[Kdenlive-devel] Kdenlive + mlt + FreiOr startup bug

[Dan Dennedy]

On Tue, Oct 28, 2008 at 5:32 AM, Marco Gittler <g.marco at freenet.de> wrote:
>> 3) Keyframes
>> Currently, all frei0r effects parameters are fixed. For example, the
>> frei0r.brightness takes a "Brightness" value that is fixed.
>>
>> But I guess we could manage to create keyframes, for example if we
>> set:
>> start_Brightness = 0
>> end_Brightness = 1
>>
>> The MLT frei0r module could interpolate the current brightness value
>> from the
>> producer position and make the "Brightness" value change with time...
>>
>> Do you think it is possible ?
> yes should be, but i think it will be better to use Brightness="0:1" ??
> what do you think

I plan to add more interpolation capabilities at the framework level
similar to the way mlt_geometry works today. Therefore, I suggest
using a single property with a value syntax following:
[frame=]N[;[frame=N]]*. When "frame" = -1, then it means the "end."
(-2 means second last frame and so on.) You can actually use
mlt_geometry for this now as it actually a fairly generic thing that
contains and interpolates up to five floats per key frame allowing all
sorts of characters (except '=') as delimiter. (See man strtod for the
rules - whatever endptr points to ought to be the delimiter.)

-- 
+-DRD-+