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Posted to users@wicket.apache.org by Decebal Suiu <de...@asf.ro> on 2013/01/11 16:19:05 UTC
motion jpeg and wicket
Hi
Is it possible to implement a motion jpeg in wicket [1]. I want to implement
a webcam viewer in wicket. I have a library that give me BufferedImage(s)
from a webcam. Now I can display an BufferedImage in wicket but I want to
move to the next level.
I see two option:
--- Implement M-JPEG over HTTP
"HTTP streaming separates each image into individual HTTP replies on a
specified marker. RTP streaming creates packets of a sequence of JPEG images
that can be received by clients such as QuickTime or VLC.
In response to a GET request for a MJPEG file or stream, the server streams
the sequence of JPEG frames over HTTP. A special mime-type content type
multipart/x-mixed-replace;boundary=<boundary-name> informs the client to
expect several parts (frames) as an answer delimited by <boundary-name>.
This boundary name is expressly disclosed within the MIME-type declaration
itself. The TCP connection is not closed as long as the client wants to
receive new frames and the server wants to provide new frames."
--- I can use wicket 6.x websocket (atmosphere or native) to push the next
image frame to wicket component.
See you another approach? Any advice is welcome.
[1] http://en.wikipedia.org/wiki/Motion_JPEG
Best regards,
Decebal
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Re: motion jpeg and wicket
Posted by Martin Grigorov <mg...@apache.org>.
On Mon, Jan 14, 2013 at 11:23 AM, Ernesto Reinaldo Barreiro <
reiern70@gmail.com> wrote:
> Marc,
>
> You could still use another servlet and have access to wicket session
> via WicketSessionFilter.
>
Or use #mountReference(new MyResourceReference()) with MyIResourceImpl().
>
> On Mon, Jan 14, 2013 at 10:12 AM, Marc Nuri San Félix <marc@marcnuri.com
> >wrote:
>
> > Hello
> > The complex way of solving your problem would be by means of an
> > IRequestHandler and an IRequestMapper. I use this same system to generate
> > JSON responses in my projects without the need of using another servlet
> > thus sharing all of my wicket Session security information.
> >
> > Your IRequestHandler should proxy the WebCam output to your response in a
> > way similar to this:
> >
> > public void respond(IRequestCycle requestCycle) {
> > //Send bytes to the response you would need to gather your bytes first
> > requestCycle.getResponse().write(/* bytes*/);
> > //Get direct acces to outputStream so you can send bytes without holding
> > them in memory...
> > requestCycle.getResponse().getOutputStream();
> > //This may also be useful
> > if (requestCycle.getResponse() instanceof WebResponse) {
> > ((WebResponse)
> > requestCycle.getResponse()).setContentType("YOUR/MIME/TYPE;
> > charset=YOUR-CONTENT-ENCODING");
> > }
> > }
> >
> > Then you should program some kind of IRequestMapper that will handle your
> > Requests and return your custom IRequestHandler.
> >
> > Regards
> > --
> > Marc Nuri
> > www.marcnuri.com
> >
> >
> > On Fri, Jan 11, 2013 at 11:19 PM, Martin Grigorov <mgrigorov@apache.org
> > >wrote:
> >
> > > You may try to push the updates with Atmosphere/Native WebSockets.
> > >
> > > Also see https://github.com/videlalvaro/gifsockets. May be useful for
> > you.
> > >
> > >
> > > On Sat, Jan 12, 2013 at 12:14 AM, Decebal Suiu <de...@asf.ro>
> > > wrote:
> > >
> > > > Hi
> > > >
> > > > @Marc Implementation using AjaxSelfUpdatingTimerBehavior is better
> that
> > > > nothing, it's quick and dirty but it's not scalable. Think at some
> > > webcams
> > > > on the same page with a FPS (frame per second) around 5.
> > > >
> > > > @Ernesto Cabzola has a streamer based on "multipart/x-mixed-replace"
> > mime
> > > > type but it uses a SocketServer to servers the clients and I want to
> > use
> > > my
> > > > servlet container that host my wicket application. I can use
> > > mjpg-streamer
> > > > [1] or motion [2] to achieve the same functionality but I don't want
> to
> > > > install additional software on my machine.
