[gst-devel] Need help for rezising video.

[Timothy Braun]

The capsfilter isn't going to do anything for you unless something in the
pipeline is able to make the needed changes to match the caps.  Before the
capsfilter you should add a videoscale element so it is able to match the
requested caps of the filter.  You may also want to take a gander at the
ffmpeg_colorspace and videorate elements as well.

As a side note:
You can simplify the creation of the caps with the gst_caps_from_string(
"video/x-raw-yuv, format=I420, width=800, height=600") call.
You need to unref the caps when you're done with it as well.

Just my 2c.

Best,
Tim

On Tue, Jan 4, 2011 at 2:02 PM, Nicolas <c.r.n.a at wanadoo.fr> wrote:

> Hi,
>
> Thanks for your reply.
>
> Ok, i do:
>
> pipeline = gst_pipeline_new ("pipeline");
> playbin = gst_element_factory_make ("playbin2", "playbin");
>
> // Filter
> filter = gst_element_factory_make ("capsfilter", "filter");
> caps = gst_caps_new_simple ("video/x-raw-yuv", "format",
> GST_TYPE_FOURCC, GST_MAKE_FOURCC ('I', '4', '2', '0'), "width",
> G_TYPE_INT, 800, "height", G_TYPE_INT, 600, NULL);
> g_object_set ((GObject*) filter, "caps", caps, NULL);
>
> // My sink
> sink = gst_element_factory_make ("evasvideosink", "sink");
> g_object_set ((GObject*) playbin, "video-sink", sink, NULL); // Tell to
> playbin2 to use my sink
> g_object_set ((GObject*) playbin, "uri", argv[1], NULL);
> g_object_set ((GObject*) sink, "evas-object", video, NULL); // Tell my
> sink to use evas image
>
> gst_bin_add_many (GST_BIN (pipeline), playbin, filter, NULL);
>
> gst_element_set_state (pipeline, GST_STATE_PLAYING);
>
> It does not change the size of the video, is this the correct way ?
>
> Thanks in advance for your reply,
> Nicolas.
>
>
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