Raw stream viewer

jameswilson · Post by **jameswilson** » Wed Mar 08, 2006 11:35 am

maciekc, you know you mentioned i could use the code in my viewer, can i look at the code so as to see how you have achived shared mem access. I assume there is a jpeg in ram is there or does it work in a different way, ie this raw thing?

maciekc · Post by **maciekc** » Wed Mar 08, 2006 3:26 pm

jameswilson wrote:maciekc, you know you mentioned i could use the code in my viewer, can i look at the code so as to see how you have achived shared mem access. I assume there is a jpeg in ram is there or does it work in a different way, ie this raw thing?

Yes no problem - the source is in the package.

Shared mem access is functions shmget shmat.
The images in the memory are raw - not jpeg maybe there are also jpegs, but I didn't looked for them. The rgb images are simpler to use than jpegs and you don't have to decompress them.
If you have any questions please write to me.
GOOD LUCK with shm!

I have now some rescalling not yet included in the source, but I will try to use xvideo extension for this work - should be better because the rescallling, converting, and displaying will be done by graphics card not by main CPU.
I downloaded some testxv source that is example for xvideo I can mail it for you if you want.

jameswilson · Post by **jameswilson** » Wed Mar 08, 2006 5:05 pm

im not that far along with it yet, i was just wondering about changing the linux viewer i have to work with shared mem. It looks like a mine field lol. I was only curious so i caould mull it over in my head for a while, while i thought about the end game for the linux viewer. Am i right in thinking this raw viewer opens indivual windows per monitor
?

maciekc · Post by **maciekc** » Wed Mar 08, 2006 8:10 pm

jameswilson wrote:It looks like a mine field lol. I was only curious so i caould mull it over in my head for a while, while i thought about the end game for the linux viewer.

Could you explain what you mean? I'm not an englishmen...

jameswilson wrote:Am i right in thinking this raw viewer opens indivual windows per monitor
?

The version 0.3 - xlib_shm opens one window and up to 32(this could be simply changed by editing src). The monitors are positioned automatically(not resized - only scale=100%). My next goal is to use xvideo to display the pictures that would eat less CPU time, and probably will do also all the rescalling stuff.

xlib_raw is the other game:) - I probably won't make any updates of it - maybe only if someone wants.

jameswilson · Post by **jameswilson** » Wed Mar 08, 2006 8:37 pm

jameswilson wrote:
It looks like a mine field lol. I was only curious so i caould mull it over in my head for a while, while i thought about the end game for the linux viewer.

Could you explain what you mean? I'm not an englishmen...

I like to think about the problem for a while before starting to write code

semotta · Post by **semotta** » Wed Mar 08, 2006 9:14 pm

maciekc wrote:
semotta wrote: # ./xlib_shm -m 1
xlib_shm viewer for zm 1.22.0 version 0.3
imgx=0 imgy=0
delay=10000
shmkey=7a6d2000

monitors:1
ERROR: Failed to shmget

Any other hint?

Sergio
Probably not running zm. Start it with zmpkg.pl start

ZM is running. I can access through http.

Or you are trying to run xlib_shm on other user than zm(you should run it from the same user as www and zm - in debian www-data in other distros nobody, wwwuser and so on), you can also run it as root - for cheching if that was the fault.

I was already trying to run xlib_shm as root.

What else could I try?

EDIT: After posting I tried again and it worked! Sorry for I was doing something wrong. Thanks for your patience.
Sergio

maciekc · Post by **maciekc** » Wed Mar 08, 2006 9:25 pm

semotta wrote:
maciekc wrote:
semotta wrote: EDIT: After posting I tried again and it worked! Sorry for I was doing something wrong. Thanks for your patience.
Sergio
No problem...
Did you test it with diffrent monitor sizes? Does it work? I'm really curious and couldn't check it by myself.

jameswilson wrote: I like to think about the problem for a while before starting to write code

So you are opposite of me. I'm first trying to write. Of course it doesn't work, or work badly, next I'm googling and thinking...

jameswilson · Post by **jameswilson** » Wed Mar 08, 2006 10:38 pm

Code: Select all

So you are opposite of me. I'm first trying to write. Of course it doesn't work, or work badly, next I'm googling and thinking...

lol no i do that too, but i need to have a clue where to start and at the moment i have none.

PS of course i dont plan my code that would be just plain organised, professional and daft...lol

JAmes

victor_diago · Post by **victor_diago** » Tue Mar 28, 2006 1:26 am

Hi macieck

Ive run your software until now. it works VERY WELL. dont stops and maintain all sync.

but as we know zm 1.22.0 is a bit buggy. can you make a port to 1.21.4 ?

ive tried to change shm structure but no success.

Please, could you help us ?

Victor Diago

maciekc · Post by **maciekc** » Tue Mar 28, 2006 2:57 pm

victor_diago wrote:Hi macieck
Ive run your software until now. it works VERY WELL. dont stops and maintain all sync.
but as we know zm 1.22.0 is a bit buggy. can you make a port to 1.21.4 ?
ive tried to change shm structure but no success.
Please, could you help us ?
Victor Diago

I will take a look at this.
Which version of xlib_shm do you want to have ported?
I will then try to explain you how to do this - what you have to change.

ps. The version using xvideo is almost done - now you will be able to rescale image with beautiful antialiasing and without any cpu usage - everything is done inside graphics card.

---ADDED:
I have looked at this.
You have to change struct shareddata. That should be all. Simply find it in zm_monitor.h - lines 126-142 and copy to the source of xlib_shm. I don't want to install zm-1.21.4 because I have already installed 1.22.0 on my machine.

maciekc · Post by **maciekc** » Wed Mar 29, 2006 7:18 pm

new version - 0.4
Now I'm using xvideo extension to display images - it should be compatible with every new graphics card - I have RIVA TNT, and it works without any problems.
Now you are able to display up to 32 monitors they are automatically adjusted, positioned, and resized to perfectly fit the screen or window size.
Usage is the same as in 0.3 except options -w -h - they specify window width and height. If they are not specified - window size is your resolution(fullscreen). When you change window size monitors are also resized.

Please test it, and tell if there are any bugs.
My next goal is to make simple GUI with buttons.
http://dig.hopto.org/xlib_shm/

If you want a screenshot please write. I will make one for you.

ps. maybe I should change the name and start new topic zm_gui? What do you think?

victor_diago · Post by **victor_diago** » Wed Mar 29, 2006 8:28 pm

Hi.

Thanks, Congratulations for the perfect work.

We all in the zoneminder community has to thanks you.

Is this able to run in 1.21.4 ?

Thanks for now

Victor Diago

maciekc · Post by **maciekc** » Wed Mar 29, 2006 10:08 pm

victor_diago wrote: Is this able to run in 1.21.4 ?

After a little modification it should work.
Maybe I'will check this out this weekend.
Did you tried to change shm structure what I wrote few days ago?

victor_diago · Post by **victor_diago** » Tue Apr 11, 2006 11:36 am

Hi maciekc

Man all works like a charm.

Im wondering if there is a way to, view remotelly with your viewer. i mean, is there a way to write your system output to a file with ffmpeg´s help, encode it with divx and view remotely with ffplay or something like ?

Your software sure is a important step for zoneminder.

Thanks you and much congratulations.

Victor Diago

krattai · Post by **krattai** » Thu Apr 13, 2006 4:06 pm

I'm trying to get a copy of this to try, but looks like you've run into a problem on your server, maciekc.

Any idea when it'll be available again?

Cheers...