Le vendredi 10 février 2012 15:51:01, Christophe Thommeret a écrit :
> Le vendredi 10 février 2012 04:50:31, Dan Dennedy a écrit :
> > On Thu, Feb 9, 2012 at 3:12 PM, Christophe Thommeret <[email protected]>
wrote:
> > > Le jeudi 9 février 2012 23:34:14, Dan Dennedy a écrit :
> > >> Note also that with consumer.real_time <> 0 there is a thread running
> > >> to pre-render frames, and that thread defaults to mlt_image_yuv422,
> > >> but you can change it by setting property mlt_image_format=yuv420p on
> > >> the consumer (added since last release).
> > >
> > > I'm running with the default real_time=1.
> > > Could you tell me more about setting this consumer' format property ?
> >
> > When real_time != 0, mlt_consumer.c spawns abs(real_time) threads that
> > loop fetching a frame and calling mlt_frame_get_image(), and that call
> > has a format parameter. It gets the format from the consumer property
> > named "mlt_image_format," which accepts the names: yuv420p, yuv422,
> > rgb24, rgb24a, or none.
> >
> > In December, I added support for mlt_image_none for a customer. This
> > asks mlt_frame_get_image() to return the format that is closest to its
> > native format. But the caller can really only expect that when there
> > are no filters including normalizing filters.
>
> Ok, setting this property to "yuv420p" or "none", glsl.csc gets yuv420p.
> But whatever i set, when i add a filter (e.g. "melt -consumer qgl -filter
> glsl.greyscale /path/to/file"), melt crashes. I found that it happens in
> producer_avformat, where allocate_buffer gets mlt_image_glsl.
Actually, i fix this by adding this in allocate_buffer:
if ( *format == mlt_image_glsl )
*format = pick_format( codec_context->pix_fmt );
that may be not the correct fix, but at least it works.
Is there other producers that do internal csc?
--
Christophe Thommeret
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