> > > >
> > > > Also I can write a StreamerServlet that serves requests related to
> > > motion
> > > > jpeg but my idea is to use the security, page parameters from my
> wicket
> > > > application. For example on
> > > http://webcamapp/webcam?fps=2&webcamId=1request
> > > > I want to have the freedom to response with a
> > "multipart/x-mixed-replace"
> > > > mime type and writing my image bytes on response.getOutputStream(); I
> > > want
> > > > here to do what I must do in a StreamerServlet [3] . Is it possible
> to
> > > have
> > > > access completely to http response from wicket? Must I use a mapper
> or
> > a
> > > > bookmarkable page? Does my idea make sense?
> > > >
> > > > Another idea of mine is to use websocket (I want to explore more on
> > this
> > > > field :)) but I don't know if it's recommended for my scenario.
> > > >
> > > >
> > > > [1] http://sourceforge.net/projects/mjpg-streamer/
> > > > [2] http://www.lavrsen.dk/foswiki/bin/view/Motion/WebHome
> > > >
> > > > [3] out.writeBytes("Content-Type:
> multipart/x-mixed-replace;boundary="
> > +
> > > > BOUNDARY + "\r\n");
> > > > out.writeBytes("\r\n");
> > > > out.writeBytes("--" + BOUNDARY + "\n");
> > > >
> > > > byte[] imageBytes = ... ;
> > > > while (true) {
> > > > out.writeBytes("Content-type: image/jpeg\n\n");
> > > > out.write(imageBytes); // pseudo code
> > > > out.writeBytes("--" + BOUNDARY + "\n");
> > > > out.flush();
> > > > Thread.sleep(500);
> > > > }
> > > >
> > > >
> > > > Best regards,
> > > > Decebal
> > > >
> > > >
> > > >
> > > > --
> > > > View this message in context:
> > > >
> > >
> >
> http://apache-wicket.1842946.n4.nabble.com/motion-jpeg-and-wicket-tp4655294p4655309.html
> > > > Sent from the Users forum mailing list archive at Nabble.com.
> > > >
> > > > ---------------------------------------------------------------------
> > > > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> > > > For additional commands, e-mail: users-help@wicket.apache.org
> > > >
> > > >
> > >
> > >
> > > --
> > > Martin Grigorov
> > > jWeekend
> > > Training, Consulting, Development
> > > http://jWeekend.com <http://jweekend.com/>
> > >
> >
>
>
>
> --
> Regards - Ernesto Reinaldo Barreiro
> Antilia Soft
> http://antiliasoft.com/ <http://antiliasoft.com/antilia>
>
--
Martin Grigorov
jWeekend
Training, Consulting, Development
http://jWeekend.com <http://jweekend.com/>
Re: motion jpeg and wicket
Posted by Ernesto Reinaldo Barreiro <re...@gmail.com>.
Marc,
You could still use another servlet and have access to wicket session
via WicketSessionFilter.
On Mon, Jan 14, 2013 at 10:12 AM, Marc Nuri San Félix <ma...@marcnuri.com>wrote:
> Hello
> The complex way of solving your problem would be by means of an
> IRequestHandler and an IRequestMapper. I use this same system to generate
> JSON responses in my projects without the need of using another servlet
> thus sharing all of my wicket Session security information.
>
> Your IRequestHandler should proxy the WebCam output to your response in a
> way similar to this:
>
> public void respond(IRequestCycle requestCycle) {
> //Send bytes to the response you would need to gather your bytes first
> requestCycle.getResponse().write(/* bytes*/);
> //Get direct acces to outputStream so you can send bytes without holding
> them in memory...
> requestCycle.getResponse().getOutputStream();
> //This may also be useful
> if (requestCycle.getResponse() instanceof WebResponse) {
> ((WebResponse)
> requestCycle.getResponse()).setContentType("YOUR/MIME/TYPE;
> charset=YOUR-CONTENT-ENCODING");
> }
> }
>
> Then you should program some kind of IRequestMapper that will handle your
> Requests and return your custom IRequestHandler.
>
> Regards
> --
> Marc Nuri
> www.marcnuri.com
>
>
> On Fri, Jan 11, 2013 at 11:19 PM, Martin Grigorov <mgrigorov@apache.org
> >wrote:
>
> > You may try to push the updates with Atmosphere/Native WebSockets.
> >
> > Also see https://github.com/videlalvaro/gifsockets. May be useful for
> you.
> >
> >
> > On Sat, Jan 12, 2013 at 12:14 AM, Decebal Suiu <de...@asf.ro>
> > wrote:
> >
> > > Hi
> > >
> > > @Marc Implementation using AjaxSelfUpdatingTimerBehavior is better that
> > > nothing, it's quick and dirty but it's not scalable. Think at some
> > webcams
> > > on the same page with a FPS (frame per second) around 5.
