Difference between revisions of "Multi camera system operation"
From ElphelWiki
(→scripts for downloading from internal SSD (via eSATA)) |
(→scripts for downloading from internal SSD (via eSATA)) |
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==Recording== | ==Recording== | ||
| − | Example for 2 cameras (2 X-Cams) - list comma-separated addresses in the GET line: | + | # Example for 2 cameras (2 X-Cams) - list comma-separated addresses in the GET line: |
http://192.168.0.39/multicam/?ip=192.168.0.39,192.168.0.38 | http://192.168.0.39/multicam/?ip=192.168.0.39,192.168.0.38 | ||
| + | # LWIR + XCAM | ||
| + | http://192.168.0.36/multicam/?ip=192.168.0.36,192.168.0.38 | ||
| + | |||
* tests button to get some diagnostics | * tests button to get some diagnostics | ||
* record button - starts recording on raw paritions (camera internal) | * record button - starts recording on raw paritions (camera internal) | ||
| Line 36: | Line 39: | ||
~$ ssh-copy-id root@192.168.0.39 | ~$ ssh-copy-id root@192.168.0.39 | ||
~$ ssh-copy-id root@192.168.0.38 | ~$ ssh-copy-id root@192.168.0.38 | ||
| − | ~$ | + | ~$ python2 int_ssd_download.py -h |
# Download 100GB from each | # Download 100GB from each | ||
| − | ~$ | + | ~$ python2 int_ssd_download.py -c root@192.168.0.39 -n 10 /path |
| − | ~$ | + | ~$ python2 int_ssd_download.py -c root@192.168.0.38 -n 10 /path |
This script: | This script: | ||
* creates a UID (/path/UID) directory, where UID - ID of the SSD | * creates a UID (/path/UID) directory, where UID - ID of the SSD | ||
Revision as of 16:08, 3 August 2020
Contents
Recording
# Example for 2 cameras (2 X-Cams) - list comma-separated addresses in the GET line: http://192.168.0.39/multicam/?ip=192.168.0.39,192.168.0.38 # LWIR + XCAM http://192.168.0.36/multicam/?ip=192.168.0.36,192.168.0.38
- tests button to get some diagnostics
- record button - starts recording on raw paritions (camera internal)
- snapshot button - saves a zip archive to host pc
Howto
Basic
- Power on
- Refresh multicam gui to get camogm started
- Record-button the recording will be started from the Current LBA (in /mnt/sda1/camogm.disk)
Start from the beginning of raw partition
- Power on
- Remove /mnt/sda1/camogm.disk on each camera (a new one is created by camogm on recording start)
- Refresh multicam gui to get camogm started
- Record-button
Note: Steps 2 and 3 can be swapped. Camogms will recreate camogm.disks on recording start. The free space in the multicam gui will also update to correct value on recording start.
Download footage
- /dev/sda1 - ext4
- /dev/sda2 - raw
raw partition write pointer position
root@elphel393:~# cat /mnt/sda1/camogm.disk Device Start LBA Current LBA End LBA /dev/sda2 12500992 38196200 250068992
How much is written:
(Current - Start)*512/2^30 GB
scripts for downloading from internal SSD (via eSATA)
- Get int_ssd_download.py:
~$ ssh-copy-id root@192.168.0.39 ~$ ssh-copy-id root@192.168.0.38 ~$ python2 int_ssd_download.py -h # Download 100GB from each ~$ python2 int_ssd_download.py -c root@192.168.0.39 -n 10 /path ~$ python2 int_ssd_download.py -c root@192.168.0.38 -n 10 /path
This script:
- creates a UID (/path/UID) directory, where UID - ID of the SSD
- switched the SSD to eSATA port
Note: Essentially the script does dd. If there is no eSATA cable it's possible to run dd over network. Something like:
ssh root@192.168.0.39 "dd if=/dev/sda2 bs=20M count=10 | gzip -1 -" | dd of=image.bin.gz
scripts for extraction
- Get split_mov_jp4.php. It takes channel shift as argv[1] when splitting. Example:
~$ cd /path/UID-of-192.168.0.39 ~$ /path-to-script/split_mov_jp4.php 0 ~$ cd /path/UID-of-192.168.0.38 ~$ /path-to-script/split_mov_jp4.php 4
