenXC trace files into separate trips¶
openxc-trace-split is a command-line tool to re-split a collection of previously recorded OpenXC trace files by different units of time.
Often, trace files are recorded into arbitrarily sized chunks, e.g. a new trace file every hour. The trace files are often most useful if grouped into more logical chunks e.g. one “trip” in the vehicle.
This tool accepts a list of JSON trace files as arguments, reads them into memory and sorts by time, then re-splits the file into new output files based on the requested split unit. The unit is “trips” by default, which looks for gaps of 5 minutes or more in the trace files to demarcate the trips.
The output files are named based on the timestamp of the first record recorded in the segment.
Re-combine two trace files and re-split by trip (the default split unit) instead of the original day splits:
$ openxc-trace-split monday.json tuesday.json
Re-combine two trace files and re-split by hour instead of the original day splits:
$ openxc-trace-split --split hour monday.json tuesday.json
Re-split an entire directory of JSON files by trip
$ openxc-trace-split *.json
A quick overview of all possible command line options can be found via
Change the time unit used to split trace files - choices are
trip. The default unit is
trip, which looks for large gaps of time in the trace files where no data was recorded.