> > >
> > > @Ernesto Cabzola has a streamer based on "multipart/x-mixed-replace"
> mime
> > > type but it uses a SocketServer to servers the clients and I want to
> use
> > my
> > > servlet container that host my wicket application. I can use
> > mjpg-streamer
> > > [1] or motion [2] to achieve the same functionality but I don't want to
> > > install additional software on my machine.
> > >
> > > Also I can write a StreamerServlet that serves requests related to
> > motion
> > > jpeg but my idea is to use the security, page parameters from my wicket
> > > application. For example on
> > http://webcamapp/webcam?fps=2&webcamId=1request
> > > I want to have the freedom to response with a
> "multipart/x-mixed-replace"
> > > mime type and writing my image bytes on response.getOutputStream(); I
> > want
> > > here to do what I must do in a StreamerServlet [3] . Is it possible to
> > have
> > > access completely to http response from wicket? Must I use a mapper or
> a
> > > bookmarkable page? Does my idea make sense?
> > >
> > > Another idea of mine is to use websocket (I want to explore more on
> this
> > > field :)) but I don't know if it's recommended for my scenario.
> > >
> > >
> > > [1] http://sourceforge.net/projects/mjpg-streamer/
> > > [2] http://www.lavrsen.dk/foswiki/bin/view/Motion/WebHome
> > >
> > > [3] out.writeBytes("Content-Type: multipart/x-mixed-replace;boundary="
> +
> > > BOUNDARY + "\r\n");
> > > out.writeBytes("\r\n");
> > > out.writeBytes("--" + BOUNDARY + "\n");
> > >
> > > byte[] imageBytes = ... ;
> > > while (true) {
> > > out.writeBytes("Content-type: image/jpeg\n\n");
> > > out.write(imageBytes); // pseudo code
> > > out.writeBytes("--" + BOUNDARY + "\n");
> > > out.flush();
> > > Thread.sleep(500);
> > > }
> > >
> > >
> > > Best regards,
> > > Decebal
> > >
> > >
> > >
> > > --
> > > View this message in context:
> > >
> >
> http://apache-wicket.1842946.n4.nabble.com/motion-jpeg-and-wicket-tp4655294p4655309.html
> > > Sent from the Users forum mailing list archive at Nabble.com.
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> > > For additional commands, e-mail: users-help@wicket.apache.org
> > >
> > >
> >
> >
> > --
> > Martin Grigorov
> > jWeekend
> > Training, Consulting, Development
> > http://jWeekend.com <http://jweekend.com/>
> >
>
--
Regards - Ernesto Reinaldo Barreiro
Antilia Soft
http://antiliasoft.com/ <http://antiliasoft.com/antilia>
Re: motion jpeg and wicket
Posted by Marc Nuri San Félix <ma...@marcnuri.com>.
Ernesto I prefer to have all my URL mappings centralized, so I try to use
the Wicket way where available. Although it's interesting to know that you
can access wicket Session this way.
What I'd really do is try to proxy/tunnel the stream directly from the
webcam to the client using an appropriate format once I've checked the
request is from an identified client. This would be the most memory
efficient way.
I suppose that if the webcam offers some kind of streamable video format
(instead of buffered images), you could forward the response output from
the webcam to the client. This way the client would make a single request
to your wicket server and cpu and memory usage would be minimized.
Regards
--
Marc Nuri
www.marcnuri.com
On Mon, Jan 14, 2013 at 10:30 AM, Decebal Suiu <de...@asf.ro> wrote:
> Hi Marc
>
> Thanks for response. A custom Mapper with a RequestHandler that do my job
> was one of ideas but onRespond I must implement a while loop and I know if
> it's ok.
>
> For example:
> public void respond(IRequestCycle requestCycle) {
> // se content type to "multipart/x-mixed-replace;boundary=myboundry"
> // set no cache
> // send grab images
> while (!stop) {
> // send next images
> // sleep some milliseconds related to FPS (frames on second)
> }
> }
>
> A solution is to use an external servlet that handles request related to
> webcam or a wicket push technic.
> For me, wicket is a (nice) hammer on web development and the problem is
> that
> I intend to resolve all problems this hammer :)
>
> Best regards,
> Decebal
>
>
>
> --
> View this message in context:
> http://apache-wicket.1842946.n4.nabble.com/motion-jpeg-and-wicket-tp4655294p4655340.html
> Sent from the Users forum mailing list archive at Nabble.com.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
Re: motion jpeg and wicket
Posted by Decebal Suiu <de...@asf.ro>.
