Playing video on ClutterTexture

I thought this would be an easy task and should be doable in a weekend but seems I wasn't completely correct in my assumption. What I did was to try to modify the super-oh example application to make it render frames from videotestsrc element of gstreamer, instead of the OH logo (no offense OH guys). For some reason the animation stops after I render the first frame. All I get is a static image like this:



My hunch is that I am just missing something small here so if anyone have a clue, please let me know. Here is the source.

I know that using fakesink's handoff signal isn't the recommended way to do this but I'll concider writing a cluttersink after I get this simple app. working.


UPDATE: I've been informed about the existance of ClutterGstVideoTexture and ClutterGstVideoSink by Emmanuele and Ross. Looking at the sources, I think I'll need to hack on it to support YUV (if it's available). That shouldn't be a problem but I would also want to try to implement this trick to bring hope to poor ATI grahics card users like me.

Comments

Emmanuele said…
zeenix, have you seen clutter-gst, with ClutterGstVideoTexture and ClutterGstVideoSink, right? :-)
November 12, 2007 at 4:26 AM
zeenix said…
I have seen clutter-gst package and i have it installed but never knew what it offers as `gst-inspect-0.10 |grep clutter` doesn't show anything. Wouldn't it be nice to install these elements as normal gst elements in a plugin file? Also the clutter-gst docs are empty. Anyway! i'll look at the headers now, which is what i should have done already. :)
November 12, 2007 at 4:37 AM
Matthew Allum said…
@zeenix: "Wouldn't it be nice to install these elements as normal gst elements in a plugin file?" - could you send patch for that, I wasn't aware you needed to install anything for gst-inspect to pick it up. Patches to docs always appreciated too - though the is really not that much to it public API wise.

Also there is some YUV support but YMMV. Would be interesting if you can integrate that referenced mailing list post.

Thanks for trying out clutter!
November 12, 2007 at 12:13 PM
zeenix said…
Mallum! I already intend to provide the patches you mentioned and I will if time allows but just for the record, I didn't mean any offense. Just that my english isn't good enough for me to be successful in my attempts to sound polite. :(
November 12, 2007 at 12:32 PM
Post a Comment

Popular posts from this blog

Welcome to the virtual world!

Image
About two months ago I informed  the followers of this blog that I will now be working on SPICE project  for Red Hat . Judging from the questions I was asked after that, I realized that not many people know about SPICE so I thought I write at least one blog entry dedicated to explaining what SPICE is all about. Before I get to SPICE itself, let me first introduce you to the world SPICE lives in. Virtualization and Virtual Machines (VMs) For some reason, I feel that I should leave the definitions to wikipedia  and only quote it so that is what I am going to do: " Virtualization, in computing, is the creation of a virtual (rather than actual) version of something, such as a hardware platform, operating system, a storage device or network resources. " " A virtual machine (VM) is a "completely isolated operating system installation within your normal operating system".Today, this is implemented by either software emulation or hardware virtualization ". V
Read more

clutter-gst

After I was informed about the existence of ClutterGstVideoSink, I quickly modified my super-video application to make it use that. But as soon as i did that, i stopped getting even the static image. After careful analysis for days, I figured that I was supposed to call gst_bus_add_signal_watch() on the pipeline bus since ClutterGstVideoSink uses messages on the bus combined with signal handlers to render the frames in the application thread. This is obviously a 'dirty' hack; a hack because gst elements are supposed to do all the media processing in the pipeline thread, dirty because gst bus is not meant for media transport. After this realization, I had been working on it from time to time. First I tried to make the actual rendering happen in the gst pipeline thread by using the clutter's thread safety primitives and that worked quite nicely in the end except for one minor problem: The call to clutters rendering thread blocks if it happens after the clutter main loop has b
Read more

Shame Ubuntu shame

I am no more a fan of Ubuntu. The reason is their recent demonstration of lack of community spirit. Here is the release announcement of Ubuntu hardy alpha6. If you scroll-down you can see the gnome-system-monitor's new cool "Resources" view featured with a nice screenshot. Since Karl-Lattimer worked really hard to make this happen, he asked to be given personal credit on that page. Don't know about others but I see this as a very reasonable thing to ask. The result of this request can be seen in the announcement of hardy beta. They just removed the feature from the announcement. Shame Ubuntu shame. UPDATE: It's interesting how most of the comments that are from people who got pissed without actually caring to understand the main point of this blog entry (which me and Karl-Lattimer tried to emphasize in the comments) are posting as Anonymous. :) Acknowledging the possibility that they might not think comments are worth reading before commenting, let me make it c
Read more