iafilatov/hikstract

Extracts videos recorded by Hikvision IP camera

hikstract's Issues

Extraction fails with "struct.error: unpack requires a bytes object of length 80"

At first, thank you very much for the great script!

But some directories are failed to be processed.

Here is the debug output and the index file.

./hikstract
2018-07-19 11:58:42,743 [15476] DEBUG: Finished loading db: {'cur_datadir': 'datadir0',
 'datadirs': {'datadir0': {'cur_section': 1,
                           'last_vrec': 0,
                           'revision': 15787},
              'datadir1': {'cur_section': 131,
                           'last_vrec': 1,
                           'revision': 16269},
              'datadir2': {'cur_section': 0,
                           'last_vrec': -1,
                           'revision': 15683}}}
2018-07-19 11:58:42,743 [15476] INFO: Entering datadir0
2018-07-19 11:58:42,743 [15476] DEBUG: Making Header at /mnt/transport/vol03/datadir0/index00.bin:0
2018-07-19 11:58:42,744 [15476] DEBUG: cur_sec_idx: 2, rec_sec_num: 186, revision: 14228, total_sec: 2
2018-07-19 11:58:42,744 [15476] INFO: Index revision is 14228
2018-07-19 11:58:42,744 [15476] DEBUG: Making Section at /mnt/transport/vol03/datadir0/index00.bin:500
2018-07-19 11:58:42,744 [15476] DEBUG: end_dt: 2018-02-14 16:14:15, idx: 0, last_vrec_idx: 0, start_dt: 2018-02-14 15:52:02
2018-07-19 11:58:42,744 [15476] DEBUG: Making Section at /mnt/transport/vol03/datadir0/index00.bin:520
2018-07-19 11:58:42,745 [15476] DEBUG: end_dt: 2018-02-22 15:47:50, idx: 1, last_vrec_idx: 0, start_dt: 2018-02-22 15:39:22
2018-07-19 11:58:42,745 [15476] DEBUG: Making CurrentSection at /mnt/transport/vol03/datadir0/index00.bin:30
2018-07-19 11:58:42,745 [15476] DEBUG: end_dt: 1970-01-01 00:00:00, idx: 255, last_vrec_idx: 0, start_dt: 1970-01-01 00:00:00
2018-07-19 11:58:42,745 [15476] DEBUG: Entering section 1
2018-07-19 11:58:42,746 [15476] DEBUG: Making VideoRecord at /mnt/transport/vol03/datadir0/index00.bin:6c40
2018-07-19 11:58:42,746 [15476] DEBUG: duration: 508, end_dt: 2018-02-22 15:47:50, length: 260466216, start_dt: 2018-02-22 15:39:22, start_offset: 0
2018-07-19 11:58:42,746 [15476] DEBUG: Entering section 255
2018-07-19 11:58:42,746 [15476] DEBUG: Making VideoRecord at /mnt/transport/vol03/datadir0/index00.bin:4fcc40
Traceback (most recent call last):
  File "./hikstract", line 50, in <module>
    run()
  File "./hikstract", line 42, in run
    parser.update()
  File "/home/user/git/hikstract/parser.py", line 32, in update
    self.update_datadir(datadir)
  File "/home/user/git/hikstract/parser.py", line 61, in update_datadir
    next_vrecs = u.islice_from(sec.video_records, next_vrec_idx)
  File "/home/user/git/hikstract/items.py", line 104, in video_records
    vrec = VideoRecord.make(self._h_idx_file, idx, start)
  File "/home/user/git/hikstract/items.py", line 58, in make
    fields = struct.unpack(cls.fmt, buf)
struct.error: unpack requires a bytes object of length 80

-- in this case only one video file is created.
index00.bin.gz

Index.db file missing

What is the index.db file? Is it supposed to be autogenerated from the script? Or am I supposed to get it from the hikvision SD Card?