Difference between revisions of "Multi camera system operation"

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(Created page with "==Recording== Example for 2 cameras - list comma-separated addresses in the GET line: http://192.168.0.39/multicam/?ip=192.168.0.39,192.168.0.38 ==Download footage== ... ...")
 
 
(9 intermediate revisions by the same user not shown)
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==Recording==
 
==Recording==
−
Example for 2 cameras - 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
 +
* record button - starts recording on raw paritions (camera internal)
 +
* snapshot button - saves a zip archive to host pc
 +
 +
==Recording manual LWIR+XCAM==
 +
LWIR camera:
 +
  1. http://192.168.0.36/camogmgui.php
 +
  2. Format-tab, select mov, enter /mnt/sda1/, click OK
 +
  3. click recording
 +
XCam
 +
  1. http://192.168.0.38/camogmgui.php
 +
  2. (optinal?) select fast recording, click OK
 +
  3. click recording
 +
 +
===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==
 
==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 [https://git.elphel.com/Elphel/elphel-tools-x393 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 [https://git.elphel.com/Elphel/eyesis4pi-393-gui/blob/master/footage_downloader/split_mov_jp4.php 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
  
 
[[Category:393]]
 
[[Category:393]]

Latest revision as of 16:23, 3 August 2020

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

Recording manual LWIR+XCAM

LWIR camera: 
  1. http://192.168.0.36/camogmgui.php
  2. Format-tab, select mov, enter /mnt/sda1/, click OK
  3. click recording
XCam
  1. http://192.168.0.38/camogmgui.php
  2. (optinal?) select fast recording, click OK
  3. click recording

Howto

Basic

  1. Power on
  2. Refresh multicam gui to get camogm started
  3. Record-button the recording will be started from the Current LBA (in /mnt/sda1/camogm.disk)

Start from the beginning of raw partition

  1. Power on
  2. Remove /mnt/sda1/camogm.disk on each camera (a new one is created by camogm on recording start)
  3. Refresh multicam gui to get camogm started
  4. 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)

~$ 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

~$ 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
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