On Fri, Dec 7, 2018 at 11:27 AM jb <j...@kdenlive.org> wrote:
> Hi,
>
> In shotcut, the <consumer> tag is used in the playlist's xml to pass
> consumer
> arguments, allowing to render a playlist file with melt whitout passing
> extra
> arguments.
>
> I am considering using the same approach for Kdenlive, but there is one
> small
> missing feature for us:
>
> it would be useful to allow rendering only part of the playlist using this
> method. My idea was to allow in/out attributes on the consumer that would
> then
> be passed on the producer to allow rendering only a part of the project.
>
> A simple patch to melt, like mine below, implements the feature.
>
> Would you be ok to include such feature ?
>
>
Yes, go ahead and commit it directly.
> Thanks
> Jean-Baptiste
>
> ---------------------------------------------------------------
> diff --git a/src/melt/melt.c b/src/melt/melt.c
> index ab3a0ab4..300f9c88 100644
> --- a/src/melt/melt.c
> +++ b/src/melt/melt.c
> @@ -972,11 +972,18 @@ query_all:
>
> // Get the last group
> mlt_properties group = mlt_properties_get_data(
> melt_props,
> "group", 0 );
> -
> +
> // Apply group settings
> mlt_properties properties =
> MLT_CONSUMER_PROPERTIES( consumer
> );
> mlt_properties_inherit( properties, group );
> -
> + int in = mlt_properties_get_int( properties, "in"
> );
> + int out = mlt_properties_get_int( properties,
> "out" );
> + if ( in > 0 || out > 0 ) {
> + if ( out == 0 ) {
> + out = mlt_producer_get_length(
> melt ) - 1;
> + }
> + mlt_producer_set_in_and_out(melt, in, out);
> + }
> // Connect consumer to melt
> mlt_consumer_connect( consumer,
> MLT_PRODUCER_SERVICE( melt )
> );
>
>
>
>
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