How to Overlay a video?!

[Heitor Meira]

How to overlay a video with a text, like subtitles?!

[Lucas Alberto]

Hi,
Use the textoverlay element:
http://gstreamer.freedesktop.org/data/doc/gstreamer/0.10.1/gst-plugins-base-plugins/html/gst-plugins-base-plugins-textoverlay.html
The text string can be dinamicaly changed.

lucasa

[Heitor Meira]

Hi Lucas,
Sorry about the late.

I'm using Java. So, pango (Plugin that offers suport to text overlay)
is not disponible.

Do you have any other idea?

[Heitor Meira]

I have about the Pads... Somebodey knows if I can do it using Pads?!

[Roberto Faga]

Hi heitor,

You'll need to use gobjects anyway, so a default windows install can't
run Java-gst until you install gstreamer, and gstreamer requires
gobject. To run my app in windows I install this package:

http://code.google.com/p/ossbuild/

Then I can run Gstreamer and textoverlay rightly. An example of how to
use textoverlay in a playbin2 (how I'm using in my test):

Element playbin = ElementFactory.make("playbin2", "playbin2");
playbin.set("uri", "file:///C:\\video.avi");
VideoComponent videoComponent = new VideoComponent();

Element videosink = videoComponent.getElement();
Element textoverlay = ElementFactory.make("textoverlay", "textoverlay");
Bin bin = new Bin("myBin");

bin.add(textoverlay);
Pad pad = textoverlay.getPad("video_sink");
GhostPad ghostpad = new GhostPad("sink", pad);
bin.addPad(ghostpad);
bin.add(videosink);

textoverlay.set("text", "Welcome to the Jungle!");
textoverlay.set("valign", "top");
textoverlay.set("halign", "right");
textoverlay.set("shaded-background", "yes");
textoverlay.set("font-desc", "Sans Bold 16");

Element.linkMany(textoverlay, videosink);

playbin.set("video-sink", bin);
playbin.setState(State.PLAYING);

but I think you could add this created bin as a videoSink in any other
class. I ran this code in windows and linux succesfully.

Roberto

On Sat, Nov 21, 2009 at 17:23, Heitor Meira <htrm...@gmail.com> wrote:
> I have about the Pads... Somebodey knows if I can do it using Pads?!
>

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[Heitor Meira]

Hi Roberto, Thank you for the example...
It works perfectly here...

I was just using PlayBin, and I think that it's kind of high level part of the framework.

[Roberto Faga]

I think this code will work with PlayBin too, just change the
video-sink to the custom bin. I'll try later with VideoPlayer (Swing
component) which is the most high level component in gst-java to play
videos.

Roberto