[Elphel-support] Camogm triggered mode

[Alexandre Poltorak]

Dimitrios,

To solve the problem with tons of files in one directory you can create a directory tree to reduce the number of files per folder.

Let's say you keep videos for 4 weeks in your app on the camera's internal flash. You can create a directory per week, sub-directory for each day of week, and a sub-directory for each hour for example. You use simple shell or PHP script to set camogm to record to those directories.

Adding the ability to camogm to append some video to a file may be a nice option for some configurations. I do not know if MOV of OGG support that. We also have an experimental and unsupported MKV support on a fork of camogm. The downside is if a file-corruption occurs, you loose much more.

This wiki page describe how to setup your SDK on Ubuntu/Kubuntu:
http://wiki.elphel.com/index.php?title=Elphel_Software_Kit_for_Ubuntu

Or you can download the Kubuntu ISO here: 
http://community.elphel.com/files/live-dvd/

Regards,
Polto

----- Mail original -----
| De: "Dimitrios" <dz at telemetry.gr>
| À: support-list at support.elphel.com
| Envoyé: Vendredi 6 Janvier 2012 15:19:39
| Objet: Re: [Elphel-support] Camogm triggered mode
| 
| Polto
| 
| Thank you for bringing this up. I've tried this solution because it
| can
| satisfy all of the requirements of my proposed camogm 'trigger'
| command,
| with some attention to proper timing:
| 
| 1. Single image: take a snapshot with wget.
| 2. Burst recording: use camogm's 'max_frames' command to limit frames
| in
| a burst.
| 2. Record for duration: issue a 'start' camogm command, wait for
| 'duration', issue a 'stop' command.
| 
| The problem that remains is that the CF gets filled with thousands of
| small files, which, as Andrey says, will deteriorate efficiency as
| their
| number grows. On the other hand, I can already do that by using
| 'imgsrv'
| and a separate mobile PC, although the images saved on that PC's disk
| will also be separate files.
| 
| I don't know if there is a way to prevent camogm from starting a new
| file when a new 'start' command is given and append new frames to the
| same file, other than changing the source code.I believe it may not
| be
| so hard to implement a trigger command in camogm, provided I'll be a
| little more confident with compiling and fiddling with the camera.
| 
| Regards
| Dimitrios
| 
| 
| On 01/06/2012 02:52 AM, Alexandre Poltorak wrote:
| > Dimitrios,
| > 
| > try to experiment with camogm and external trigger as I did with
| > arduino on motion detection :
| > http://wiki.elphel.com/index.php?title=Arduino#Arduino_source_code
| > 
| > it should be much more faster than calling wget and any PHP
| > software.
| > 
| > regards,
| > Polto
| > 
| 
| _______________________________________________
| Support-list mailing list
| Support-list at support.elphel.com
| http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
|