On Wed, May 14, 2014 at 3:33 AM, hatsch <hat...@gmail.com> wrote:
> hello everyone,
> i am trying to use the great webvfx producer for dynamic content on
> our melted playout server.
> the profile we are using for SDI (decklink) playout is dv_pal_wide,
>
> unfortunately the webvfx producer doesn't seem to care about
> anamorphic pixels and therefore only shows a canvas of 720x576 in
>
It is not the responsibility of the webvfx producer to care about that. It
only has the responsibility to indicate its pixel aspect ratio as 1.0,
which it does here:
https://github.com/mltframework/webvfx/blob/master/mlt/webvfx_producer.cpp#L107
It is the responsibility of the automatically added resize and rescale
filters to normalize the aspect ratio of the source to the mlt_profile.
However, there is also the frame property "aspect_ratio" that still needs
to be set, but it does not. When not set, the framework sets the frame's
default aspect_ratio to that of the profile. I think this is the problem.
Perhaps a change is needed in the framework to set the frame's aspect ratio
from the producer's meta. properties.
> square pixel where it should be 1024 pixel width for fullscreen.
>
> has anyone an idea how i can get the webvfx producer to show the full
> 1024x576 webpage and output it to 720x576 anamorph via SDI?
>
> any input or workaround is very appreciated!
>
You are compiling webvfx yourself? If so, modify
mlt/webvfx_producer.cpp:getFrame(). Where you see:
mlt_properties_set_int(properties, "progressive", 1);
Add line:
mlt_properties_set_double(properties, "aspect_ratio", 1.0);
See if that fixes the problem.
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