Difference between revisions of "Using camogm with Elphel393 camera"

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  /dev/mmcblk0p1 on /mnt/mmc type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
 
  /dev/mmcblk0p1 on /mnt/mmc type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
 
  /dev/sda1 on /mnt/sda1 type ext2 (rw,relatime,errors=continue)
 
  /dev/sda1 on /mnt/sda1 type ext2 (rw,relatime,errors=continue)
−
 
−
'''Note:''' subsequent description of ''camogm'' is no longer valid. Refer to [[Camogm]] wiki page for updated description.
 
  
 
The program for video/images recording is called ''camogm''. Its full description for previous series of Elphel cameras is available on [[Camogm]] wiki page. Current version of the program supports four sensor channels and has the same command set as the previous version, but commands can be sent to each channel separately. The program can be started the same way as described in [[Camogm#Starting_camogm|Starting camogm]] section, but now it will create four command pipes instead of one and each pipe will have channel number appended to the name provided on command line:
 
The program for video/images recording is called ''camogm''. Its full description for previous series of Elphel cameras is available on [[Camogm]] wiki page. Current version of the program supports four sensor channels and has the same command set as the previous version, but commands can be sent to each channel separately. The program can be started the same way as described in [[Camogm#Starting_camogm|Starting camogm]] section, but now it will create four command pipes instead of one and each pipe will have channel number appended to the name provided on command line:
  
−
  ~# ls -l /var/volatile/
+
  root@elphel393:~# ls -l /var/volatile/state/
−
  prwxr-xr-x    1 root    root            0 May 31 16:55 camogm_cmd0
+
  -rw-r--r-- 1 root root 176 Dec 21 18:56 camera
−
prwxr-xr-x    1 root     root             0 May 31 16:55 camogm_cmd1
+
  prwxrwxrwx 1 root root   0 Dec 21 19:28 camogm.state
−
  prwxr-xr-x    1 root     root             0 May 31 16:55 camogm_cmd2
+
  prwxr-xr-x 1 root root   0 Dec 21 19:28 camogm_cmd
−
  prwxr-xr-x   1 root     root             0 May 31 16:55 camogm_cmd3
 
−
drwxr-xr-x    2 root    root          180 May 31 16:54 log
 
−
drwxrwxrwt    2 root    root          160 May 31 16:54 tmp
 
−
 
 
−
''camogm'' is started from ''init_elphel393.sh'' script by default and its output is may not be visible on your console. You can stop current instances of the program and restart it from you terminal if the output should be visible:
 
−
 
 
−
~# for i in `seq 0 3`; do echo "exit" > /var/volatile/camogm_cmd$i; done
 
−
~# camogm /var/volatile/camogm_cmd
 
  
−
Alternatively, the status information output can be redirected to a file as described in [[Camogm#Sending_Commands_to_camogm|Sending commands to camogm]].
+
The status information output can be redirected to a file as described in [[Camogm#Sending_Commands_to_camogm|Sending commands to camogm]].
  
 
Note, that ''camogm'' is under development and not all features of the previous version have been ported to new camera. As for now, geo tagging and exif specific commands are not implemented. Watch for updates on our [https://github.com/Elphel github page].
 
Note, that ''camogm'' is under development and not all features of the previous version have been ported to new camera. As for now, geo tagging and exif specific commands are not implemented. Watch for updates on our [https://github.com/Elphel github page].
Line 54: Line 44:
 
===Example===
 
===Example===
 
====1.====
 
====1.====
−
* channel '''2''' (0-3)
+
* channel: all active ports will be recorded
 
* mount point '''/mnt/sda1''' (also works for a micro SD card partition, rootfs partition, USB or mounted NFS partition but the recording speed is slower than for an SSD)
 
* mount point '''/mnt/sda1''' (also works for a micro SD card partition, rootfs partition, USB or mounted NFS partition but the recording speed is slower than for an SSD)
 
* max duration = '''10 min''' (new file every 10 mins or other limit)
 
* max duration = '''10 min''' (new file every 10 mins or other limit)
 
* max size = '''1GB''' (new file every 1GB or other limit)
 
* max size = '''1GB''' (new file every 1GB or other limit)
 
* format = '''mov'''
 
* format = '''mov'''
−
* status updates: '''/var/tmp/camogm2.status'''
+
* status updates: '''/var/tmp/camogm.status'''
 
start recording:
 
start recording:
 
