def parse_stream(inf):
""" Parse KLV metadata from drone mpeg footage, taken as packets from a
stream (ffmpeg) or a binary file containing the metadata.
Can be called from a Bash pipeline, or directly on file from Python.
----------
inf : {stream from stdin, binary metadata file} Takes a stream of metadata
from drone video mpeg file(s) or binary file(s) of drone metadata.
"""
metadata = collections.OrderedDict()
for packet in klvdata.StreamParser(inf):
metadata.update(packet.MetadataList())
#break #Capture only first packet
metadata = dict(metadata)
return metadata
def extract_mpegts(path):
with open(path, 'rb') as stream:
streams_packets = mpegtsdata.extract_streams(stream)
for key in streams_packets:
packets = streams_packets[key]
print(f'key=0x{key:X}, packets: {len(packets)}')
klv_data, pts_per_packet = reconstruct_klv_packets(packets)
total_klv_packets = len(pts_per_packet)
if total_klv_packets:
print(f'Reconstructed packets: {total_klv_packets}')
index = 0
for packet in klvdata.StreamParser(klv_data):
print(f'Packet pts: {pts_per_packet[index]}')
index += 1
packet.structure()
packet.validate()
#!/usr/bin/env python
import sys, klvdata
for packet in klvdata.StreamParser(sys.stdin.buffer.read()):
packet.structure()
# python -c "import sys; import klvdata; for packet in klvdata.StreamParser(sys.stdin.buffer.read()): packet.structure()"
#!/usr/bin/env python3
import klvdata
import sys
import pickle
'''
This script receives as command line parameter
the name of the klvdata binary file and
writes a Pickle file preserving the python object for reuse.
This script ignore Unknown Elements that prevent its functioning
'''
if __name__ == "__main__":
args = sys.argv
with open(args[1], 'rb') as f:
output = open(args[1] + ".pkl", "wb")
for packet in klvdata.StreamParser(f):
if type(packet) is not klvdata.element.UnknownElement:
metadata = packet.MetadataList()
pickle.dump(metadata, output)
output.close()
def extract_klv(path):
with open(path, 'rb') as stream:
for packet in klvdata.StreamParser(stream):
packet.structure()
packet.validate()