Hi Marc
Thanks for response. A custom Mapper with a RequestHandler that do my job
was one of ideas but onRespond I must implement a while loop and I know if
it's ok.
For example:
public void respond(IRequestCycle requestCycle) {
// se content type to "multipart/x-mixed-replace;boundary=myboundry"
// set no cache
// send grab images
while (!stop) {
// send next images
// sleep some milliseconds related to FPS (frames on second)
}
}
A solution is to use an external servlet that handles request related to
webcam or a wicket push technic.
For me, wicket is a (nice) hammer on web development and the problem is that
I intend to resolve all problems this hammer :)
Best regards,
Decebal
--
View this message in context: http://apache-wicket.1842946.n4.nabble.com/motion-jpeg-and-wicket-tp4655294p4655340.html
Sent from the Users forum mailing list archive at Nabble.com.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
For additional commands, e-mail: users-help@wicket.apache.org
Re: motion jpeg and wicket
Posted by Marc Nuri San Félix <ma...@marcnuri.com>.
Hello
The complex way of solving your problem would be by means of an
IRequestHandler and an IRequestMapper. I use this same system to generate
JSON responses in my projects without the need of using another servlet
thus sharing all of my wicket Session security information.
Your IRequestHandler should proxy the WebCam output to your response in a
way similar to this:
public void respond(IRequestCycle requestCycle) {
//Send bytes to the response you would need to gather your bytes first
requestCycle.getResponse().write(/* bytes*/);
//Get direct acces to outputStream so you can send bytes without holding
them in memory...
requestCycle.getResponse().getOutputStream();
//This may also be useful
if (requestCycle.getResponse() instanceof WebResponse) {
((WebResponse)
requestCycle.getResponse()).setContentType("YOUR/MIME/TYPE;
charset=YOUR-CONTENT-ENCODING");
}
}
Then you should program some kind of IRequestMapper that will handle your
Requests and return your custom IRequestHandler.
Regards
--
Marc Nuri
www.marcnuri.com
On Fri, Jan 11, 2013 at 11:19 PM, Martin Grigorov <mg...@apache.org>wrote:
> You may try to push the updates with Atmosphere/Native WebSockets.
>
> Also see https://github.com/videlalvaro/gifsockets. May be useful for you.
>
>
> On Sat, Jan 12, 2013 at 12:14 AM, Decebal Suiu <de...@asf.ro>
> wrote:
>
> > Hi
> >
> > @Marc Implementation using AjaxSelfUpdatingTimerBehavior is better that
> > nothing, it's quick and dirty but it's not scalable. Think at some
> webcams
> > on the same page with a FPS (frame per second) around 5.
> >
> > @Ernesto Cabzola has a streamer based on "multipart/x-mixed-replace" mime
> > type but it uses a SocketServer to servers the clients and I want to use
> my
> > servlet container that host my wicket application. I can use
> mjpg-streamer
> > [1] or motion [2] to achieve the same functionality but I don't want to
> > install additional software on my machine.
> >
> > Also I can write a StreamerServlet that serves requests related to
> motion
> > jpeg but my idea is to use the security, page parameters from my wicket
> > application. For example on
> http://webcamapp/webcam?fps=2&webcamId=1request
> > I want to have the freedom to response with a "multipart/x-mixed-replace"
> > mime type and writing my image bytes on response.getOutputStream(); I
> want
> > here to do what I must do in a StreamerServlet [3] . Is it possible to
> have
> > access completely to http response from wicket? Must I use a mapper or a
> > bookmarkable page? Does my idea make sense?
> >
> > Another idea of mine is to use websocket (I want to explore more on this
> > field :)) but I don't know if it's recommended for my scenario.
> >
> >
> > [1] http://sourceforge.net/projects/mjpg-streamer/
> > [2] http://www.lavrsen.dk/foswiki/bin/view/Motion/WebHome
> >
> > [3] out.writeBytes("Content-Type: multipart/x-mixed-replace;boundary=" +
> > BOUNDARY + "\r\n");
> > out.writeBytes("\r\n");
> > out.writeBytes("--" + BOUNDARY + "\n");
> >
> > byte[] imageBytes = ... ;
> > while (true) {
> > out.writeBytes("Content-type: image/jpeg\n\n");
> > out.write(imageBytes); // pseudo code
> > out.writeBytes("--" + BOUNDARY + "\n");
> > out.flush();
> > Thread.sleep(500);
> > }
> >
> >
> > Best regards,
> > Decebal
> >
> >
> >
> > --
> > View this message in context:
> >
> http://apache-wicket.1842946.n4.nabble.com/motion-jpeg-and-wicket-tp4655294p4655309.html
> > Sent from the Users forum mailing list archive at Nabble.com.