<font size='2'>
 
<font size='2'>
−
  echo "format=mov;status=/var/tmp/camogm2.status;prefix=/mnt/sda1/;duration=600;length=1073741824;start" > /var/volatile/camogm_cmd2
+
  echo "format=mov;status=/var/tmp/camogm.status;prefix=/mnt/sda1/;duration=600;length=1073741824;start" > /var/volatile/camogm_cmd
  
 
stop recording:
 
stop recording:
−
  echo "stop" > /var/volatile/camogm_cmd2
+
  echo "stop" > /var/volatile/camogm_cmd
 
  sync
 
  sync
−
'''NOTE:''' ''sync'' is important if you power off the camera w/o proper unmounting of the media  
+
'''NOTE:''' ''sync'' is important if you power off the camera w/o proper unmounting of the media.
 
</font>
 
</font>

Revision as of 11:41, 21 December 2016

Elphel 393 series cameras can be equipped with m.2 SSD drive used for images and video recording. The camera equipped with a drive should be configured in a way that the drive can be accessible from Linux operating system. This is normally done with a configuration script which is executed during system boot. The script is usually located in the root directory on microSD card or in the /etc directory and called init_elphel393.sh. These is a set of parameters in the beginning of the script and one of them is responsible for SATA controller configuration and driver loading: 

SATA_EN=1

Make sure this parameter is set to 1 if your camera is equipped with SSD drive. You should see the following messages in system log after successful initialization and auto-mounting: 

[   30.587212] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[   30.594510] ata1.00: ATA-9: SanDisk SD8SMAT128G1122, Z2320000, max UDMA/133
[   30.601426] ata1.00: 250069680 sectors, multi 1: LBA48 NCQ (depth 0/32)
[   30.616091] ata1.00: configured for UDMA/133
[   30.620669] scsi 0:0:0:0: Direct-Access     ATA      SanDisk SD8SMAT1 0000 PQ: 0 ANSI: 5
[   30.629879] sd 0:0:0:0: Attached scsi generic sg0 type 0
[   30.630011] sd 0:0:0:0: [sda] 250069680 512-byte logical blocks: (128 GB/119 GiB)
[   30.630987] sd 0:0:0:0: [sda] Write Protect is off
[   30.631106] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[   30.637003]  sda: sda1 sda2
[   30.646115] sd 0:0:0:0: [sda] Attached SCSI disk

The disk model and the number of partitions(sda1 and sda2) in the example above correspond to a test platform and they may not be the same in your camera. /dev/sda2 in this example is not partitioned and not mounted: 

~# mount
/dev/root on / type ext4 (rw,relatime,data=ordered)
devtmpfs on /dev type devtmpfs (rw,relatime,size=449540k,nr_inodes=112385,mode=755)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755)
tmpfs on /var/volatile type tmpfs (rw,relatime)
devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620)
/dev/mmcblk0p1 on /mnt/mmc type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
/dev/sda1 on /mnt/sda1 type ext2 (rw,relatime,errors=continue)

The program for video/images recording is called camogm. Its full description for previous series of Elphel cameras is available on Camogm wiki page. Current version of the program supports four sensor channels and has the same command set as the previous version, but commands can be sent to each channel separately. The program can be started the same way as described in Starting camogm section, but now it will create four command pipes instead of one and each pipe will have channel number appended to the name provided on command line: 

root@elphel393:~# ls -l /var/volatile/state/
-rw-r--r-- 1 root root 176 Dec 21 18:56 camera
prwxrwxrwx 1 root root   0 Dec 21 19:28 camogm.state
prwxr-xr-x 1 root root   0 Dec 21 19:28 camogm_cmd

The status information output can be redirected to a file as described in Sending commands to camogm.

Note, that camogm is under development and not all features of the previous version have been ported to new camera. As for now, geo tagging and exif specific commands are not implemented. Watch for updates on our github page.

Example

1.

  • channel: all active ports will be recorded
  • mount point /mnt/sda1 (also works for a micro SD card partition, rootfs partition, USB or mounted NFS partition but the recording speed is slower than for an SSD)
  • max duration = 10 min (new file every 10 mins or other limit)
  • max size = 1GB (new file every 1GB or other limit)
  • format = mov
  • status updates: /var/tmp/camogm.status

start recording: 

echo "format=mov;status=/var/tmp/camogm.status;prefix=/mnt/sda1/;duration=600;length=1073741824;start" > /var/volatile/camogm_cmd

stop recording: 

echo "stop" > /var/volatile/camogm_cmd
sync

NOTE: sync is important if you power off the camera w/o proper unmounting of the media.

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