A Python library for parsing MISB/STANAG 4609 Key Length Value (KLV) metadata.
Project description
What?
Klvdata is a Python library for parsing and constructing Key Length Value (KLV) formatted binary streams. Common uses of the library would be parsing and displaying MISB ST 0601 Unmanned Air System (UAS) metadata from STANAG 4609 compliant MPEG-2 Transport Streams (TS) (MPEG-TS). Note that klvdata alone cannot de-mux KLV data from an MPEG-2 TS, but programs like FFmpeg and GStreamer can be used with klvdata in the workflow to perform the function.
Why?
Not many opensource options available.
Features
Quick Start
Try these commands in your GNU/Linux terminal.
First:
$ pip install klvdata
$ wget https://raw.githubusercontent.com/paretech/klvdata/master/data/DynamicConstantMISMMSPacketData.bin
$ cat << EOF > klvdata_test.py
#!/usr/bin/env python
import sys, klvdata;
for packet in klvdata.StreamParser(sys.stdin.buffer.read()): packet.structure()
EOF
And then:
$ python ./klvdata_test.py < DynamicConstantMISMMSPacketData.bin
<class 'klvdata.misb0601.UASLocalMetadataSet'>
<class 'klvdata.misb0601.PrecisionTimeStamp'>
<class 'klvdata.misb0601.MissionID'>
<class 'klvdata.misb0601.PlatformHeadingAngle'>
<class 'klvdata.misb0601.PlatformPitchAngle'>
<class 'klvdata.misb0601.PlatformRollAngle'>
<class 'klvdata.misb0601.PlatformDesignation'>
<class 'klvdata.misb0601.ImageSourceSensor'>
<class 'klvdata.misb0601.ImageCoordinateSystem'>
<class 'klvdata.misb0601.SensorLatitude'>
<class 'klvdata.misb0601.SensorLongitude'>
<class 'klvdata.misb0601.SensorTrueAltitude'>
<class 'klvdata.misb0601.SensorHorizontalFieldOfView'>
<class 'klvdata.misb0601.SensorVerticalFieldOfView'>
<class 'klvdata.misb0601.SensorRelativeAzimuthAngle'>
<class 'klvdata.misb0601.SensorRelativeElevationAngle'>
<class 'klvdata.misb0601.SensorRelativeRollAngle'>
<class 'klvdata.misb0601.SlantRange'>
<class 'klvdata.misb0601.TargetWidth'>
<class 'klvdata.misb0601.FrameCenterLatitude'>
<class 'klvdata.misb0601.FrameCenterLongitude'>
<class 'klvdata.misb0601.FrameCenterElevation'>
<class 'klvdata.misb0102.SecurityLocalMetadataSet'>
<class 'klvdata.misb0102.SecurityClassification'>
<class 'klvdata.misb0102.UnknownElement'>
<class 'klvdata.misb0102.UnknownElement'>
<class 'klvdata.misb0102.UnknownElement'>
<class 'klvdata.misb0102.UnknownElement'>
<class 'klvdata.misb0102.UnknownElement'>
<class 'klvdata.misb0601.UASLSVersionNumber'>
<class 'klvdata.misb0601.UnknownElement'>
<class 'klvdata.misb0601.Checksum'>
If you have FFmpeg installed and want to try it on real video from a drone with embedded KLV metadata (~97 MB Download):
$ wget http://samples.ffmpeg.org/MPEG2/mpegts-klv/Day%20Flight.mpg
$ ffmpeg -i Day\ Flight.mpg -map data-re -codec copy -f data - | python ./klvdata_test.py
<class 'klvdata.misb0601.UASLocalMetadataSet'>
<class 'klvdata.misb0601.PrecisionTimeStamp'>
<class 'klvdata.misb0601.UASLSVersionNumber'>
<class 'klvdata.misb0601.PlatformHeadingAngle'>
<class 'klvdata.misb0601.PlatformPitchAngle'>
<class 'klvdata.misb0601.PlatformRollAngle'>
<class 'klvdata.misb0601.ImageSourceSensor'>
<class 'klvdata.misb0601.ImageCoordinateSystem'>
<class 'klvdata.misb0601.SensorLatitude'>
<class 'klvdata.misb0601.SensorLongitude'>
<class 'klvdata.misb0601.SensorTrueAltitude'>
<class 'klvdata.misb0601.SensorHorizontalFieldOfView'>
<class 'klvdata.misb0601.SensorVerticalFieldOfView'>
<class 'klvdata.misb0601.SensorRelativeAzimuthAngle'>
<class 'klvdata.misb0601.SensorRelativeElevationAngle'>
<class 'klvdata.misb0601.SensorRelativeRollAngle'>
<class 'klvdata.misb0601.SlantRange'>
<class 'klvdata.misb0601.TargetWidth'>
<class 'klvdata.misb0601.FrameCenterLatitude'>
<class 'klvdata.misb0601.FrameCenterLongitude'>
<class 'klvdata.misb0601.FrameCenterElevation'>
<class 'klvdata.misb0601.TargetLocationLatitude'>
<class 'klvdata.misb0601.TargetLocationLongitude'>
<class 'klvdata.misb0601.TargetLocationElevation'>
<class 'klvdata.misb0601.PlatformGroundSpeed'>
<class 'klvdata.misb0601.GroundRange'>
<class 'klvdata.misb0601.Checksum'>
[...]
Documentation
Documentation is available at https://paretech.github.io/klvdata.
Contributing
Contributions are welcome!
Contributors List:
Project details
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.