[gst-devel] Alpha plugin in GStreamer not working properly

[Kapil Agrawal]

Miguel,

Can you please run your pipeline with GST_DEBUG=*:2 and pastebin the logs ?
Also based on your mail not clear whats the error,which is needed to give
appropriate help.

One guess, you should have queue, before the mixer.

cheers
Kapil

On Mon, May 3, 2010 at 2:57 PM, Miguel Escriva <miesgre at gmail.com> wrote:

> Hi!
>
> I'm trying to compose two videos, and I'm using the alpha plug-in to make
> the white color transparent.
> To test the alpha plug-in I'm creating the pipeline with gst-launch.
>
> The first test I done was:
>
> gst-launch videotestsrc pattern=smpte75  \
>     ! alpha method=custom target-r=255 target-g=255 target-b=255 angle=10 \
>     ! videomixer name=mixer ! ffmpegcolorspace ! autovideosink  \
>     videotestsrc pattern=snow ! mixer.
>
> and it works great! Then I created two videos with those lines:
>
> gst-launch videotestsrc pattern=snow ! ffmpegcolorspace ! theoraenc !
> oggmux ! filesink location=snow.ogv
> gst-launch videotestsrc pattern=smpte75 ! ffmpegcolorspace ! theoraenc !
> oggmux ! filesink location=bars75.ogv
>
> And changed the videotestsrc to a filesrc and it continues working
>
> gst-launch filesrc location=bars75.ogv ! decodebin2 \
>     ! alpha method=custom target-r=255 target-g=255 target-b=255 angle=10 \
>     ! videomixer name=mixer ! ffmpegcolorspace ! autovideosink  \
>     filesrc location=snow.ogv ! decodebin2 ! alpha ! mixer.
>
>
> But, when I use the ideo I want to compose, I'm not able to make the white
> color transparent
>
> gst-launch filesrc location=video.ogv ! decodebin2 \
>     ! alpha method=custom target-r=255 target-g=255 target-b=255 angle=10 \
>     ! videomixer name=mixer ! ffmpegcolorspace ! autovideosink  \
>     filesrc location=snow.ogv ! decodebin2 ! alpha ! mixer.
>
>
> Can you help me? Any idea what is happening?
> I'm using GStreamer 0.10.28
>
>
> You can download the test videos from here:
> http://polimedia.upv.es/pub/gst/gst.zip
>
>
>
> Thanks in advance,
>   Miguel Escriva
>
>
> ------------------------------------------------------------------------------
>
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>


-- 
http://www.linkedin.com/in/kapilagrawal
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/gstreamer-devel/attachments/20100503/af6e26d3/attachment.htm>