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> > For additional commands, e-mail: users-help@wicket.apache.org
> >
> >
>
>
> --
> Martin Grigorov
> jWeekend
> Training, Consulting, Development
> http://jWeekend.com <http://jweekend.com/>
>
Re: motion jpeg and wicket
Posted by Martin Grigorov <mg...@apache.org>.
You may try to push the updates with Atmosphere/Native WebSockets.
Also see https://github.com/videlalvaro/gifsockets. May be useful for you.
On Sat, Jan 12, 2013 at 12:14 AM, Decebal Suiu <de...@asf.ro> wrote:
> Hi
>
> @Marc Implementation using AjaxSelfUpdatingTimerBehavior is better that
> nothing, it's quick and dirty but it's not scalable. Think at some webcams
> on the same page with a FPS (frame per second) around 5.
>
> @Ernesto Cabzola has a streamer based on "multipart/x-mixed-replace" mime
> type but it uses a SocketServer to servers the clients and I want to use my
> servlet container that host my wicket application. I can use mjpg-streamer
> [1] or motion [2] to achieve the same functionality but I don't want to
> install additional software on my machine.
>
> Also I can write a StreamerServlet that serves requests related to motion
> jpeg but my idea is to use the security, page parameters from my wicket
> application. For example on http://webcamapp/webcam?fps=2&webcamId=1request
> I want to have the freedom to response with a "multipart/x-mixed-replace"
> mime type and writing my image bytes on response.getOutputStream(); I want
> here to do what I must do in a StreamerServlet [3] . Is it possible to have
> access completely to http response from wicket? Must I use a mapper or a
> bookmarkable page? Does my idea make sense?
>
> Another idea of mine is to use websocket (I want to explore more on this
> field :)) but I don't know if it's recommended for my scenario.
>
>
> [1] http://sourceforge.net/projects/mjpg-streamer/
> [2] http://www.lavrsen.dk/foswiki/bin/view/Motion/WebHome
>
> [3] out.writeBytes("Content-Type: multipart/x-mixed-replace;boundary=" +
> BOUNDARY + "\r\n");
> out.writeBytes("\r\n");
> out.writeBytes("--" + BOUNDARY + "\n");
>
> byte[] imageBytes = ... ;
> while (true) {
> out.writeBytes("Content-type: image/jpeg\n\n");
> out.write(imageBytes); // pseudo code
> out.writeBytes("--" + BOUNDARY + "\n");
> out.flush();
> Thread.sleep(500);
> }
>
>
> Best regards,
> Decebal
>
>
>
> --
> View this message in context:
> http://apache-wicket.1842946.n4.nabble.com/motion-jpeg-and-wicket-tp4655294p4655309.html
> Sent from the Users forum mailing list archive at Nabble.com.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
--
Martin Grigorov
jWeekend
Training, Consulting, Development
http://jWeekend.com <http://jweekend.com/>
Re: motion jpeg and wicket
Posted by Decebal Suiu <de...@asf.ro>.
Hi
@Marc Implementation using AjaxSelfUpdatingTimerBehavior is better that
nothing, it's quick and dirty but it's not scalable. Think at some webcams
on the same page with a FPS (frame per second) around 5.
@Ernesto Cabzola has a streamer based on "multipart/x-mixed-replace" mime
type but it uses a SocketServer to servers the clients and I want to use my
servlet container that host my wicket application. I can use mjpg-streamer
[1] or motion [2] to achieve the same functionality but I don't want to
install additional software on my machine.
Also I can write a StreamerServlet that serves requests related to motion
jpeg but my idea is to use the security, page parameters from my wicket
application. For example on http://webcamapp/webcam?fps=2&webcamId=1 request
I want to have the freedom to response with a "multipart/x-mixed-replace"
mime type and writing my image bytes on response.getOutputStream(); I want
here to do what I must do in a StreamerServlet [3] . Is it possible to have
access completely to http response from wicket? Must I use a mapper or a
bookmarkable page? Does my idea make sense?
Another idea of mine is to use websocket (I want to explore more on this
field :)) but I don't know if it's recommended for my scenario.
[1] http://sourceforge.net/projects/mjpg-streamer/
[2] http://www.lavrsen.dk/foswiki/bin/view/Motion/WebHome
[3] out.writeBytes("Content-Type: multipart/x-mixed-replace;boundary=" +
BOUNDARY + "\r\n");
out.writeBytes("\r\n");
out.writeBytes("--" + BOUNDARY + "\n");
byte[] imageBytes = ... ;
while (true) {
out.writeBytes("Content-type: image/jpeg\n\n");
out.write(imageBytes); // pseudo code
out.writeBytes("--" + BOUNDARY + "\n");
out.flush();
Thread.sleep(500);
}
Best regards,
Decebal
--
View this message in context: http://apache-wicket.1842946.n4.nabble.com/motion-jpeg-and-wicket-tp4655294p4655309.html
Sent from the Users forum mailing list archive at Nabble.com.
---------------------------------------------------------------------
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Re: motion jpeg and wicket
Posted by Ernesto Reinaldo Barreiro <re...@gmail.com>.
Hi,
On Fri, Jan 11, 2013 at 4:19 PM, Decebal Suiu <de...@asf.ro> wrote:
> Hi
>
> Is it possible to implement a motion jpeg in wicket [1]. I want to
> implement
> a webcam viewer in wicket. I have a library that give me BufferedImage(s)
> from a webcam. Now I can display an BufferedImage in wicket but I want to
> move to the next level.
>
> I see two option:
> --- Implement M-JPEG over HTTP
> "HTTP streaming separates each image into individual HTTP replies on a
> specified marker. RTP streaming creates packets of a sequence of JPEG
> images
> that can be received by clients such as QuickTime or VLC.
> In response to a GET request for a MJPEG file or stream, the server streams
> the sequence of JPEG frames over HTTP. A special mime-type content type
> multipart/x-mixed-replace;boundary=<boundary-name> informs the client to
> expect several parts (frames) as an answer delimited by <boundary-name>.
> This boundary name is expressly disclosed within the MIME-type declaration
> itself. The TCP connection is not closed as long as the client wants to
> receive new frames and the server wants to provide new frames."
> --- I can use wicket 6.x websocket (atmosphere or native) to push the next
> image frame to wicket component.
>
> See you another approach? Any advice is welcome.
>
>
Isn't
http://www.charliemouse.com/code/cambozola/
suitable for your needs?
--
Regards - Ernesto Reinaldo Barreiro
Antilia Soft
http://antiliasoft.com/ <http://antiliasoft.com/antilia>
Re: motion jpeg and wicket
Posted by Marc Nuri San Félix <ma...@marcnuri.com>.
Hello
This is not a motion jpeg, but it can be used to accomplish your needs
without major complications
You can create a Panel with an image that replaces the image every time it
renders overriding the onBeforeRender method:
addOrReplace(new Image("image", new BufferedDynamicImageResource(image)))
and add AjaxSelfUpdatingTimerBehavior to the Panel with the specified
refresh rate.
I believe this is the easiest and most straightforward way of doing what
you need.
Cheers
--
Marc Nuri
www.marcnuri.com
On Fri, Jan 11, 2013 at 4:19 PM, Decebal Suiu <de...@asf.ro> wrote:
> Hi
>
> Is it possible to implement a motion jpeg in wicket [1]. I want to
> implement
> a webcam viewer in wicket. I have a library that give me BufferedImage(s)
> from a webcam. Now I can display an BufferedImage in wicket but I want to
> move to the next level.
>
> I see two option:
> --- Implement M-JPEG over HTTP
> "HTTP streaming separates each image into individual HTTP replies on a
> specified marker. RTP streaming creates packets of a sequence of JPEG
> images
> that can be received by clients such as QuickTime or VLC.
> In response to a GET request for a MJPEG file or stream, the server streams
> the sequence of JPEG frames over HTTP. A special mime-type content type
> multipart/x-mixed-replace;boundary=<boundary-name> informs the client to
> expect several parts (frames) as an answer delimited by <boundary-name>.
> This boundary name is expressly disclosed within the MIME-type declaration
> itself. The TCP connection is not closed as long as the client wants to
> receive new frames and the server wants to provide new frames."
> --- I can use wicket 6.x websocket (atmosphere or native) to push the next
> image frame to wicket component.
>
> See you another approach? Any advice is welcome.
>
> [1] http://en.wikipedia.org/wiki/Motion_JPEG
>
> Best regards,
> Decebal
>
>
>
> --
> View this message in context:
> http://apache-wicket.1842946.n4.nabble.com/motion-jpeg-and-wicket-tp4655294.html
> Sent from the Users forum mailing list archive at Nabble.com.
>
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